| name | calculate-cost-per-wear |
| description | Use when evaluating the true value of a clothing purchase or comparing two items to make a cost-effective buying decision |
| source | Fashion Revolution "True Cost" analysis; Project 333 (Courtney Carver); Wrap UK "Valuing Our Clothes" report (2012) |
| tags | ["fashion","finance","wardrobe","cost-analysis","sustainability"] |
| verified | true |
Calculate Cost Per Wear
Determine the real economic value of a garment by dividing total ownership cost by projected wear count, enabling rational comparison between cheap-but-disposable and expensive-but-durable options.
Why This Is Best Practice
Adopted by: Personal finance advisors; sustainable fashion educators; Project 333 participants; Fashion Revolution transparency advocates
Impact: Wrap UK (2012) found extending garment life by 9 months reduces carbon, water, and waste footprints by 20–30%; CPW analysis shifts consumer preference from fast fashion (avg CPW $3–8) to quality investment pieces (CPW $0.50–1.50); Fashion Revolution data shows price does not correlate with quality above a certain threshold
Why best: CPW converts emotional purchase impulses into comparable financial units — the same mental framework used for any capital expenditure
Sources: Fashion Revolution "True Cost" analysis; Courtney Carver Project 333; Wrap UK "Valuing Our Clothes" (2012)
Steps
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Define the formula — Cost Per Wear (CPW) = Total Ownership Cost ÷ Projected Wear Count. Target CPW: ≤$1.00 for everyday items, ≤$2.00 for occasion wear, ≤$5.00 for once-per-year formal items.
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Calculate total ownership cost — include: purchase price + alterations/tailoring + dry cleaning (annual cost × expected years owned) + repairs. Exclude sunk costs on items already owned.
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Estimate projected wear count — multiply: expected wears per week × 52 × years you'll own it. Use conservative estimates: fast fashion lifespan 1–2 years, quality basics 5–10 years, investment pieces 10–20 years.
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Apply lifestyle reality check — before projecting wear count, verify: Does this fit your actual lifestyle? Does it fit your current body now (not aspirational)? Does it pair with 3+ pieces you already own?
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Compute CPW and benchmark — divide total cost by projected wears. Compare against your CPW ceiling. Example: $200 coat, worn 3×/week for 8 months/year for 10 years = 240 wears/year × 10 = 2,400 wears; CPW = $0.08 — excellent.
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Compare alternatives — run CPW on each option being considered. A $30 fast-fashion equivalent lasting 1 year at 1×/week = 52 wears; CPW = $0.58 — still acceptable, but factor in quality degradation after wash cycle 20.
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Factor in resale value — for quality items, subtract estimated resale value from total ownership cost. Designer and quality basics retain 30–60% resale value on platforms like ThredUp, Poshmark, or Vestiaire.
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Apply the regret test — if CPW is borderline acceptable, ask: "Will I regret not buying this in 30 days?" If uncertain, wait 48 hours; impulse passes, genuine need remains.
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Document the decision — log purchase decisions (buy/pass) with CPW rationale. Review quarterly to calibrate projection accuracy — did you actually wear it as often as projected?
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Recalculate on audit — at each wardrobe audit, retrospectively calculate actual CPW for items being retired. Compare projected vs. actual to improve future estimates.
Rules
- Never calculate CPW on an item that fails the 3-outfit combination test — no wear count projection is credible if the item has no outfit partners
- Resale value may only be subtracted if you have a concrete plan to sell (not "someday I'll sell it")
- CPW ≤$1.00 is the threshold for everyday items; above this, the item needs strong justification
- Dry cleaning costs must be included — ignoring maintenance costs understates true CPW by 15–40% for delicate fabrics
Common Mistakes
- Overestimating wear frequency — projecting 5×/week for an item you'll realistically wear 1×/week inflates the wear count and falsely validates the purchase; use current actual behavior, not aspirational.
- Ignoring maintenance costs — a $150 silk blouse requiring $8/cleaning, cleaned 12×/year for 5 years, adds $480 in maintenance — nearly tripling the effective cost.
- Applying CPW to justify emotional purchases — CPW is a filter, not a rationalization tool; if you're running CPW numbers after deciding to buy, you're using it backwards.
- Forgetting opportunity cost — the $200 spent on a low-CPW item is $200 not available for a higher-CPW alternative; always compare the best alternative, not an abstract ceiling.
When NOT to Use
- Safety or professional compliance items (PPE, required uniforms) — CPW is irrelevant when purchase is mandatory
- Rental or borrowing scenarios — CPW applies to ownership decisions only
- Gifts — the recipient's lifestyle and preferences, not CPW, should drive gift selection
