Cost Per Wear Is the Only Number That Compares Two Coats
A ninety dollar coat and a four hundred dollar coat are not comparable on price. They are comparable on cost per wear, which is the one figure that makes an expensive purchase arguable rather than indulgent.
The short version
Cost per wear is the price divided by the number of times you realistically wear something before it goes. It is the only figure that makes a cheap piece and an expensive one comparable. A four hundred dollar coat worn twice a week for four winters costs about a dollar a wear; a ninety dollar coat replaced each year costs more.
Two coats. One is ninety dollars, one is four hundred. On any shopping list ever written, the ninety dollar coat wins, because a list compares the only number it holds and that number is the price.
The comparison is wrong, and everyone knows it is wrong, and almost nobody does the other one because the other one requires a field that no shop provides.
The arithmetic
Cost per wear is the price divided by the number of times you will realistically wear the thing before it leaves your wardrobe. That is the whole method.
The four hundred dollar wool coat, worn four days a week for five winter months across four years, is about eighty wears a year and three hundred and twenty over its life. That is roughly a dollar twenty five a wear.
The ninety dollar coat, in a fabric that pills by February, worn the same amount for one winter, is eighty wears. That is a dollar twelve a wear.
Which is to say: it depends, and it depends on something specific rather than on a general principle about quality. The expensive coat wins if it lasts four years. If you get bored of it in one, it loses badly. The honest version of this calculation includes your own history with clothes, which is why it cannot be outsourced to a rule of thumb.
Where it stops working
Cost per wear is a tool, not a religion, and it fails in three specific places.
Occasion wear. A wedding outfit worn twice has a terrible cost per wear and may still be the right purchase. Some things are bought for the occasion rather than for the wardrobe, and forcing them through this calculation just produces a number that makes you feel bad.
It rewards buying nothing. Taken to its conclusion, the cheapest cost per wear is wearing what you already own forever. That is a fine outcome and not what the calculation is for. It is for choosing between two things you have already decided to buy one of.
It cannot see fit. A coat you love and reach for has a wear count you cannot predict from the price. Fit and how something makes you feel are the actual drivers of wear count, and they are not on any spec sheet. The calculation formalises a guess; it does not replace one.
The apps that already do this, and where they stop
Worth being straight about: Stylebook and Whering both calculate cost per wear, and have for years. Stylebook has the deeper analytics of the two, Whering the better free tier. If you want the number for clothes you already own, wear logging in either of them will give it to you more accurately than any estimate, because it counts real wears instead of guessing at them.
They stop at the wardrobe door. Both are built around garments you have, which is the right design for a closet app and the wrong one for the decision this article is about: two coats, neither of them yours yet, one of them about to be. At that moment there is no wear count to log, only an estimate, and the estimate has to sit next to a price, a fabric and a photograph of a thing in a shop.
So the honest split is: log wears in a closet app, and estimate cost per wear on the shortlist before anything is bought.
The fields that make it real
The inputs live in four places, which is most of why the calculation gets skipped. Put them on the item.
| Field | What goes in it |
|---|---|
| Fabric | The single best predictor of whether a piece survives a season. |
| Wears a year | Your honest estimate. Not aspiration. |
| Years | How long the fabric and the fit will both last. |
| Cost per wear | Price divided by the product of the two above. |
Doing this for six pieces takes about ten minutes and changes at least one decision, in my experience usually toward the more expensive option in outerwear and toward the cheaper one in anything trend-adjacent.
Why it belongs on a board rather than in a spreadsheet
The calculation is trivial arithmetic. What is not trivial is that a coat is a visual object and a spreadsheet row is not. You are making two judgements at once: is this worth the money, and does it go with the other things I own. The second question needs a picture and the other pieces beside it.
A board holds both. The cost per wear sits on the item as a field, and the item sits next to the five things you would wear it over.