Waste Diversion Rate Calculator (Landfill Diversion, Recycling, TRUE and UL 2799 Tiers)

How the calculator works

The tool follows the definition the waste hierarchy and GRI 306 use, and it shows every part of it so nothing is hidden. You add a stream, enter the tonnes you divert through recycling, composting, and reuse, the tonnes that go to energy recovery, and the tonnes that go to landfill, and it works out the total as the sum of all three. The diversion rate is the diverted weight over that total, times 100. The result sits at the top, with the strict zero waste diversion, the diverted and disposed tonnes, the certification tier, and the tonnes still needed to reach 90 percent listed under it, and the bar chart shows how each stream splits between recovery and disposal. On the opening example, 850 diverted out of 1,000 total is 85.0 percent, and the tool tells you it is 50 tonnes short of the threshold.

The two numbers the tool reports are the heart of it. The reported diversion rate counts energy recovery as diverted only when you switch on the count energy recovery as diverted toggle, because some operators quote a landfill diversion figure that includes incineration. The strict zero waste diversion always excludes energy recovery and treats it as disposal, which is what TRUE, UL 2799, and GRI 306 require. When the toggle is off the two numbers are the same, and when it is on they separate by exactly the share of your waste that goes to energy recovery. The tool reads the certification tier from the strict figure every time, because the standards award their tiers for diverting waste by methods other than burning it, and a tier based on a number that counted incineration would not survive an audit.

Contamination is netted out before the rate is formed, because material rejected at the sorter never actually left the disposal stream. When you enter a contamination or reject percentage, the tool multiplies your diverted tonnes by one minus that percentage to get net diverted, and the rejected tonnes move into disposal. A collection of 850 tonnes of recyclables with a 10 percent reject rate becomes 765 tonnes of net diverted, and the disposed figure grows by the 85 tonnes that came back. This mirrors how a materials recovery facility actually settles a load: what counts is the weight that leaves as a sellable bale, not the weight that arrived in the bin, and TRUE caps the contamination a certified facility can carry at 10 percent for exactly this reason.

Volume becomes weight before anything is added together, because you cannot add cubic metres to tonnes. Switch the input unit to cubic metres and the tool multiplies each stream by an editable density in tonnes per cubic metre, so a roll-off of flattened cardboard and a skip of mixed organics both end up on the same weight basis before the rate is computed. The defaults are loose densities: cardboard 0.05, paper 0.08, plastic 0.03, metal 0.20, glass 0.30, organics 0.55, e-waste 0.20, construction and demolition debris 1.30, and other material 0.15 tonnes per cubic metre. Density varies with how much a load is compacted, so these are starting points you override when you know better, and a weighbridge weight is always preferred for an audited report because TRUE and the other standards want diversion proven by weight.

Multiple sites and streams combine by weight, never by averaging percentages, and the tier follows from the combined strict rate. To roll up two plants the tool sums their diverted tonnes and their total tonnes and then divides, so plant A diverting 850 of 1,000 and plant B diverting 100 of 1,000 give a company rate of 950 over 2,000, which is 47.5 percent, not the average of 85 and 10. From the strict combined rate the tool assigns the tier: Platinum at 100 percent, a true zero waste to landfill; Gold at 95 to 99 percent, virtually zero waste; Silver at 90 to 94 percent, zero waste by diversion; and anything below 90 percent sits under the certification threshold. It then reports the tonnes you would need to move from disposal into diversion to cross 90 percent, so the gap to a certification is a concrete number of tonnes rather than an abstract target.

What a waste diversion rate is

A waste diversion rate is the share of the waste your operation generates that is kept out of landfill and incineration through recovery, expressed as a percentage of the total. It exists because a raw tonnage of recycling tells you almost nothing on its own. A site that recycles 500 tonnes sounds better than one that recycles 200, until you learn the first generates 5,000 tonnes and the second generates 400. The diversion rate normalizes recovery against everything you throw away, so a 10 percent rate and a 90 percent rate mean the same thing at any scale: the first buries most of its waste and the second buries almost none. The number is a ratio, diverted weight over total waste weight, and the total is every tonne that leaves the site as waste, whatever its destination.

