Greenhouse Gas Savings from Home Composting Calculator
Diverting organic waste from landfill reduces methane production. Enter your weekly composted waste to estimate annual CO2-equivalent emissions avoided and see it translated into everyday terms like car miles.
About this calculator
Estimate how much methane and CO2-equivalent emissions you avoid each year by composting food scraps and yard waste instead of sending them to landfill.
Frequently Asked Questions
Why does food waste have a higher emissions factor than yard waste?
Food waste is wetter and decomposes anaerobically faster in landfills, producing more methane, a potent greenhouse gas, compared to woodier yard waste which decomposes more slowly.
Is this an exact scientific measurement?
No, this uses widely cited average emission factors for estimation purposes. Actual results vary based on landfill conditions, waste composition, and local methane capture systems.
Does composting have other benefits beyond emissions?
Yes — compost improves soil health, reduces the need for synthetic fertilizer, and reduces landfill volume and transportation costs.