To calculate your US shoe size, use the formula corresponding to your gender:
- US Men’s Size = (3 × Foot Length in inches) − 22
- US Women’s Size = (3 × Foot Length in inches) − 21
- US Children’s Size = (3 × Foot Length in inches) − 9.67
The Shoe Size Calculator converts foot length in inches into standard US shoe sizes for men, women, and children. Measuring your foot accurately ensures a proper fit, which is crucial for comfort and support.
Formula
- US Men’s Size = (3 × L) − 22
- US Women’s Size = (3 × L) − 21
- US Children’s Size = (3 × L) − 9.67
Variable | Description |
---|---|
L | Foot length in inches |
USM | US Men’s shoe size |
USF | US Women’s shoe size |
USC | US Children’s shoe size |
Solved Calculations
Example 1: Men’s Shoe Size for a 10.5-inch Foot
Step | Value |
---|---|
Foot Length (L) | 10.5 inches |
US Men’s Size ((3 × 10.5) − 22) | 9.5 |
Example 2: Women’s Shoe Size for a 9-inch Foot
Step | Value |
---|---|
Foot Length (L) | 9 inches |
US Women’s Size ((3 × 9) − 21) | 6 |
Example 3: Children’s Shoe Size for a 6-inch Foot
Step | Value |
---|---|
Foot Length (L) | 6 inches |
US Children’s Size ((3 × 6) − 9.67) | 8.33 |