Cost per wear is the one piece of wardrobe arithmetic that has escaped into general use. Divide the price by the number of times you wear it; a £300 coat worn 200 times costs £1.50 a wear, which is less than a £40 coat worn 10 times at £4.00.
The logic is sound. The way it is normally applied is not, because it is almost always run forward as a justification rather than backward as a measurement.
The forward version is a wish
Standing in a shop, you do not know how many times you will wear something. What you have is an estimate, and estimates made while holding a garment you already want are not neutral. The number you pick is the number that makes the purchase defensible.
The honest version runs backwards, on clothes you already own. Take five things you bought over a year ago, estimate the wears as accurately as you can, and divide. The results are usually uncomfortable, and far more instructive than any forward projection, because they tell you something specific about your estimation error rather than about clothes in general.
Most people discover the same two things: the boring purchases massively outperformed the exciting ones, and a handful of items have a cost per wear that is effectively infinite.
If you keep any record of what you actually wear — an app, a note, a photo roll you can scroll — use it rather than your memory. Recalled wear counts are biased toward the clothes you like remembering.
The first missing term: replacement
The standard calculation treats wears as unlimited. They are not. A cheaply made shirt might be structurally finished at 40 wears; a well-made one might go 300. So the comparison is not price against wears, it is price against achievable wears — and the cheap option often cannot reach the number the calculation assumes.
| Item | Price | Realistic lifespan | Cost per wear |
|---|---|---|---|
| Fast-fashion knit | $35 | ~30 wears | $1.17 |
| Mid-market merino | $140 | ~250 wears | $0.56 |
| The same merino, worn twice | $140 | 2 wears | $70.00 |
The third row is the important one. Quality lowers cost per wear only if the wears actually happen. An expensive garment you do not reach for is not an investment that is slowly maturing; it is the worst purchase on the list.
The second missing term: what it displaces
Every garment occupies a slot — a rail space, a drawer, and more importantly a place in your decision-making. When you are choosing what to wear, more options do not reliably produce better outfits; past a certain point they produce slower decisions and more defaulting to the same three things.
This means a garment that is merely fine has a real cost even at zero price. It sits in the space where a piece you would actually reach for could be, and it adds friction every morning without adding an outfit. The clothes worth keeping are not the ones that clear the bar of “nothing wrong with it”; they are the ones that beat what they displace.
What the number is actually good for
Cost per wear is a poor tool for deciding whether to buy something and an excellent one for two other jobs.
- Calibrating your own forecasting. Compare what you predicted against what happened, repeatedly, and you will find your personal error — most people overestimate wears on statement pieces by a factor of five or more and underestimate on plain ones.
- Deciding what to let go of. A garment whose cost per wear has stopped falling is one you have stopped wearing. That is a cleaner signal than trying to remember whether you like it.
There is one useful forward application, and it is a constraint rather than a justification: set the wear count first, before you look at the price. Decide that a coat needs to be worn thirty times a year for three years. Then ask, honestly, whether this particular coat is one you would reach for ninety times. The order matters, because deciding the threshold before you see the object is the only way to keep the object from setting the threshold.