The waste hierarchy sits behind the metric and gives it direction. The hierarchy ranks options from best to worst as reduce, reuse, recycle, recover energy, and dispose, and a diversion rate rewards everything above disposal. That is why reduction and reuse matter even though they can be invisible in a recycling tonnage: waste you never generate, or a pallet you send back to be used again, both keep material out of landfill without ever passing through a recycling bin. GRI 306: Waste 2020 formalizes this with three disclosures that map onto the metric directly, 306-3 for waste generated, 306-4 for waste diverted from disposal, and 306-5 for waste directed to disposal, and it is explicit that incineration counts as disposal rather than diversion.

The rate is a companion to the absolute tonnage, not a replacement for it, in the same way an emissions intensity sits alongside an absolute footprint. A high diversion rate on a small waste stream and a lower rate on a much larger one are both worth knowing, because the first tells you the operation recovers well while the second may still send more tonnes to landfill in absolute terms. The honest way to use the metric is to report the rate and the generated tonnage together, so a reader can see both how efficiently you recover and how much waste there is to recover from. A diversion rate that keeps rising while total generation quietly balloons is the waste equivalent of the intensity paradox, and reporting only the rate would hide it.

Diversion rate versus recycling rate

Diversion rate and recycling rate are often used as if they were the same, and they are not. The recycling rate counts only material sent to be recycled, divided by the total. The diversion rate is broader: it counts everything kept out of landfill and incineration, which includes recycling but also composting, anaerobic digestion, reuse, and any other recovery that is not disposal. A site can have a modest recycling rate and a strong diversion rate if it composts a large organic stream, because the compost counts as diverted even though none of it was recycled in the strict sense. Reading a recycling rate as though it were a diversion rate understates recovery, and reading a diversion rate as though it were a recycling rate overstates how much material went back into products.

The distinction matters most where organics dominate the waste stream, which is the case across much of the world. Food and garden waste is frequently the single largest fraction of municipal solid waste, and it is diverted by composting or digestion rather than by recycling. A company chasing a diversion target will usually find the fastest gains in that organic stream rather than in squeezing a few more points out of cardboard and cans, because organics are heavy and abundant. So the two rates answer different questions: the recycling rate tells you how much material re-entered manufacturing, and the diversion rate tells you how much waste avoided the landfill by any recovery route at all. State which one you are reporting, and do not let a recycling figure from one source sit next to a diversion figure from another as though they described the same thing.

The tool measures diversion, not recycling, which is why its diverted column is the sum of recycling, composting, and reuse rather than recycling alone. If you want a recycling rate specifically, you would put only the recycled tonnes in the diverted column and treat compost and reuse as their own line, but for a sustainability disclosure the diversion rate is usually the figure that is asked for, because it captures the whole of the recovery effort. GRI 306-4, waste diverted from disposal, is a diversion measure in exactly this sense, and it is the disclosure most corporate waste targets are written against.

Does incineration count as diversion?

Whether energy recovery counts as diversion is the single decision that moves a diversion rate the most, and it is where two honest people quote different numbers for the same waste. Waste to energy, incineration with energy recovery, burns waste to produce electricity or heat. It keeps material out of a landfill, so on a pure landfill diversion basis it looks like diversion, and some operators count it that way. But it destroys the material rather than recovering it, and it emits carbon in the process, so the zero waste standards treat it as disposal. The waste hierarchy places energy recovery above disposal but below recycling, which captures the tension exactly: burning waste for energy is better than burying it, and it is worse than recovering the material.

The tool resolves this by showing both numbers rather than picking one for you. With the count energy recovery as diverted toggle off, energy recovery sits in disposal and the reported rate equals the strict zero waste rate. Switch the toggle on and energy recovery moves into the diverted side, and the reported rate rises by the share of your waste that is burned. On the worked example, 850 tonnes diverted with 100 tonnes to waste to energy and 50 to landfill reads 85.0 percent strict and 95.0 percent with the toggle on, a 10 point gap driven entirely by how you classify the 100 tonnes of incineration. Both figures are defensible as long as you label them, and the dishonest move is to quote the 95 without saying it counted burning.

