Free interactive tool
Carbon Footprint Estimator
Three habits in tons of CO₂ — find your biggest lever before choosing your swaps.
Weigh three habits in tons of CO₂
Slide driving and flying, pick a diet; the bar shows each habit's share against a ~2-ton climate target.
Footprint arithmetic is rough but honest at the scale of decisions: it reliably ranks which changes are big levers and which are rounding errors.
- Find your biggest lever and halve it — what did it buy?
- Try to reach the 2-ton line — which habit had to move most?
Footprint arithmetic is rough but honest at the scale of decisions: it reliably ranks which changes are big levers and which are rounding errors. Driving, flying, and diet cover most personal variation.
The bar splits your total against a ~2-ton climate-compatible target. Find the biggest segment first — effort spent there beats perfection everywhere else.
What's the single biggest lever?
For frequent flyers, flights; otherwise usually car kilometers or a meat-heavy diet.
How exact are these numbers?
They're typical published factors, rounded — a compass for decisions, not an audit.