About BMI Calculator
Free online bmi calculator. Calculate body mass index and healthy weight category. No signup required — runs in your browser.
Why choose Online Tool Hub?
- Free forever — supported by non-intrusive ads
- Runs in your browser — inputs are never uploaded
- Works on desktop and mobile
- Part of 24 free nutrition tools on Online Tool Hub
Frequently asked questions
- Is BMI a diagnosis?
- No. BMI is a screening metric. Athletes and older adults may need additional context from a clinician.
- Is my health data sent to a server?
- Calculators run in your browser. Food searches query USDA or Open Food Facts APIs — we do not require an account.
- Do I need an account?
- No signup is required. All nutrition tools on Online Tool Hub are free to use.