Free Online BMI Calculator
GoCalc
Enter your height and weight to calculate your Body Mass Index and see which category you fall into.Updated 2026-03-11
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Underweight< 18.5
Normal18.5 – 24.9
Overweight25 – 29.9
Obese≥ 30
Frequently Asked Questions
Is this tool free to use?
Yes, completely free. All processing happens in your browser — no data is sent to any server.
Do I need to create an account?
No account or signup required. Just open the tool and start using it immediately.
Is my data safe?
Yes. Everything runs locally in your browser. Your data never leaves your device.
How to Use
- Review the step-by-step explanation
- Click Calculate to see the breakdown
- Save or print the results
- Adjust optional parameters for precision
FAQ
Does it show the work?
Yes, step-by-step breakdowns are provided so you can follow the calculation logic.
Are results suitable for professional use?
Provides accurate results based on standard formulas. For critical decisions, consult a professional.
What if I get an unexpected result?
Double-check your input values and units. The tool validates inputs and shows error messages.
Can I compare different scenarios?
Adjust the inputs and recalculate to compare different scenarios side by side.
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