carboncost.me

Smaller: this many have the same footprint as yours

Bigger: this many of yours make one

Break-even

Common questions

† Food and drink are counted as bought: everything from the farm to the shop, including food lost or thrown away along the way. Food you throw away at home is included too, since you bought it. Cooking is not.

CO₂e (CO₂-equivalent) counts all greenhouse gases, not just CO₂, as the amount of CO₂ that would warm the planet as much. Every figure links to at least one published source. “Average” shows the average; where sources disagree about it, it shows the spread of their averages. “Range” shows the least to the most possible footprint, from the best case to the worst. Change the amount and how often to compare a yearly total. “Once” shows just that amount. Break-even lines show how many uses it takes for a switch to save the emissions of making it. The grey line under each item shows its footprint on a log scale. “Confidence” says how well the sources agree. Faded items have low confidence or only one source, so they are left out of the comparisons.