Does the shoe size converter upload my data?

No. Every conversion runs in your browser from built-in chart data, and it works offline.

Shoe Size Converter — Free Online Shoe Size Converter

How do I convert a shoe size between US, UK, EU and other systems?

Pick your category — men, women or kids — choose the system you know your size in (US, UK, EU, CM, Japan or Australia), and type the size. AnyTool Shoe Size Converter instantly shows the matching size in every other system, anchored on foot length in centimetres. A measure-your-foot helper turns a tape-measure reading into a recommended size with honest toe-room guidance. Everything runs in your browser, so nothing is uploaded.

Convert across US, UK, EU, CM, Japan and Australia at once
Separate, real charts for men, women and kids — they genuinely differ
Foot-length (cm) anchor keeps conversions consistent across brands
Measure-your-foot helper recommends a size with +1–1.5 cm toe room
100% in your browser — no upload, no signup, works offline

What is

Shoe Size Conversion

Shoe size conversion maps a size from one regional system to another — for example US to EU. Because the US, UK and EU number lines start at different points and step by different amounts, and because the scales differ for men, women and children, conversion is done from published charts rather than a single formula. Foot length in centimetres is the most reliable anchor, since a centimetre is a fixed unit while sized numbers drift by brand.

Converters

Related terms

US to EU shoe sizeUK shoe sizefoot length cmMondopointParis point

Frequently Asked Questions

For men, a US 10 is about an EU 44 and a UK 9.5, fitting a foot around 27 cm long. The numbers are different for women: a women’s US 10 is roughly an EU 40.5 and a UK 8. That is why AnyTool asks for your category first and uses a separate chart for men, women and kids rather than one universal table.

A men’s US 10 is roughly an EU 44 and a UK 9.5, about a 27 cm foot. Women’s sizes differ.

Put a sheet of paper against a wall, stand on it with your heel touching the wall and your weight on the foot, then mark the tip of your longest toe and measure that distance in centimetres. Do both feet and use the larger one. In AnyTool, type that length into the measure-your-foot helper and it adds about 1–1.5 cm of toe room and recommends a size in every system.

Stand on paper, trace both feet, measure heel to longest toe, and use the larger foot in centimetres.

Shoe sizing is not standardised like metric units, so the same labelled size can fit differently across brands and styles. AnyTool’s conversions are built from published charts and are best-estimate guides. The surest approach is to measure your foot in centimetres, match the CM column, then confirm against the specific brand’s size guide; when between two sizes, size up.

No. They are best estimates — fit varies by brand, last and style, so check the brand’s own chart.

AnyTool Shoe Size Converter computes everything locally in JavaScript using stored conversion rows for men, women and kids. No size or measurement is sent to a server, there is no tracking, and the page keeps working offline after the first load.

Detailed Explanation

Methodology

How the Shoe Size Converter Works

AnyTool Shoe Size Converter is chart-based rather than formula-based, because the US, UK and EU number lines start at different offsets and step differently, and the scales themselves differ for men, women and children. The tool stores real conversion rows for each of three categories — men, women and kids — and uses foot length in centimetres as the anchor. When you enter a size in any system it locates the matching row, converts to a foot length, then maps that length to every other system; values between listed sizes are interpolated. Japan uses the Mondopoint centimetre scale, EU follows the Paris-point scale (about two-thirds of a centimetre per size), and Australian sizing rides on the UK scale for men and kids and the US scale for women.

Six systems: US, UK, EU, CM (foot length), Japan and Australia
Separate real charts for men, women and kids — they differ
Foot length in centimetres is the brand-independent anchor
In-between sizes are interpolated through the CM column
All conversion runs in the browser — no server round-trip

How It Works

Measure-Your-Foot Helper and Toe Room

Beyond converting a known size, the tool turns a measured foot length into a recommended size in every system. Enter the length in centimetres or inches; it adds about one centimetre of toe room (honest +1–1.5 cm guidance) and rounds up to the next listed size so the shoe is never too short. This is the most reliable path because a centimetre is a fixed unit, unlike sized numbers that drift between brands. The page also shows the full per-category reference chart with the matching row highlighted, and is explicit that conversions are best estimates.

Foot length in cm or inches → recommended size in all systems
Adds ~1 cm toe room and rounds up to the next listed size
Advises measuring both feet and using the larger one
Full per-category reference chart with the matched row highlighted
Clear honesty note: fit varies by brand, last and style

Privacy & Security

Privacy and Offline Use

Because all conversion runs in the browser from built-in chart data, no size or measurement is sent to a server, there is no account or tracking, and the page works offline after first load. The logic lives in a pure, unit-tested engine so behaviour is consistent and auditable.

Shoe size conversion: in-browser (AnyTool) vs typical online charts
Capability	AnyTool	Typical online charts
Processing	Runs in your browser	Static page or server lookup
Categories	Men, women and kids (separate charts)	Often one mixed chart
Systems	US, UK, EU, CM, Japan, Australia	Frequently US/UK/EU only
Foot-length anchor	Yes — cm anchor + interpolation	Rarely
Measure-your-foot helper	Yes, with toe-room guidance	Seldom
Honesty about fit	Explicit best-estimate notice	Often implies exactness
Works offline	Yes (PWA)	No
Cost / signup	Free, no signup	Often ad-heavy or gated

AnyTool converts every system locally through a foot-length anchor and uploads nothing.

Cite This Page

Title: Shoe Size Converter (US, UK, EU, CM, Japan, Australia for men, women and kids)
Author: AnyTool
Published: January 1, 2026
Modified: February 8, 2026
Section: Converters
URL: https://www.anytool.tech/shoe-size-converter

Formatted Citation

AnyTool. "Shoe Size Converter (US, UK, EU, CM, Japan, Australia for men, women and kids)." AnyTool, January 1, 2026. https://www.anytool.tech/shoe-size-converter

A privacy-first, 100% client-side shoe size converter that translates a size across US, UK, EU, CM (foot length), Japan and Australia using real, separate conversion charts for men, women and kids — because the regional number lines start at different points and differ by category, conversion is chart-based and anchored on foot length in centimetres, with interpolation for in-between sizes. It includes a measure-your-foot helper that turns a centimetre or inch reading into a recommended size in every system with honest +1–1.5 cm toe-room guidance, shows the full per-category reference chart with the matched row highlighted, and is explicit that results are best estimates because fit varies by brand, last and style — computing everything in the browser and uploading nothing.