The certification tier always reads from the strict figure, because TRUE, UL 2799, and GRI 306 all exclude energy recovery from diversion. TRUE Zero Waste, run by GBCI, requires at least 90 percent diversion from landfill, incineration, and the environment over 12 months, with waste to energy explicitly not counted as diversion. GRI 306 classifies incineration, with or without energy recovery, as waste directed to disposal under 306-5. So a plant reporting 95 percent by counting incineration would still certify against the strict 85 percent, and would miss the threshold. The rule to carry away is to report the strict diversion for any certification or GRI disclosure, and if you also want to show a landfill diversion figure that includes energy recovery, present it as a separate, clearly labelled number rather than letting it stand in for the certified rate.

Contamination and net diversion

Contamination is the quiet reason a reported diversion rate and a real one drift apart. When you collect recyclables, some fraction of what goes in the bin cannot actually be recovered: the wrong plastics, food-soiled paper, material that jams the sorting line. That fraction is rejected at the materials recovery facility and sent to disposal, so it never left the landfill stream even though it passed through a recycling bin on the way. Counting the full collected weight as diverted overstates the rate by whatever share gets rejected, which is why the honest figure is net diverted, the weight that leaves the facility as a recovered material after the rejects are pulled out.

The tool nets this out with a contamination or reject percentage that applies to your diverted tonnes. Net diverted is the diverted weight times one minus the reject rate, and the rejected weight is added to disposal. On the worked example, 850 tonnes of recyclables with a 10 percent reject rate become 765 tonnes of net diverted, so the real rate is 765 over 1,000, which is 76.5 percent, not the 85 percent the collected weight suggested. That is an 8.5 point swing from a single, ordinary contamination rate, and it is the difference between a number that would survive an audit and one that would not. The lesson is to count what leaves as a sellable bale, not what enters the bin.

Contamination is also a certification limit, not just an accounting adjustment. TRUE caps the contamination a certified facility can carry at 10 percent, which sets a ceiling on how much of a collected stream can bounce back as disposal while the diversion still counts. Reducing contamination is therefore one of the most direct ways to lift a real diversion rate, because it recovers tonnes that were already being collected. Better source separation, clearer signage, and removing the worst-offending materials from the recycling stream all raise net diversion without any new collection at all. Prefer weighbridge tickets for the collected and rejected weights when you can get them, because an estimated reject rate is the softest number in the whole calculation and an audited figure is what a certification will ask for.

Turning volume into weight

Waste is measured in a mix of weight and volume, and the two cannot be added together, so the tool converts everything to weight first. A roll-off container is quoted in cubic yards or cubic metres, a compactor in volume, a weighbridge in tonnes. If you add a container of flattened cardboard measured in cubic metres to a stream of organics measured in tonnes, the answer is meaningless, because a cubic metre of cardboard and a cubic metre of organics weigh very different amounts. The tool solves this by multiplying each volume by a density in tonnes per cubic metre to get a weight, then computing the rate on weight alone.

The default densities are loose, uncompacted values, and they vary enough by material to matter: cardboard 0.05, paper 0.08, plastic 0.03, metal 0.20, glass 0.30, organics 0.55, e-waste 0.20, construction and demolition debris 1.30, and other material 0.15 tonnes per cubic metre. The spread is large on purpose, because a cubic metre of loose plastic film weighs almost nothing while a cubic metre of concrete rubble weighs well over a tonne, and using one average density for everything would throw a mixed-stream rate badly off. Each density is editable on its row, so you can enter the value that matches your material and its compaction rather than trusting a generic default.

Density is the softest input in a volume-based calculation, because it changes with how hard a load is packed. The same cardboard is far denser baled than loose, and a compactor can double or triple the weight per cubic metre of a mixed stream. That is why a volume-to-weight conversion is fine for an internal estimate but a weighbridge weight is preferred for anything audited: TRUE and the other standards require diversion to be proven by weight, and a certified claim built on assumed densities would not hold up. Use the conversion to get streams onto a common basis when you only have volumes, then replace the assumptions with scale tickets before you report externally, and keep the density you used visible so a reviewer can see how each volume became a weight.

Multiple streams and multiple sites

A real operation has more than one waste stream and often more than one site, and the only correct way to combine them is by weight. The tool sums the diverted tonnes across every stream and every site, sums the total tonnes the same way, and divides the two sums to get the combined rate. Adding streams is the easy case, because cardboard, organics, and metal at a single site simply stack into one diverted total and one grand total. Combining sites is where the common mistake appears, because it is tempting to take the diversion rate of each site and average them, and that average is wrong whenever the sites differ in size.

