Fitness calculators
BMI Calculator
Compute body mass index from height and weight, then see the WHO screening category. Runs locally — not a clinical assessment.
This BMI result is an educational screening estimate only — not a medical diagnosis, health assessment, or substitute for advice from a qualified healthcare professional. BMI does not account for muscle mass, bone density, age, sex, ethnicity, pregnancy, or overall body composition. WHO categories are population-level guidance, not personal health targets. Consult a clinician for individualized guidance.
BMI
22.9
WHO category
Normal weight
Reference range: 18.5 – 24.9
How to use
- Choose metric (kg, cm) or imperial (lb, ft/in).
- Enter your weight and height.
- Read your BMI value and WHO category.
Features
- Metric and imperial unit support
- WHO adult BMI categories
- Instant browser-local calculation
Privacy & how it works
This calculator runs entirely in your browser with JavaScript. Your inputs are not uploaded to ToolsWeb servers for this tool. Privacy Policy · Disclaimer.
FAQ
What BMI categories does WHO use?expand_more
Underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obesity classes I–III (30+). These are screening ranges, not diagnoses.
Is BMI accurate for athletes?expand_more
BMI can overestimate body fat in muscular people and underestimate it in others. It is a population screening tool, not a body-composition measure.
Does this store my measurements?expand_more
No. All math runs in your browser.
Is this calculator free?expand_more
Yes. No signup required.
Are my numbers uploaded?expand_more
No. Calculations run in your browser. Inputs are not sent to ToolsWeb servers for this tool.
Is this professional advice?expand_more
No. Results are estimates for general information. See our Disclaimer for health, finance, and related tools.