Cost Per Wear, Done Properly
Cost per wear has a reputation as a shopping license — the number that justifies whatever the heart already bought. Run with honest inputs, it does the opposite: it quietly re-ranks a closet and kills bad purchases before they happen. The difference is entirely in what you feed it.
The formula, with honest inputs
Divide everything the piece costs by the times you will actually wear it:
CPW = (purchase price + alterations + repairs + required care) ÷ wears
The denominator is where self-deception lives. Project wears from evidence, not aspiration: the count from last season’s log, or a truthful recall of how often the predecessor was worn. If you wore your last wool coat sixty times a winter, the new one gets sixty — not the hundred and twenty that would make the price comfortable. Counting a wear only when the piece leaves the house keeps the number conservative; a garment “worn” for three hours at a desk is still a wear, but only if you actually reached for it.
A worked comparison
Three purchases, one formula:
| Purchase | All-in cost | Wears (defensible) | CPW |
|---|---|---|---|
| Wool overcoat, worn 90 times a year for 5 years | $340 | 450 | $0.76 |
| Trend jacket, one season | $95 | 12 | $7.92 |
| Occasion bag, 4 wears a year for 5 years | $1,200 | 20 | $60.00 |
The cheap jacket loses to the expensive coat by a factor of ten. The occasion bag — the purchase that feels most “worth it” in the store — is the most expensive thing in the table per use. None of this requires the coat to be a better object; the math is only reporting wear frequency, which is the input that dominates the result.
Where the number breaks
Cost per wear fails in four identifiable cases, and each failure has a tell:
- Trend decay. The projection assumes a flat wear rate, but fashion-cycle pieces stop being reached for long before they stop being wearable. If the piece’s appeal is its novelty, halve the projection at minimum.
- Fit friction. A piece that is slightly wrong in size gets worn a fraction of its projected count — then the number is fiction. Convert the fit before the price; measuring across size charts decides whether the wear count is real.
- The wear-out ceiling. CPW keeps falling on paper as years pass, but delicate fabrics and fragile constructions stop at a finite wear count. A coat in fabric that can’t take daily cycling never reaches year five, which is why fabric selection in coat materials is the input under the input.
- One-function pieces. Wedding-guest dresses and formal bags carry low wear counts by design. CPW is honest about this; the shopper is the one who isn’t.
What the number is actually for
Used properly, CPW is a screen between two candidates for one slot — the comparison that a twelve-piece wardrobe audit turns into policy: a piece must earn combinations and a defensible wear count or it does not enter. It is not a verdict on any single purchase, and it cannot rescue a piece you won’t reach for. When the inputs are honest, the conclusion is usually boring: the versatile, well-made, slightly dull option wins. That is what the tool is for.
FAQ
- Should care and repair costs go into the calculation?
- Yes. Resoling, alterations and professional cleaning are part of the purchase price; a shoe that costs $80 plus $40 of resoling over its life is a $120 shoe.
- What counts as a good cost per wear?
- There is no universal number. Anything under a few dollars per wear beats most impulse buys, but the useful comparison is always between two real candidates for the same slot, not against an abstract target.
- Does cost per wear work for occasion pieces?
- It works, and it usually indicts them. A formal piece worn four times a year needs a very low price to compete — the math is doing its job by saying so.
