Cost Per Use Calculator

The expensive thing is often the cheap one, and the cheap one is often the expensive one.

In short

Cost per use is the purchase price divided by the number of times you will use it, plus any running costs. A two hundred pound coat worn three hundred times costs sixty seven pence a wear, while a forty pound coat worn ten times costs four pounds. Price and cost are not the same thing.

Last reviewed 1 September 2026

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The arithmetic

cost per use = (price + running costs - resale) / total uses

A 200 coat worn 60 times a year for 5 years is 300 wears, so 67p a wear. A 40 coat worn the same amount but lasting one year is 60 wears, so 67p a wear as well, and you buy five of them. The expensive coat was not more expensive.

Change the numbers slightly and the conclusion flips. That is the point: the price tag alone does not tell you which is cheaper, and it is the number most people decide on.

The honest-use problem

This calculation is easy to abuse, and almost everyone abuses it the same way: by estimating uses from intention rather than history.

The 800 bike bought to cycle to work every day. The bread maker. The gym membership. The camera for the trip. All of them look excellent at the imagined use count and absurd at the real one.

Use what you have actually done. If you cycled eleven times last year, put in eleven. The number will be uncomfortable and it will be correct, and it is a far better guide to the next purchase than optimism is.

Where it genuinely changes decisions

Things you use constantly. A mattress used 2,500 times over seven years, a desk chair used daily, shoes you wear to work. Paying more is usually the cheaper choice and almost always the more comfortable one.
Things you use rarely. A carpet cleaner used twice a year, a tile saw, a roof box. Renting or borrowing is often dramatically cheaper, and storage is a cost too.
Tools. The old advice to buy cheap, and buy the good one when the cheap one breaks, is really a cost-per-use argument in disguise.
Subscriptions. Divide the annual cost by the number of times you actually opened it. This is frequently the most sobering calculation on the list.

What it does not capture

Whether you needed it. A very low cost per use on something you did not need is not a saving. This compares options after the decision to buy, not the decision itself.

Quality of experience. Two chairs at the same cost per use are not equivalent if one gives you back pain. Some of what you pay for is not durability.

Cash flow. The cheaper-per-use option often costs more today. If paying 200 now means borrowing at 22%, the arithmetic changes entirely.

Uncertainty. A five year lifespan is an estimate. Things get lost, broken, outgrown and superseded, and tastes change.

A useful habit

Before a significant purchase, write down the number of uses you expect. Then look at it again a year later.

Most people find their estimates are consistently optimistic by a factor of two or three, and that pattern is far more useful than any single calculation. Once you know your own bias you can correct for it, which is more than most spending advice achieves.

Frequently asked questions

What is cost per use?

The purchase price plus running costs, divided by the number of times you actually use something. It reframes "expensive" from what you pay once to what it costs you each time, which is usually the more useful question.

How do I estimate uses honestly?

Base it on what you have actually done, not what you intend to do. If you have been to the gym eleven times this year, the honest figure for a new pair of trainers is not three hundred. Aspirational use counts are the main reason this calculation flatters bad purchases.

Does resale value count?

Yes, and it changes the answer considerably for cars, tools, cameras and bikes. Enter what you expect to recover and it is deducted from the total cost, since money you get back was never really spent.

Is a lower cost per use always better?

No. Buying something you will use a thousand times is only sensible if you needed it at all. Cost per use compares options once you have decided to buy; it does not answer whether you should.

Does this account for the money being tied up?

Not directly. Spending 800 now rather than 200 means 600 is unavailable for anything else, which has a real cost. For large purchases, consider what that difference would have earned or which debt it would have cleared.