The worked example shows why. Plant A diverts 850 of 1,000 tonnes, an 85 percent rate, and plant B diverts 100 of 1,000 tonnes, a 10 percent rate. Summing the tonnes gives 950 diverted out of 2,000 total, which is 47.5 percent, the true company rate. The simple average of 85 and 10 is also 47.5 here, but only because the two sites happen to be the same size. Change plant B to 10,000 tonnes at the same 10 percent and the weighted rate falls toward 10 percent while the naive average still reads 47.5, a gap of tens of points. Averaging percentages silently weights a tiny site the same as a huge one, which is why it misleads the moment sizes differ, and why the tool always sums tonnes.

The same discipline applies across time and across boundaries. A monthly diversion rate for a year is the sum of the diverted tonnes over the sum of the total tonnes, not the average of the twelve monthly percentages, because a heavy month should pull the annual figure toward its own rate. And the streams you combine have to share a boundary: if you are reporting a company-wide rate, every site and stream inside the reporting boundary belongs in both sums, and a stream you exclude from the numerator has to be excluded from the denominator too. The tool keeps the diverted and disposed tonnes visible next to the rate so you can confirm the tonnes on top and the tonnes on the bottom describe the same operation.

The certification tiers: TRUE and UL 2799

The zero waste tiers put a diversion rate on a recognized scale, and they read from the strict figure that excludes energy recovery. UL 2799, the Zero Waste to Landfill standard, sets three tiers by diversion: Silver at 90 to 94 percent, Gold at 95 to 99 percent, and Platinum at 100 percent, a true zero waste to landfill with nothing buried at all. The tool mirrors this exactly, reporting Platinum at 100 percent, Gold at 95 to 99, Silver at 90 to 94, and a plain under-threshold status below 90. Because the tiers come from the strict rate, a plant that reaches 95 percent only by counting incineration would still sit under the threshold on the number the standard actually uses.

TRUE Zero Waste, the GBCI certification, sets the bar at 90 percent or more diversion from landfill, incineration, and the environment, measured over a rolling 12 months, with energy recovery excluded and contamination capped at 10 percent. The 12-month window matters, because a single good month does not certify a facility; the diversion has to hold across a year of ordinary operation. The contamination cap ties back to net diversion: a facility cannot reach the threshold on a collected weight that is heavily rejected downstream, because the rejected material counts as disposal. TRUE also looks beyond the headline rate to the systems behind it, but the diversion percentage is the gate, and it is the strict, weight-based, contamination-adjusted number this tool computes.

ISO 14001 sits alongside these as the environmental management system standard rather than a diversion threshold. It does not set a diversion percentage, but it expects an organization to measure its waste, set objectives, and improve, and a diversion rate is the natural metric to manage against within it. So the tiers and the management system work together: ISO 14001 gives you the framework to measure and improve, and TRUE or UL 2799 give you the external benchmark to certify against once the rate is high enough. Whichever you pursue, the tonnes-to-90-percent figure the tool reports tells you how much waste you would need to move from disposal into recovery to reach the entry tier, which turns a certification goal into a concrete operational target rather than a vague aspiration.

National context: the United States, Mexico, and Brazil

A diversion rate reads differently against each country’s baseline, so it helps to know where the national numbers sit. In the United States the framework is the EPA’s Sustainable Materials Management approach, and the EPA publishes volume-to-weight conversion factors that underpin any volume-based estimate. The EPA WARM tool exists too, but it is a greenhouse gas model for comparing waste management options rather than a diversion calculator, so it answers a different question. The national anchor is the EPA’s last full municipal solid waste dataset, for 2018, which put the combined recycling and composting rate at 32.1 percent, with roughly half of municipal waste landfilled, plastics recycled at about 8.7 percent, and construction and demolition debris recovered at around 75 percent by mass. Against a national rate near a third, a facility at 85 or 90 percent is far ahead of the average, which is what a certification is meant to recognize.

