How to Calculate Cost Per Wear Before You Buy a Dress

A 30 euro polyester dress worn twice costs you 15 euro every time you put it on. A 160 euro linen dress worn 80 times costs 2 euro a wear. Cost per wear is the simplest number in slow fashion, and once you start using it, the price tag on its own stops telling you very much.

I use it every time I am tempted in a shop or a late night checkout. It does not mean always buying the expensive dress. It means being honest about how often a dress will really leave the wardrobe, and paying a price that matches.

The Cost Per Wear Formula

The basic sum is short:

Cost per wear = (price + upkeep) / number of wears

Price is what you pay, including shipping. Upkeep is what it costs to keep the dress wearable over its life: dry cleaning, a hem repair, a replacement zip. Number of wears is the realistic count over the years you will own it, not the hopeful one.

A quick worked example. A cotton shirt dress costs 95 euro. You expect to wear it once a week for five months a year, roughly 20 wears, for three summers. That is 60 wears. Upkeep is low, maybe 10 euro for a button and a hem over three years. So (95 + 10) / 60 = 1.75 euro per wear.

How to Estimate Wears Honestly

This is the part we all fudge. To get a realistic number, answer three questions before you buy:

1. Which season will you wear it in? A sleeveless linen dress might have 16 to 20 weeks of real use where you live, not 52.
2. How often, per week, in that season? Once a week is generous for most dresses. A true favourite might reach twice.
3. How many years will the fabric last? Thin viscose may look tired after a season or two. Good linen or a dense cotton can go five years or more.

Now multiply. Then knock off a fifth, because life happens: a hot week when you live in shorts, a month away, a new dress that steals the spotlight.

Check your own history

Your wardrobe already holds the evidence. Pick three dresses you bought last year and count roughly how many times you wore each. Most people find their hopeful estimates were two or three times too high. Use that ratio as a correction on new purchases.

One more adjustment helps. If a dress needs a particular slip, shoes or bra to work, and you do not already own them, add their cost or count them as a separate purchase. A 90 euro dress that also needs 60 euro of new sandals is really a 150 euro decision, and the sum should say so before your card does.

Comparing Two Dresses by Price Per Wear

Here is a real comparison I made last spring between two summer dresses I liked equally in the shop.

The linen dress was nearly five times the price, yet cheaper every time I wore it. It also kept looking better, because linen softens with washing. If you want to see why, our piece on why slow fashion pieces outlast their price tag looks at fabric and construction in more detail.

What Pushes the Number Down

A lower figure comes from more wears, not just a lower price. These are the factors I look at in the fitting room:

• Fabric: natural fibres with a tight weave, such as linen, cotton poplin and Tencel, usually outlast thin blends.
• Seams: French seams or overlocked edges, and at least 1 cm of seam allowance, so the dress can be let out or repaired.
• Versatility: a dress you can wear with sandals, trainers and a cardigan gets used in more weeks of the year.
• Easy care: anything machine washable saves money and effort over dry clean only.
• Fit: a dress that fits now, not one you plan to fit into, actually gets worn.

Where the Formula Misleads You

The formula is a tool, not a verdict. It can trip you up in a few ways.

It flatters expensive items you only imagine wearing. A 400 euro silk dress looks fine on paper at 100 wears, but if your life has three dressy occasions a year, those wears will never arrive.

It ignores your budget. A cheap price per wear means nothing if the upfront price leaves you short at the end of the month. Secondhand and rental can give you a low per-wear price without the large outlay.

It hides greenwashed quality. A high price with a sustainability label is not automatically durable. Read the composition and the care label, and see our guide on how to spot greenwashing on clothing labels before trusting the marketing.

Tracking Wears Without It Becoming a Chore

You do not need an app. Two low effort methods work well:

• The hanger flip: at the start of a season, turn all hangers backwards. After you wear a dress, hang it the normal way. In three months, the backward hangers show you what you never reach for.
• A note on your phone: one line per dress, add a tick when you wear it. It takes five seconds while you brush your teeth.

After one season you will know your real numbers, and your next estimate will be far more honest. It is also the clearest sign of which shapes, colours and fabrics truly suit your life. You can find more thinking like this in the slow fashion section.

Cost Per Wear FAQ

What is a good cost per wear for a dress?

For an everyday dress, under 2 to 3 euro per wear is a good result, and favourites often fall below 1 euro. Occasion dresses will always be higher, so compare them with renting instead.

Should washing and repairs count toward the total?

It should include anything you pay specifically to keep that dress wearable, such as dry cleaning, tailoring or a new zip. Ordinary home laundry is usually left out because it is shared across your whole wardrobe.

Is this formula just an excuse to spend more?

Not if you estimate honestly. Used properly, it often stops you buying an expensive piece you would rarely wear, as much as it justifies a well made dress you will wear every week.

The Takeaway

Before your next dress, do the sum: price plus upkeep, divided by honest wears. If the answer is low and the dress fits the life you actually live, buy it without guilt. If it only works in a life you do not have yet, leave it on the rail. The best dresses I own all passed that test in the shop, and none of them cost the least.