Shoe Size Calculator
Convert shoe sizes between US, UK, EU, and CM systems instantly. Supports men's, women's, and children's sizes. Perfect for international shopping and finding the right fit.
What Is a Shoe Size Calculator?
A shoe size calculator (or shoe size converter) is a tool that converts shoe sizes between different international sizing systems. The major systems are US, UK, EU, and CM (foot length in centimeters). Since sizing standards vary by country and by gender, this calculator helps you find the right size when shopping internationally or across different brands.
Shoe sizes are typically based on the length of the foot, measured in centimeters or inches, with different formulas used to convert foot length into a size number for each system.
How Does the Shoe Size Calculator Work?
The calculator uses standard conversion formulas based on foot length in centimeters:
Foot Length (CM) → Size Conversion:
US Men's: Size = (Foot Length × 3) − 22
US Women's: Size = (Foot Length × 3) − 21
UK: Size = (Foot Length × 3) − 23
EU: Size = (Foot Length × 1.5) + 2
Children's: Size = (Foot Length × 3) − 11.5
Note: These are standard formulas; actual sizes may vary by brand.
You can enter a size in any supported system, and the calculator will instantly convert it to all other systems, showing you the equivalent sizes and the approximate foot length in centimeters.
Why Use This Shoe Size Calculator?
- International Shopping: Buy shoes from US, UK, or European brands with confidence.
- Multiple Systems: Supports US Men's, US Women's, UK, EU, and CM systems.
- All Categories: Works for men's, women's, and children's sizes.
- Instant Results: See all converted sizes at a glance.
- Free & Private: No registration, no data storage.
❓ Shoe Size FAQ
How do I measure my foot length for shoe sizing?
Place a piece of paper on the floor against a wall. Stand on it with your heel against the wall. Mark the longest toe on the paper. Measure the distance from the wall to the mark in centimeters. Repeat for both feet and use the longer measurement.
What is the difference between US men's and women's shoe sizes?
US women's sizes are typically 1.5 to 2 sizes larger than men's. For example, a women's size 8 is approximately a men's size 6.5. This calculator automatically applies the correct conversion based on the category you select.
How do I convert US shoe size to UK?
For men's sizes: UK size = US size − 0.5. For women's sizes: UK size = US size − 2. For example, US Men's 10 = UK 9.5, and US Women's 8 = UK 6.
How do I convert US shoe size to EU?
For men's: EU size = US size + 33. For women's: EU size = US size + 31. For example, US Men's 10 = EU 43, and US Women's 8 = EU 39.
What is the difference between EU and UK shoe sizes?
EU sizes are based on the Paris point (2/3 cm per size). UK sizes use a different scale. Generally, EU size 39 is approximately UK 6, EU 40 is UK 6.5, and so on.
How do I convert foot length in centimeters to shoe size?
Use these formulas: US Men's = (CM × 3) − 22, US Women's = (CM × 3) − 21, UK = (CM × 3) − 23, EU = (CM × 1.5) + 2. This calculator does this conversion automatically for you.
What is a Mondopoint shoe size?
Mondopoint is an international standard that measures foot length in millimeters. It's often used in ski boots and some athletic shoes. For example, a Mondopoint of 260 means the foot is 260 mm (26 cm) long.
Do shoe sizes vary by brand?
Yes. Different brands use different lasts (foot molds) and have different sizing conventions. Always check the brand's size guide and read reviews about fit. This calculator provides a standard reference, but actual fit may vary.
What is the difference between children's and adult shoe sizes?
Children's sizes typically run from about US 1 to 7 (approx. EU 32 to 40). Adult sizes start around US 7.5 (women's) or US 8 (men's). This calculator supports both categories.
How do I convert children's shoe sizes?
Children's sizes use the same US, UK, EU systems but with different scales. For children's sizes, US size roughly equals UK size (unlike adult sizes where they differ). This calculator handles children's conversions separately.
What is the average shoe size for men and women?
The average US shoe size for men is about 10.5, and for women about 8.5. However, averages vary by region and population.
How do I choose the right shoe width?
Shoe width is typically indicated by letters: B (narrow), D (medium/standard), E (wide), EE (extra wide) for men, and AA (narrow), B (medium), D (wide) for women. Width varies by brand, so always check the brand's specific width guide.
What is the difference between US and UK shoe sizing for women?
US women's sizes are typically 2 sizes larger than UK. For example, US Women's 8 = UK 6. This calculator automatically applies this conversion.
How do I convert EU shoe size to US?
For men's: US size = EU size − 33. For women's: US size = EU size − 31. For example, EU 43 = US Men's 10, and EU 39 = US Women's 8.
What is the Japanese shoe size system?
Japanese shoe sizes (JP) are based on foot length in centimeters, but typically use a different scale. JP 25 = 25 cm foot length, which is approximately US Men's 7.5 or US Women's 9.
How do I measure my foot width?
Measure the widest part of your foot (the ball) with a tape measure. Compare your measurement to the brand's width chart. Standard widths are B (narrow), D (medium), and E (wide) for men, and AA (narrow), B (medium), D (wide) for women.
Why do my feet measure different sizes?
It's common for one foot to be slightly larger than the other. Always use the larger foot measurement when selecting shoe sizes. You can also choose shoes that fit the larger foot and use insoles for the smaller one.
How do I convert shoe sizes for different genders?
This calculator handles gender differences automatically. Simply select "Men's" or "Women's" and enter your size. The calculator will show the equivalent sizes for the selected category.