Mexico runs on the LGPGIR, the general law for waste prevention and management, which splits waste into municipal solid waste, or RSU, special handling waste, or RME under NOM-161, and hazardous waste, or RP, at the federal level. Keep hazardous RP out of the municipal RSU denominator, because mixing waste classes distorts the rate. The important nuance for Mexico is that the LGPGIR’s definition of valorizacion legally can include valorizacion energetica, energy recovery, which is exactly the thing TRUE excludes. That clash is why the energy toggle matters most in Mexico: a rate that is legitimate under national law can be built on incineration that a zero waste certification will not count. CDMX adds NADF-024-AMBT for source separation. The national picture from the DBGIR 2026 diagnosis by SEMARNAT is a large gap to close: about 139,902 tonnes a day generated, only around 5 percent treated, 72 percent with no valorization at all, roughly 40.15 percent organic by composition, and historically under 10 percent recycled.

Brazil works under the PNRS, the national solid waste policy in Lei 12.305/2010, which sets the waste hierarchy and reverse logistics, or logistica reversa, for specific product streams. NBR 10004 classifies waste as Classe I, hazardous, and Classe II, non-hazardous, and Classe I should stay out of the recoverable base the same way hazardous RP does in Mexico. The Novo Marco do Saneamento, Lei 14.026/2020, pushed the end of open dumps, the lixoes, toward properly engineered disposal, and recovery in Brazil runs heavily through coleta seletiva and the catador cooperatives. The caution the national data carries is that offering selective collection is not the same as achieving recycling: the ABREMA and ABRELPE Panorama 2024 reports around 81.6 million tonnes a year, roughly 40 percent still going to inadequate disposal, effective recycling in the low single digits at about 2 to 4 percent, and organics near 45 percent of the municipal stream. In all three countries the biggest, heaviest lever toward a higher diversion rate is the organic fraction.

Five worked examples

Example 1: the base rate and the gap to 90 percent

This one shows the whole method on a single site. A plant generates 1,000 tonnes of waste, diverts 850 through recycling, composting, and reuse, and landfills the remaining 150. The diversion rate is 850 divided by 1,000, which is 85.0 percent. That is a strong rate, but it is 50 tonnes short of the 90 percent TRUE threshold, because reaching 90 percent would mean diverting 900 of the 1,000 tonnes, and the tool reports that 50-tonne gap directly. The lesson is that diversion equals diverted over total, and that the tool turns a certification target into a concrete number of tonnes: you do not need a vague push toward zero waste, you need to move 50 specific tonnes out of landfill and into recovery.

Example 2: does incineration count?

This case shows the toggle that moves the number most. Keep the same 850 tonnes diverted, but now split the remaining 150 so that 100 tonnes go to waste to energy and only 50 go to landfill. With the strict zero waste definition the rate stays 85.0 percent, because incineration is disposal and the 100 tonnes of energy recovery do not count as diverted. Switch on count energy recovery as diverted and the reported rate reads 95.0 percent, since those 100 tonnes now sit on the diverted side. The two numbers describe the very same waste and differ by 10 points purely on classification. The lesson is that TRUE and GRI 306 use the strict 85.0, so report that for any certification, and if you also quote the 95.0 landfill diversion figure, label it plainly as one that includes burning.

Example 3: contamination nets it down

This case shows why collected weight is not diverted weight. You collect 850 tonnes of recyclables, but 10 percent of it is rejected at the materials recovery facility as contaminated. Net diverted is 850 times 0.90, which is 765 tonnes, and the 85 tonnes of rejects move into disposal. The real diversion rate is 765 divided by 1,000, which is 76.5 percent, not the 85 percent the collected weight suggested. A single ordinary contamination rate pulled the number down by 8.5 points. The lesson is to count what leaves the facility as a sellable bale, not what went into the bin, and to remember that TRUE caps contamination at 10 percent, so a heavily contaminated stream can fail a certification even when the collected tonnage looks strong.

Example 4: turning volume into weight

This case shows why you cannot mix units. A roll-off holds 40 cubic yards of flattened cardboard, and another stream is measured in tonnes. You cannot add cubic yards to tonnes, so the cardboard has to be converted first using its density, which the tool does with an editable tonnes-per-cubic-metre value once you switch the input unit to volume. Only after every stream is on a weight basis does the rate mean anything. The lesson is to always compute diversion on weight and never mix volume and weight in the same total. Because density changes with compaction, treat a volume-based figure as an estimate and replace it with a weighbridge weight before an audited report, since the certifications require diversion to be proven by weight.

