How To · Fashion · Shopping
Calculate the true cost of every piece you buy
A $40 shirt worn twice costs $20 per wear. A $200 coat worn 100 times costs $2 per wear. Learn the math that changes how you shop.
5 min read · IrisFast fashion thrives on a lie: that cheap means affordable. But a $25 trend piece you wear three times before it falls apart costs more per wear than a $150 sweater you'll reach for 200 times. The math is brutal, and it's the only number that matters.
This calculator strips away marketing and impulse. It forces you to answer one honest question before you buy: *Will I actually wear this enough to justify the price?* Once you start thinking in cost-per-wear, your closet—and your bank account—transforms.
A $40 shirt worn twice is a $20 purchase. A $200 coat worn 100 times is a $2 purchase.
What you'll need.
- 01Calculator or spreadsheet app
- 02Pen and paper or notes app
- 03Phone reminder or closet tracking app
- 04Your existing closet inventory
Step one · 1 minute
Write down the full price
Include everything: the sticker price, tax, shipping, and any alterations you'll need. Don't round down or pretend the discount code made it cheaper than it actually was. Be honest about what you're really spending. This number is the foundation of everything that follows.
If you're buying secondhand, use the actual price you paid, not the original retail.
Step two · 2 minutes
Estimate realistic annual wears
Not the fantasy version where you wear it constantly. The real version. A white button-down you'll throw on twice a week is 100+ wears per year. A sequin top for special occasions? Maybe 4. A winter coat? 60–80 if you live somewhere cold. Think seasonally and honestly about your actual lifestyle and closet habits.
Multiply your estimate by how many years you'll realistically keep the piece. A quality blazer might last 5 years; a trendy crop top might last 1.
Step three · 2 minutes
Divide price by total wears
This is the formula: Full Price ÷ Total Wears = Cost Per Wear. A $100 pair of jeans worn 200 times = $0.50 per wear. A $60 dress worn 6 times = $10 per wear. The number reveals everything. If your cost-per-wear is higher than similar basics you already own, ask yourself why this version is worth the premium.
Keep a running spreadsheet of your favorite pieces and their cost-per-wear. You'll start to see patterns in what's actually worth buying.
Step four · 2 minutes
Compare to your closet baseline
You already own pieces you love. A white t-shirt you've worn 150 times might cost $0.33 per wear. A black blazer, $0.80 per wear. These are your benchmarks. Before buying anything new, ask: Does this new item beat my baseline? If a new shirt costs $1.50 per wear and your go-to costs $0.50, the new one better do something your existing piece can't.
Your baseline changes as you invest in quality basics. That's the point—better pieces lower your cost-per-wear over time.
Step five · 2 minutes
Set your personal cost-per-wear threshold
Decide what you're willing to pay per wear for different categories. Basics might be $0.50–$1. Workhorses like jeans or blazers, $1–$3. Statement pieces or occasion wear, $5–$10. Anything above your threshold needs a compelling reason—and you need to be honest about whether that reason is real or just desire dressed up as necessity.
Your threshold will shift as your income changes. That's normal. The point is having one at all.
Step six · ongoing
Track actual wears for three months
After you buy something, actually count how many times you wear it. Set a phone reminder to check in at 30, 60, and 90 days. This teaches you where your estimates are wrong—and they will be. You'll discover you wear certain colors more than you thought, or that 'versatile' piece sits unworn. This data is gold for future purchases.
Use a simple tally mark in your phone notes or a closet app. You don't need anything fancy.
How to know it's working.
You'll stop buying things you're not sure about. Your closet will feel smaller but more useful. You'll own fewer pieces that cost less per wear. Most importantly, you'll stop feeling guilty about 'expensive' purchases that you actually wear constantly, and you'll stop justifying 'cheap' purchases that sit unworn.
Questions at the mirror.
What if I buy something and never wear it?
That's the point of the calculator—it forces you to predict whether you'll actually wear something before you spend money. If you already bought it, calculate the damage (full price ÷ 0 wears = infinite cost per wear) and learn from it. Will you wear it in the next month? If not, sell it or donate it and move on.
Does cost-per-wear mean I should only buy basics?
No. Statement pieces and occasion wear have a place. But they need a higher cost-per-wear threshold because you'll wear them less. A $200 dress worn 10 times is $20 per wear, which is reasonable for something that makes you feel incredible. A $200 dress worn twice is $100 per wear, which is not.
How do I account for pieces that go in and out of style?
Honestly. If you love a trend and know you'll wear it for one season, factor that in. A $50 piece worn 30 times in three months = $1.67 per wear. That's fine if you're intentional about it. The problem is buying trends you're not sure about and hoping they'll stick around.
What about quality and durability?
They're built into the formula. A $30 shirt that falls apart after 10 wears costs $3 per wear. A $80 shirt that lasts 200 wears costs $0.40 per wear. Quality isn't always more expensive—it's just more durable, which lowers your cost-per-wear over time.