What is OmniConverter?

OmniConverter is a free online converter suite with professional-grade tools for unit conversion across 20+ categories, color design tools (palette generator, gradient maker, color picker), 200+ Google Fonts browser, image compression and conversion (17 tools), PDF tools, text utilities (case converter, word counter, diff checker), technology history timelines, and news coverage across 7 sections.

Is OmniConverter free to use?

Yes, all OmniConverter tools are completely free. No sign-up, no account, no subscription required. Just open and convert.

Does OmniConverter support multiple languages?

Yes, OmniConverter is available in 8 languages: English, Spanish, French, German, Chinese, Japanese, Hindi, and Arabic. Blog posts are in English only.

What unit conversions does OmniConverter support?

OmniConverter supports 20+ unit categories including length, weight, temperature, area, volume, speed, time, currency, digital storage, pressure, energy, power, force, frequency, angle, fuel consumption, shoe size, clothing size, ring size, and more. All conversions use exact factors with live currency rates.

Shoe Size Printable Chart: US/EU/UK/CM for Men, Women, Kids + How to Measure - Exact Formula & Chart

Shoe Size Printable Chart: US/EU/UK/CM for Men, Women, Kids + How to Measure - exact formula, chart and live converter. Type once, see every unit. Try our Shoe Size Converter free - private, in your browser.

Quick Answer

US = UK+0.5, EU = US+33 (men).

Example: US Men 9 = UK 8.5 = EU 42 = 27 cm.

Women: US 8 = EU 39 = 24.5 cm. Measure heel to toe in cm
add 0.5 cm
then chart below for men/women/kids.

Formula & 1-10 Table

Men: US 7=UK 6.5=EU 40=25.5cm, US 9=UK 8.5=EU 42=27cm, US 11=UK 10.5=EU 44=28.5cm
Women: US 6=UK 4=EU 36=22.5cm, US 8=UK 6=EU 39=24.5cm, US 10=UK 8=EU 41=26.5cm
Kids: US 1=EU 32=16cm, US 3=EU 35=18cm, US 5=EU 37=19.5cm - measure heel to toe +0.5cm

Where You'll Use This

Daily life - shopping, travel, recipes, or work specs need exact conversion.
Avoid 20 percent errors - check US vs UK and metric vs imperial.
Try our live converter - type once, see every unit, copy instantly.

How to use the converter in 3 steps

Step 1: Select your From and To units (e.g., cm to inches).
Step 2: Type the amount - every unit updates as you type.
Step 3: Copy with the copy icon.

Common mistakes to avoid

Mixing US vs UK systems - gallon, pint, and stone differ. Always check source.
Rounding too early - keep full factor until final display, then round to 2 decimals.
Using 1000 instead of 1024 for digital storage - RAM uses 1024, drive makers use 1000.

Always double-check your source system and use exact factor from BIPM or NIST.

Internal guides & tools

Explore more: Length Converter, Weight Converter, Volume Converter, Temperature Converter and OmniCalculator

Sources & standards

BIPM - SI Brochure 9th ed. - bipm.org

NIST SP 811 - Guide for SI - nist.gov

FAQ - People also ask

What is the exact formula?

See Quick Answer above - exact factor from BIPM/NIST. Keep full precision until final.

How do I convert without calculator?

Use our free converter - type value, get instant answer. Works offline after load.

Why does this matter?

Wrong conversion = wrong dose, size, or pay. Use exact factors.