Sock Size Calculator

Free Sock Size Calculator — convert foot length, shoe size, and demographic into US, EU, UK sock sizes plus style and fit recommendations.

931.0K uses Updated · 2026-05-12 Runs locally · zero upload
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How to Use Sock Size Calculator

The Sock Size Calculator outputs the recommended sock size for any wearer.

  1. Pick Demographic — Men, women, or youth.
  2. Enter Foot Length — In centimeters.
  3. Pick Style and Fit — Style (no-show, ankle, crew, knee-high, over-knee) and fit (snug, regular, loose).
  4. Read the Result — The Sock Size Calculator returns US, EU, and UK sock sizes plus a style recommendation.

Formula & Theory — Sock Size Calculator

men_us    = round((foot_cm − 22.0) × 1.30 + 7.0)
women_us  = round((foot_cm − 21.0) × 1.30 + 6.0)
youth_us  = round((foot_cm − 14.0) × 1.30 + 1.0)
eu_size   = round(foot_cm × 1.5 + 1)
uk_size   = us_size − 1

Sock manufacturers usually map shoe size to two-size sock ranges (e.g. men 9–11). The Sock Size Calculator turns the recommended shoe size into the right range automatically.

SymbolMeaning
foot_cmFoot length in cm
us_sizeUS shoe size
eu_sizeEuropean shoe size
uk_sizeUK shoe size

Style Cheat Sheet

No-show      flats, loafers, slip-ons
Ankle        sneakers, casual shoes
Crew         most common, business or sport
Knee-high    boots, baseball, formal
Over-knee    fashion, compression therapy

Use Cases for Sock Size Calculator

  • Online Shopping — Convert your foot length into the size range used on retailer pages.
  • Gifting Socks — Estimate the right size without asking.
  • Kids’ Sock Sizing — Quickly select the right size as kids grow.
  • International Travel — Match US, EU, and UK sock sizes when buying abroad.
  • Compression Wear — Pick the right size and length for medical compression socks.

The Sock Size Calculator removes guesswork from sock purchases.

Frequently asked questions about Sock Size Calculator

How do I measure foot length for socks?

Stand on a piece of paper and mark the longest toe and the back of the heel. Measure the distance in centimeters. The Sock Size Calculator turns this into a sock size.

Are sock sizes different from shoe sizes?

Yes. Sock sizes are usually quoted as a range (e.g. 9–11) and depend on demographic — men, women, or youth. The Sock Size Calculator maps foot length to the correct range.

Which sock style should I pick?

Crew is most common; no-show fits low-cut shoes; ankle for sneakers; knee-high for boots; over-the-knee for fashion or compression. The calculator suggests common pairings.

Is my data stored?

No. All calculations happen in your browser; nothing is sent to a server.