Shirt Size Calculator
Estimates men's and women's shirt size from chest or bust measurements across regional systems.
Your measurements
Around the fullest part, tape level and not tight.
Around your natural waistline.
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 chest (men) or bust (women); waist and height are optional.
- Pick the size system to show and press Estimate size.
How it works
The Shirt Size Calculator estimates a shirt, top or hoodie size from your chest or bust measurement and shows alpha (XS–XXL) and AU/UK/US/EU equivalents.
Chest or bust is the primary measurement for tops; the tool scores it against each size's range and returns the best fit plus adjacent sizes. Fit preference (slim vs relaxed) and fabric change the feel, so a range is shown.
Worked example
Men's 100 cm chest. A 100 cm chest is about a size L (UK/US 40, EU 50), with M or XL worth trying for a slimmer or roomier fit.
Frequently asked questions
Where do I measure chest or bust?
Around the fullest part of the chest or bust, keeping the tape level under the arms and not pulled tight.
Should I size up for a hoodie?
Hoodies and relaxed tops often fit larger; if you like a roomy fit or layering, consider the adjacent larger size shown.
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
- Jeans Size Calculator
- Shoe Size Calculator
- Bra Size Calculator
- Kids Clothing Size Calculator
Explore more in Health, Fitness, Nutrition & Body.
Cite this tool
Zerdly. (2026). Shirt Size Calculator. Retrieved from https://www.zerdly.com/tools/shirt-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.