BMI Calculator
Calculate your Body Mass Index (BMI) from height and weight.
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BMI is a screening measure, not a diagnostic tool. Consult a healthcare professional for health advice.
BMI Calculator
Body Mass Index (BMI) estimates body fat based on height and weight. Enter your measurements to see which category you fall into — underweight, healthy, overweight, or obese.
Related: Age Calculator, Percentage Calculator.
FAQ
Is this calculator free to use?
Yes. The calculator is free to use in your browser and does not require an account.
Do I need to install anything?
No. The calculator runs in a normal modern browser, so you can use it on desktop or mobile without installing extra software.
Is my data uploaded to a server?
No. All calculations happen locally in your browser. Your data never leaves your device.
Are the results accurate?
Yes. The calculator uses standard mathematical formulas. For critical decisions, verify with a second source.
Can I use this for professional work?
Yes, but verify important results. Keep records when the work affects billing, legal, or operational decisions.
Why does my result differ from another tool?
Different tools may use different rounding, input formats, or calculation methods. Check your inputs and compare with the expected output.