Clothing Size Calculator – Guide & Formulas
Determine and convert clothing sizes (shirts, dresses, pants, jackets) across US, UK, Europe, and international sizes based on body measurements.
Try the free calculator
Put these formulas into practice with our instant, step-by-step Clothing Size Calculator.
Clothing size tags can be highly misleading due to variation between brands, fits, and countries. This Clothing Size Calculator estimates your standard retail apparel size (XS, S, M, L, XL, XXL) and converts it to corresponding US, UK, and European numeric sizes based on your actual chest, waist, and hip circumference measurements.
Key Takeaway
Use the free Clothing Size Calculator to determine and convert clothing sizes (shirts, dresses, pants, jackets) across us, uk, europe, and international sizes based on body measurements. Get instant results with step-by-step explanations.
How to Use the Clothing Size Calculator
- Select your gender and choose the apparel category (Tops/Shirts, Pants/Bottoms, or Dresses).
- Input your body measurements: Chest, Waist, and Hip circumference.
- Check your estimated standard letter size (e.g., Medium) and local numeric size conversions.
- Review key guidelines for choosing slim, regular, or relaxed apparel cuts.
The Formula
Variable Definitions
- Chest: Circumference around the fullest part of the chest / bust
- Waist: Circumference around the narrowest part of the natural waist
- Hips: Circumference around the fullest part of the glutes
Determining Shirt and Top Sizing
A male customer has a measured chest circumference of 40 inches and a waist of 33 inches.
- Step 1: Reference male sizing charts for 40-inch chest.
- Step 2: 40-inch chest falls squarely in the "Medium" (M) category, which spans 38 to 41 inches.
- Step 3: Map to international size systems: US Size 40, EU Size 50, UK Size 40.