Cost Per Use (Cost Per Wear) Calculator
Wondering if a purchase is actually worth it? This calculator spreads the price, total upkeep and expected resale value across the number of uses to give the bottom-line cost per use (a.k.a. cost per wear). Add a weekly usage rate and you also get weekly / monthly / yearly spend plus an estimated useful life, turning "did I just save money?" into "what will this really cost me long-term?".
Net cost = purchase price + upkeep − resale value, divided by expected uses.
Please enter valid numbers (uses must be greater than 0).
Cost per use
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Value verdict
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Expected useful life
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Per week
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Per month
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Per year
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Formula
cost per use = (price + upkeep − resale) ÷ uses; cost per week = cost per use × uses per week; cost per year = cost per week × 52.18 (365.25/7); useful life (weeks) = uses ÷ uses per week
- · "Net cost" is the purchase price plus the upkeep, accessories, electricity or repairs you realistically expect to pay, minus any resale or salvage value at the end. Inflation and time value of money are ignored, so this is a nominal-dollar comparison, not a discounted one.
- · Cost per use hinges on expected uses, not price. A $2 000 jacket worn 200 times costs the same per wear as a $50 jacket worn 5 times — be honest about how often you will actually use it before buying.
- · The "value verdict" is keyed purely off expected uses: ≥ 200 is excellent, 50–199 is good, 10–49 is fair, < 10 is expensive. It is a usage-leverage rating, not advice on whether you need the item.
- · Add a "uses per week" rate to convert cost per use back into weekly / monthly / yearly spend — handy for comparing against subscriptions, rentals or membership fees. We annualise with 365.25 ÷ 7 ≈ 52.18 weeks per year.
- · For shared items (household goods, family equipment), set "uses per week" to the combined household usage rather than just yours.
- · Conceptual sources: Vicki Robin & Joe Dominguez, Your Money or Your Life; the long-standing "cost-per-wear" rule of thumb in fashion magazines; standard staple of minimalism / buy-it-for-life communities.
Frequently asked
What counts as a "good" cost per use?
There is no universal threshold — it depends on your income, the category and the alternatives. Rough rules of thumb: everyday clothing below a cup-of-coffee per wear is great; outerwear / shoes under ~US$2 per wear is fine; electronics that you use daily are excellent value once they drop under ~US$0.50 per use over their lifetime; occasion-specific items (wedding dress, ski gear) can sit much higher per use without being unreasonable. The more uses you log, the more headroom you have to pay for quality.
Should I factor in inflation and the time value of money?
For everyday purchases (clothing, kitchenware, gadgets) — usually no. Useful lives are short enough that nominal figures stay close to the present-value answer, and consistency across comparisons matters more than absolute precision. For big-ticket, long-lived purchases (sofas, cars, instruments) it is worth discounting future upkeep and resale to present value at, say, 5% before plugging the numbers in. This calculator stays nominal on purpose; pre-discount the inputs if you need rigour.
My cost per use came out negative — what does that mean?
It means your expected resale value is higher than purchase price plus upkeep — so each use technically pays you. This shows up most often with collectibles (limited-edition sneakers, designer bags, vinyl) or short ownership before flipping. The figure is only as good as the resale price you can actually realise; secondary markets fluctuate a lot.
What kinds of purchases is this best for?
The biggest wins are: (1) mid- to high-priced durables — coats, shoes, cookware, appliances, instruments, bikes, furniture; (2) buy-versus-rent or buy-versus-subscribe comparisons (espresso machine vs daily café coffee); (3) repeat-purchase consumables where you want a per-use / per-cup / per-meal figure. For cheap, disposable items the math is less useful — the experience itself usually dwarfs the per-unit cost.
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