Shoe Size Converter

Foot length to CN/EU/US/UK/JP sizes with full chart

Quick Answer

Shoe Size Converter: Foot length to CN/EU/US/UK/JP sizes with full chart. EU ≈ 1.5 × (foot cm + 1.5); foot 25.5cm → EU 40.

Foot length (mm)

Measure in the afternoon, standing on paper

CN / EU size40.0

US (men)7.5

US (women)9.0

UK size7.0

JP (cm)25.5

Matched foot length255mm

Calculation steps

1Foot length 255 mm = 25.5 cm (Mondopoint uses millimetres directly)
2Round up to the next chart row: 255 mm (shoe should be slightly longer than the foot)
3Read across the row: EU 40 / US men 7.5 / US women 9 / UK 7 / JP 25.5 cm

Shoe size chart (by foot length)
Foot mm	EU	US men	US women	UK
220	35	3.5	5	3
225	35.5	4	5.5	3.5
230	36	4.5	6	4
235	37	5	6.5	4.5
240	38	6	7.5	5.5
245	39	6.5	8	6
250	39.5	7	8.5	6.5
255	40	7.5	9	7
260	41	8	9.5	7.5
265	41.5	8.5	10	8
270	42	9	10.5	8.5
275	43	9.5	11	9
280	43.5	10	11.5	9.5
285	44	10.5	12	10
290	45	11	12.5	10.5
295	45.5	11.5	13	11
300	46	12	13.5	11.5

Measure in the afternoon (feet swell during the day), standing on paper and tracing the outline. Athletic shoes often run half a size small. Quick estimate: EU ≈ 1.5 × (foot cm + 1.5).

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How to Use

Pick units: switch source and target units in the Shoe Size Converter.
Enter a value: results sync both ways instantly — no convert button needed.
Use the reference table: common conversions are listed for instant lookup.
Copy the result: copy the converted value with its unit.

Key Points

Shoe Size Converter is a free online unit conversion tool — open and use, no sign-up.
All calculations run locally in your browser; your data never leaves the device.
Key capability: Foot length to CN/EU/US/UK/JP sizes with full chart.
Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Shoe size conversion (Mondopoint)

EU ≈ 1.5 × (foot cm + 1.5); foot 25.5cm → EU 40

US men ≈ EU − 33; US women ≈ US men + 1.5; UK ≈ US men − 0.5

JP = foot length in cm

Measure in the afternoon, standing; athletic shoes often need half a size up

Example: 255mm foot → EU 40 / US M 7.5 / US W 9 / UK 7 / JP 25.5.

FAQ

How do I use the Shoe Size Converter?

Open the page and fill in the input fields — results update automatically. Foot length to CN/EU/US/UK/JP sizes with full chart.

Are the results accurate?

Yes. Standard formulas and conversion factors are used and verified.

Is it free? Do I need to sign up?

Completely free. No registration, login or download required.

Does it work on mobile?

Yes. The responsive design works on phones, tablets and desktops.

Is my data saved?

No. Everything runs locally in your browser.

Related Guides

Source & Updates

Based on SI conversion factors and international standards. Last updated: 2025-07

Authoritative sources:

NIST SP 811 unit conversion

Last updated: 2026-08-07

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. Shoe Size Converter[EB/OL]. https://www.yijiansuan.com/en/c/convert/shoe-size

Results provided by this tool are for reference only and do not constitute professional advice.