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Sustainable Style

Clothing Footprint Calculator

See the hidden cost of a year's shopping. Enter how many new garments you buy and this tool estimates the water and carbon footprint behind them, and shows how buying less and wearing longer changes the picture.

How many new items do you buy in a typical year?

Water footprint / year
77,100 L

About 514 full bathtubs, or 105.6 years of one person's drinking water.

Carbon / year
257 kg CO₂e
≈ driving
1,428 km
New items / year
18
Per item avg
14 kg

Figures are rough per-garment averages from widely cited industry estimates (production water and lifecycle carbon). Buying less and wearing each item twice as long roughly halves this, the single biggest lever you have.

Why clothes have such a big footprint

Making clothes is resource-hungry. A single cotton t-shirt can take around 2,700 litres of water to produce, roughly what one person drinks in three years, while a pair of jeans can run to 7,500 litres once you include growing and processing the cotton. Add dyeing, shipping and the energy behind it all, and every new garment carries a measurable carbon cost too.

How we estimate your footprint

We multiply the number of items you buy by widely cited per-garment averages for production water and lifecycle carbon, then translate the totals into everyday terms, bathtubs of water and kilometres driven, so the numbers mean something. They're approximations, not a lab measurement, but they're good enough to compare habits.

The one change that matters most

You don't have to buy nothing. The biggest lever is keeping clothes in use longer: extending a garment's life from one year to two can roughly halve its annual footprint. Buying better, wearing more and repairing beats buying more and binning.

  • Run new buys through the 30 wears test.
  • Build a cohesive capsule so you shop less by design.
  • Choose quality and care for it, wash cooler, line-dry, repair.
  • Buy second-hand and pass things on rather than throwing them away.

Frequently asked questions

How much water does it take to make a t-shirt?

Commonly cited estimates put a single cotton t-shirt at around 2,700 litres of water across growing and processing the cotton, about three years of one person's drinking water.

Are these footprint numbers exact?

No, they're rough per-garment averages from industry estimates and vary by fabric, country and factory. Use them to compare choices and track your habits, not as a precise measurement.

What's the best way to lower my fashion footprint?

Buy less and wear each item longer. Extending a garment's life, buying second-hand, and caring for clothes so they last all cut the footprint far more than switching between 'eco' new items.

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