What is cost per wear? The one number that fixes how you buy clothes

The average wardrobe is a graveyard of good intentions. The numbers from the circular-fashion research are blunt, and the cure is a single division: what it cost, divided by how often it left the house. Here is the formula, what counts as a good number, and how to keep the count without a spreadsheet.

What is cost per wear?

Cost per wear is the price of a garment divided by the number of times you have worn it. A £190 jacket worn twice has cost £95 a wear so far. A £120 pair of shoes worn 61 times has cost £2 a wear. The number falls every time the piece leaves the house, which is the whole point: it measures what a garment has done for you, not what it cost on the day.

The formula is trivial. The hard part is the denominator, because nobody knows how many times they have worn anything. That is why the number is rare in practice and why the research on wardrobes looks the way it does.

The utilisation collapse

The Ellen MacArthur Foundation's A New Textiles Economy found that the number of times a garment is worn before being discarded fell 36% in fifteen years, while production doubled. Under-use and lack of recycling cost the industry more than USD 500 billion a year in lost value. In the UK, WRAP's 2022 survey counted 118 items in the average adult's wardrobe, 31 of them unworn for at least a year: 1.6 billion garments doing nothing.

Put those together and the typical closet is a stock of expensive, rarely used assets. Nobody would run a kitchen or a tool shed that way, and the reason people run a wardrobe that way is that the usage is invisible.

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How to calculate cost per wear: a worked example

Take the price you paid, including alterations. Count the wears, or estimate them honestly. Divide. Then do the one step most guides skip: project it forward.

The last column is the useful one. It asks whether the jacket will plausibly be worn 63 times before it goes out of style or out of fit. If the answer is no, the jacket was a mistake, and the next jacket should be a different one or none at all.

What is a good cost per wear?

There is no universal threshold, because a wedding suit and a running top live on different scales. Two rules of thumb are widely used. Livia Firth's Eco-Age campaign asks a single question before buying: will I wear it a minimum of 30 times? The other is the coffee rule: anything below the price of a coffee a wear has earned its keep.

The more useful comparison is inside your own closet. Rank everything you have priced from cheapest to dearest per wear. The top of the list tells you what to buy more of; the bottom tells you what to stop buying, and it is almost never what you expected.

Why cost per wear changes behaviour

A £190 jacket worn twice cost £95 a wear. A £120 pair of shoes worn 61 times cost £2. Put those two numbers next to each other and the expensive purchase is obviously the shoes, and the cheap one is the jacket. The number reframes value from the price tag to the life of the item, which is the only frame in which buying fewer, better things is rational rather than virtuous.

It also exposes the gaps that drive the waste: the "nothing formal" that leads to a panic buy, the "no outerwear" that makes the cold-weather pieces unwearable. The same mechanism is at work with the subscriptions you forgot: small recurring costs that feel free until somebody divides them by the use they get.

Keeping the ledger without spreadsheets

The reason nobody tracks cost per wear is that it requires logging what you wore. Logging is the part that fails. It works only if the log is a by-product of something you wanted anyway: an outfit you chose in the morning and marked as worn at night, with a reminder, becomes a wear count without a spreadsheet.

That is also the argument for photographing the closet once rather than tidying it again. A photographed wardrobe is a list; a list can carry a price and a counter; a counter divided by a price is the number this article is about. The outfit planner apps that track cost per wear all work this way, and the ones that make logging a two-tap habit are the ones where the number ever gets filled in.

Using the number when you shop

• Before buying, estimate the wears for the next two years. Under 30 is a rental, not a purchase.
• Prefer a gap over a duplicate. The fourth navy knit starts at a high cost per wear because the other three absorb the wears.
• Buy the pieces that your ranking says you wear to death, in the colours that already go with everything; a capsule built on two neutrals and one accent keeps every piece in rotation.
• Re-rank twice a year. The piece that was a mistake in January is sometimes a staple by July, and vice versa.

How PeakClothes keeps it

Add prices to the pieces you care about; every outfit you log increments the wear counts; the Cost per wear screen ranks the pieces earning their keep and the ones that are not. Shopping gaps flag the missing category so the next purchase is a wearer, not another jacket.

Hen Eytan · Founder, UPeak

Builds the UPeak apps and writes up the research behind them.