Jeans Size Calculator
Estimates jeans size across AU, UK, US and EU from waist, hip and inseam measurements.
Your measurements
Around your natural waistline.
Around the fullest part of your hips/seat.
Stand straight without shoes.
Your estimated size
Enter your measurements and press Estimate size to see a recommended size range. Sizing varies by brand.
Before you rely on this: Use this as a quick guide and check the result against your own working before you rely on it.
How to use this calculator
- Choose women's or men's, then cm or inches.
- Enter your waist and hip/seat (height is optional).
- Pick the size system to show and press Estimate size.
How it works
The Jeans Size Calculator estimates your pants or jeans size from waist and hip measurements, showing waist sizing and AU/UK/US/EU or alpha equivalents.
It scores your waist and hip against each size's measurement range and returns the best fit plus adjacent sizes. Because jeans cut and stretch vary widely, it shows a range and a confidence level rather than one exact size.
Worked example
Men's 90 cm waist. A ~90 cm waist maps to about a 34–36 inch jeans waist depending on rise and cut, with EU 50–52 equivalents.
Frequently asked questions
Should I measure my body or my jeans?
Measure your natural waist and fullest hip for a body-based estimate. If you prefer a known-good pair of jeans, measure them flat and double the waist — but body measurements are more consistent here.
Why don't my jeans match the calculated size?
Denim stretch, rise (low/mid/high) and cut (skinny/straight/relaxed) all shift fit. Use the result as a starting point and check the adjacent size.
How accurate are these size results?
They are a helpful starting point, not a guarantee. Brand sizing, garment cut, fabric stretch, body shape and measurement technique all change the best fit, so we show a recommended size plus adjacent sizes rather than one exact answer.
Related tools
- Clothing Size Finder
- Dress Size Calculator
- Shirt Size Calculator
- Shoe Size Calculator
- Kids Clothing Size Calculator
- Bra Size Calculator
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Cite this tool
Zerdly. (2026). Jeans Size Calculator. Retrieved from https://www.zerdly.com/tools/jeans-size-calculator/
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.