Example 5: combining sites the right way

This case shows the aggregation trap. Plant A diverts 850 of 1,000 tonnes, an 85 percent rate, and plant B diverts 100 of 1,000 tonnes, a 10 percent rate. The company rate is the sum of the diverted tonnes over the sum of the total tonnes, 950 over 2,000, which is 47.5 percent. The simple average of 85 and 10 also comes to 47.5 here, but only because the two sites are the same size; the moment they differ, the average misleads, because it weights a small site the same as a large one. The lesson is to sum the tonnes and then divide, never to average site percentages, and to apply the same rule across months when you build an annual rate: add the tops, add the bottoms, and divide once.

Three expert tips

Show the strict and the loose diversion together

Report the strict zero waste diversion for anything that certifies or discloses, because energy recovery is disposal under TRUE, UL 2799, and GRI 306. If you also want to quote a landfill diversion figure that counts waste to energy, present it as a separate number and say plainly that it includes incineration, rather than letting it stand in for the certified rate. The worked example makes the stakes clear: the same waste reads 85.0 percent strict and 95.0 percent with energy recovery counted, a 10 point gap that decides whether you meet the 90 percent threshold. Show both numbers side by side, label each for what it is, and read the certification tier from the strict figure the way the standards do, so a reviewer never has to guess whether your headline rate counted burning.

Subtract contamination and weigh, do not estimate

Net diverted is what leaves the facility as a recovered material after the rejected loads are pulled out, so subtract the contamination before you form the rate rather than counting the full collected weight. A 10 percent reject rate turned 850 tonnes of collected recyclables into 765 tonnes of net diversion in the example, moving the rate from 85 to 76.5 percent, and TRUE caps contamination at 10 percent for the same reason. Convert any volume to weight with the material density so streams are comparable, and prefer weighbridge tickets over assumed densities and estimated reject rates whenever you can, because those are the softest numbers in the whole calculation. An audited claim needs diversion proven by weight, so use the estimates to plan and the scale tickets to report.

Aim up the hierarchy and combine sites by weight

Reduction and reuse sit above recycling on the waste hierarchy, so the waste you never generate and the material you reuse both lift diversion without ever passing through a bin. To close the gap to 90 percent, look at organics first, because they are the largest and heaviest stream in Mexico and Brazil and often in the United States too, and composting or digesting them moves more tonnes than any tweak to a cardboard stream. When you roll up several sites, sum the diverted tonnes and the total tonnes and then divide, never average the site percentages, because the average silently weights a tiny site the same as a huge one and misleads the moment their sizes differ. The tool reports the tonnes needed to reach 90 percent so the target is a concrete quantity of waste to redirect, not an abstract aspiration.

Common mistakes to avoid

The first mistake is counting energy recovery as diversion without saying so. Waste to energy keeps material out of a landfill, but it is disposal under every zero waste standard, so a rate that folds it in silently reads far higher than the certified figure and will not survive an audit. Report the strict diversion and label any landfill diversion figure that includes incineration. The second mistake is counting collected weight instead of net diverted weight, which ignores the material rejected at the sorter as contamination; a 10 percent reject rate alone can move a rate by more than eight points, so subtract the rejects and move them into disposal.

A third mistake is averaging site percentages instead of summing tonnes, which weights a small site the same as a large one and produces a company rate that looks reasonable but is wrong whenever the sites differ in size. Sum the diverted tonnes and the total tonnes across sites and months, then divide once. A fourth is mixing volume and weight in the same total, adding cubic metres of one stream to tonnes of another; convert every volume to weight with a density first, and prefer a weighbridge weight for anything audited because density shifts with compaction. A fifth is treating the estimate as a certified claim: the tool follows the waste hierarchy and GRI 306 and reflects the TRUE and UL 2799 thresholds, but a certification needs weighbridge evidence over 12 months and a qualified reviewer. Show both diversion figures, net out contamination, sum by weight, keep units consistent, and validate before you certify, and the rate will hold up.

