Free tools
Measure it before you change it.
Three calculators that turn vague eco-guilt into numbers you can check. No signup, nothing leaves your browser, every formula shown and every factor sourced to the EPA, OECD, and peer-reviewed LCAs.
01Calculator
Plastic Footprint Calculator
Add up the bottles, bags, cups and cutlery you go through and see the annual weight, plus how little of it is actually recycled.
Formula
Open toolΣ ( items per week × grams each ) × 52 weeks
02Calculator
Reusable vs. Disposable Calculator
A reusable starts in debt: it costs more to buy and more to make. See how many uses it takes to come out ahead on both.
Formula
Open toolbreak-even uses = reusable cost ÷ disposable cost per use
03Calculator
Food Waste Footprint Calculator
Estimate your household’s yearly food waste, the methane it makes in a landfill, and what composting it instead would save.
Formula
Open toollandfill CO₂e = food waste (kg) × 0.74 kg CO₂e per kg