The Rewear Calculator
Fashion Footprint Calculator: what is that piece really worth?
Pick something from your wardrobe. Drag the slider. Watch what happens when you wear it instead of replacing it.
Every garment carries a footprint — the carbon and water it took to make, paid in full before you wear it once. This free fashion footprint calculator turns that into three numbers you can act on: what the piece costs you per wear, and the water and CO₂ behind the replacement you don't buy. Rewearing is the single biggest lever you have, and this shows you why.
Cost per wear
across 104 wears in its life
Wearing these instead of replacing them:
per one purchase avoided — modelled, not measured.
WRAP measured that resale displaces a new purchase about 65% of the time, so in practice it is usually less than one.
≈ 2,235 kettle boils of water, and 83 miles you didn't have to drive.
Closet Remix does this for every piece you own — automatically, every time you wear it.
Why this works — the research →
How we work it out: cost per wear is price ÷ wears. Environmental figures use published lifecycle estimates for producing one new garment of each type; rewearing spreads that footprint and displaces the need for a replacement. Figures are estimates — the app tracks your real numbers, per item, over time.
Common questions
What is a fashion footprint?
It's the environmental cost of a garment — chiefly the carbon emitted and the water used to grow, make, dye and ship it. A pair of jeans takes thousands of litres of water before you've worn it once. That cost is paid at the point it is made, so the way to avoid it is not to need another one: wear what you own for its full life and that is one garment's footprint that never has to happen. This calculator shows how close you are to that, and what the piece costs you per wear along the way.
How is the calculation worked out?
We take a typical production footprint for the garment type you pick — the CO2 and water it takes to make one new one — and multiply it by the share of one garment lifetime you have used, which is your total wears against a typical lifetime for that garment. That share is capped at one, so the most the tool will ever show is the footprint of a single garment: the figures are impact per one purchase avoided, not a measurement of emissions saved. Cost per wear is separate and straightforward — the price you paid divided by your total wears. The production figures are indicative estimates for a garment type, not a certified assessment of your specific garment, and the typical-lifetime wear counts are our own working assumptions rather than a published dataset. No online tool can be more than that, and we won't pretend otherwise.