Where this calculator fits

It suits anyone who has to report or improve the waste side of a sustainability program and has the tonnages to build it. A sustainability or ESG lead can take a year of waste records, enter each stream by destination, read the strict and reported diversion rates with the tier and the gap to 90 percent, and produce a defensible figure for a GRI 306 disclosure or a TRUE application. A facilities or operations manager can size a single site or a single stream to see where the disposal tonnes actually are before planning a change, which is usually the organic fraction. A compliance analyst can use the transparent, weight-based method to prepare an estimate for review before a certified claim is filed.

This is the waste tool of the ESG and Compliance set, and it sits next to the carbon calculators that measure emissions. For the two scopes a company controls directly, the Scope 1 and 2 Carbon Footprint calculator builds the combined total from your fuels and your electricity. The Electricity CO2e calculator sizes a single meter against the grid factor on the Scope 2 side, and the Fuel Combustion CO2e calculator does the same for the fuel you burn on the Scope 1 side. To normalize any of those totals against revenue, units, or floor area, the Carbon Intensity calculator turns a raw figure into a comparable ratio. Together they cover the emissions and waste that a disclosure asks for.

The result also points to where the effort goes. If your diversion rate is well below 90 percent, the largest and heaviest disposal stream is where the gains are, and in most operations that is organics, diverted by composting or digestion rather than by recycling. If you are already near the threshold, contamination is usually the thing standing between the collected weight and the certified rate, so tightening source separation recovers tonnes you are already collecting. For the wider picture of using less energy and running an operation more efficiently in the first place, the Energy Management hub covers efficiency in more depth, and the ESG and Compliance hub gathers the full set of disclosure tools. Measure the diversion here, find where the disposal tonnes are, and move the ones that count.

Frequently asked questions

Sources, disclaimer, and editorial transparency

The relationships used here are standard waste accounting under the waste hierarchy and GRI 306: Waste 2020. Diversion rate = diverted weight divided by total waste weight, times 100, where total = diverted + energy recovery + landfill. The strict zero waste diversion always excludes energy recovery, which GRI 306-5 classifies as waste directed to disposal, and the certification tier reads from that strict figure. Net diverted = diverted weight times one minus the reject rate, with rejected material counted as disposal; volume inputs convert to weight with loose densities in tonnes per cubic metre (cardboard 0.05, paper 0.08, plastic 0.03, metal 0.20, glass 0.30, organics 0.55, e-waste 0.20, construction and demolition debris 1.30, other 0.15), each editable; and multiple sites combine by summing tonnes rather than averaging percentages. The tiers follow UL 2799 (Silver 90 to 94, Gold 95 to 99, Platinum 100) and TRUE Zero Waste (GBCI, at least 90 percent over 12 months, energy recovery excluded, contamination capped at 10 percent), with ISO 14001 as the management system. National anchors are cited from the US EPA Sustainable Materials Management data (2018 municipal recycling and composting 32.1 percent), the SEMARNAT DBGIR 2026 diagnosis for Mexico, and the ABREMA and ABRELPE Panorama 2024 for Brazil. The worked numbers are computed from the inputs shown: 850 of 1,000 is 85.0 percent, 50 tonnes short of 90 percent; with 100 tonnes to energy recovery the strict rate stays 85.0 and the reported rate is 95.0; a 10 percent reject rate nets 850 to 765 for 76.5 percent; and plants at 850 of 1,000 and 100 of 1,000 combine to 950 over 2,000, which is 47.5 percent. This calculator and guide are built and reviewed by the OpsCalculators team; see our Editorial Policy for how each tool is researched, built, and tested.

Results are accurate for the formula and the factors above, and they are a management estimate, not a certified claim. The tool computes diversion from the tonnages you enter and cannot know every detail of your operation or the exact requirements of a given certification; a TRUE application needs at least 90 percent diversion proven by weighbridge evidence over a rolling 12 months, with contamination under 10 percent and a qualified reviewer, and a GRI 306 disclosure needs your audited tonnages by destination. Report the strict diversion for any certification and label any landfill diversion figure that includes incineration, net out contamination, convert volume to weight before combining streams, and sum tonnes across sites rather than averaging percentages. See our full Disclaimer. OpsCalculators.com is operated by MAFHH INTERNATIONAL LTD. Your inputs are processed in your browser and are never stored; see our Privacy Policy.