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Sustainable Style

30 Wears Calculator

The simplest question in sustainable fashion: will you wear it at least 30 times? Enter a price and an honest wear estimate to run the #30wears test, see the cost per wear, and decide whether a purchase truly earns its place.

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The #30wears rule asks one question before you buy: will I wear this at least 30 times? If not, it's usually a pass.

The 30 wears test
Think again

12 wears falls short of 30, can you commit to more?

Cost per wear at 30
$2.00
At your estimate
$5.00

To hit 30 wears in a year you'd wear it about 2.5 times a month. Pieces that fit your life, and your colour palette, get there easily.

Where the 30 wears rule comes from

Popularised by campaigners Livia Firth and Lucy Siegle, the #30wears challenge is a single pause before buying: picture yourself wearing the item at least thirty times. If you can't, it probably isn't the right purchase. It's the easiest habit in sustainable fashion, and one of the most effective.

Why 30 is the magic number

Thirty wears is roughly the threshold where a garment's environmental cost starts to pay off and its cost per wear drops to something sensible. Research into extending garment life suggests keeping clothes in use longer is one of the biggest levers an individual has to cut fashion's footprint.

Make the test honest

  • Picture the specific outfits and occasions, not a vague "sometime".
  • Beware one-event buys: they almost always fail the test.
  • Versatile basics in your colours pass easily; novelty trends rarely do.

If an item passes, check its longer-term value with the cost per wear calculator, and see its wider impact with the clothing footprint calculator.

Frequently asked questions

What is the 30 wears rule?

It's a sustainable-shopping habit: before buying, ask whether you'll wear the item at least 30 times. If the answer is no, you skip it. It cuts impulse buys and steers you toward versatile, long-lasting pieces.

Does cost per wear matter if it passes?

Yes, 30 wears is the minimum bar, not the goal. The more you wear something beyond 30, the lower its cost per wear and footprint. Everyday staples can reach hundreds of wears.

What about special-occasion clothes?

Occasion pieces often fail the 30 wears test, which is a sign to rent, borrow, buy second-hand, or choose something you'd genuinely re-wear rather than a single-use outfit.

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