Trouser Size Calculator
Find your perfect pants size across US, UK, and European standards.
| International Size | – |
| US Size | – |
| UK Size | – |
| EU Size (IT/FR/DE) | – |
| Waist (Target) | – |
How to Use the Trouser Size Calculator
Finding the right fit for trousers can be frustrating because sizing standards vary significantly between countries and brands. This calculator uses standardized sizing charts for men and women to provide an accurate starting point for your next shopping trip. To get the most accurate results, you should measure your waist and hips directly against your skin.
How to Measure Yourself for Trousers
- Waist: Measure around your natural waistline, which is the narrowest part of your torso, usually located just above the belly button. Keep the tape slightly loose to allow for breathing room.
- Hips: Stand with your heels together and measure around the fullest part of your hips and rear. This is crucial for women's sizing and "slim fit" men's trousers.
- Inseam: While not required for the general size, the inseam is the distance from the uppermost inner part of your thigh to the bottom of your ankle.
Understanding Men's vs. Women's Sizing
Men's Sizing: Typically, men's trouser sizes in the US and UK are based directly on the waist measurement in inches. For example, a "34" usually fits a 34-inch waist. In Europe, the size is usually the waist measurement in centimeters divided by two, or a specific offset (US size + 16).
Women's Sizing: Women's sizing is more complex and uses "vanity sizing" or arbitrary numbers (0, 2, 4, 6, etc.). Our calculator looks at the ratio between your waist and hips to suggest the most comfortable fit. If you are between sizes, it is generally recommended to size up for a more tailored look or down for a tight, stretchy fit.
International Size Conversion Table (General Reference)
If you are buying from an international brand, keep these general rules in mind:
- US to UK: Men's sizes are identical. Women's sizes in the UK are typically one to two numbers higher than US sizes (e.g., a US 6 is a UK 10).
- US to EU: Add 16 to a US Men's waist size to find the European equivalent (A US 32 is an EU 48).
- Japan: Sizing often runs smaller and is labeled in centimeters or Letter Sizing (S, M, L).
Tips for the Best Fit
Remember that fabric composition plays a huge role. Trousers with 2% Elastane or Lycra will be more forgiving than 100% heavy cotton denim or wool suit pants. Always check if the brand lists "True to Size" or "Runs Small" on their product pages.