Quick answer
Recycling rate = recycled ÷ total waste × 100. Diverting 120 of 400 units of waste is a recycling rate of 30%, leaving 280 not recycled.
Enter the amount recycled or diverted and the total waste generated. The calculator returns the rate and the amount not recycled.
Related tools: Carbon Footprint Estimate Calculator: Annual greenhouse-gas emissions from driving, home electricity and natural gas using US EPA emission factors. Tree Carbon Uptake Estimate Calculator: Carbon dioxide removed by planted tree seedlings and by forest land, using US EPA factors. Flow Rate Calculator: Volumetric flow rate from area and velocity, or volume and time.
How to use the Recycling Rate Calculator
- Enter recycled or diverted (0 or more).
- Enter total waste generated (above 0).
- Press Calculate to see the result, and use Reset to start again.
| Input | What to enter | Allowed values |
|---|---|---|
| Recycled or diverted | A number | ≥ 0 |
| Total waste generated | A number | > 0 |
Formula and method
Formula
rate = recycled ÷ total × 100
IEEE-754 double precision; shown to the decimals indicated.
Use the same unit for both amounts.
Worked examples
These examples are verified: each one is an automated test case that the live calculator must reproduce exactly.
Example 1
Inputs: Recycled or diverted = 120; Total waste generated = 400.
| Result | Value |
|---|---|
| Recycling rate | 30% |
| Not recycled | 280 |
Example 2
Inputs: Recycled or diverted = 35; Total waste generated = 35.
| Result | Value |
|---|---|
| Recycling rate | 100% |
| Not recycled | 0 |
Example 3
Inputs: Recycled or diverted = 0; Total waste generated = 50.
| Result | Value |
|---|---|
| Recycling rate | 0% |
| Not recycled | 50 |
The first line is the headline result (recycling rate). Below it the recycling Rate Calculator lists not recycled, which describe the same case from other angles. IEEE-754 double precision; shown to the decimals indicated.
Putting 30% in context
The US EPA reports a national recycling and composting rate of about 32% of municipal waste. Many European countries exceed 50%. Use the same units (kg, tons) for both inputs.
Defining the numerator
Count what is actually recycled, not just collected; contamination can send part of the collected material to landfill. Diversion rates may include composting. Recycled cannot exceed total.
How the result changes with recycled or diverted
Holding every other input at the first worked example, this table changes only recycled or diverted. It shows how sensitive the answer is to that one value; each row was produced by running this calculator.
| Recycled or diverted | Recycling rate | Not recycled |
|---|---|---|
| 60 | 15% | 340 |
| 120 | 30% | 280 |
| 240 | 60% | 160 |
What happens with invalid input
These messages are produced by the calculator itself, so you know what to fix.
- Recycled or diverted: entering "60" shows "Recycled waste cannot exceed total waste." beside that field and no result.
- Total waste generated: entering "0" shows "Total waste generated must be greater than 0." beside that field and no result.
Choosing between the Recycling Rate Calculator and similar calculators
Each row shows what a related calculator on this site asks for and what it returns, so you can pick the one that matches your question.
| Calculator | You enter | It returns |
|---|---|---|
| [Carbon Footprint Estimate Calculator](/science/carbon-footprint-estimate-calculator/) | miles driven per year, electricity used per year and natural gas used per year | Estimated emissions |
| [Tree Carbon Uptake Estimate Calculator](/science/tree-carbon-uptake-estimate-calculator/) | urban tree seedlings planted and grown for 10 years, acres of US forest and years of forest growth | Carbon dioxide removed |
| [Flow Rate Calculator](/science/flow-rate-calculator/) | use | Flow rate |
| [Interest Rate Calculator](/finance/interest-rate-calculator/) | loan amount, monthly payment and term | Interest rate (APR) |
| [Cap Rate Calculator](/real-estate/cap-rate-calculator/) | net operating income and property value | Cap rate |
Background: environment and acoustics
Decibels are a logarithmic scale, so sound levels cannot be added arithmetically: two equal sources raise the level by about 3 dB, not double it. Environmental and emissions results depend on the factors behind them (for example the US EPA's equivalency factors), which are averages for a country, fuel and year.
Use the result to compare scenarios rather than as a measured value.
Assumptions and limitations
- Recycled cannot exceed total
If a required value is empty, not a number, or outside its allowed range, the form marks that field with a message and shows no result instead of a misleading number. The automated checks deliberately try invalid entries for recycled or diverted and total waste generated to confirm this.
Frequently asked questions
How do I raise my rate?
Sort better and add composting.
What is a diversion rate?
The share kept out of landfill.
Is this for businesses or households?
Either: it works for a household, a business or a city, as long as recycled and total waste use the same unit.
What does the Recycling Rate Calculator calculate?
Share of waste that is recycled or diverted. It returns Recycling rate and Not recycled.
What formula does the Recycling Rate Calculator use?
rate = recycled ÷ total × 100. Use the same unit for both amounts.
What do I need to enter in the recycling Rate Calculator?
You enter Recycled or diverted and Total waste generated.
How is the result rounded or limited?
IEEE-754 double precision; shown to the decimals indicated. Recycled cannot exceed total.
What is an example of a recycling Rate result?
With recycled or diverted 120 and total waste generated 400, the recycling rate is 30%.
Related calculators
- Carbon Footprint Estimate Calculator — Annual greenhouse-gas emissions from driving, home electricity and natural gas using US EPA emission factors.
- Tree Carbon Uptake Estimate Calculator — Carbon dioxide removed by planted tree seedlings and by forest land, using US EPA factors.
- Flow Rate Calculator — Volumetric flow rate from area and velocity, or volume and time.
- Flow Rate Converter — Convert litres, gallons and cubic metres or feet per second, minute and hour.
Sources
- OpenStax, University Physics Volume 1 (Rice University): mechanics
Content last reviewed 2026-11-04. Formulas and worked examples are checked by automated tests against independently computed values.