How to Calculate BMI

Learn how to calculate your Body Mass Index (BMI), understand BMI charts, limitations of BMI, and what your score really means for your health.

CL
CalcLeap Editorial Team
Reviewed by certified professionals ยท Last updated April 1, 2026
๐Ÿ“… Updated March 2026 โฑ 7 min read ๐Ÿฅ Health
18.5-24.9
Normal BMI Range
703
Imperial Multiplier
kg/mยฒ
BMI Units

Key Takeaway: This comprehensive guide covers everything you need to know to make informed decisions.

๐Ÿ“ How We Calculate This

Our calculations follow clinical guidelines from the CDC, WHO, and NIH. BMI uses the standard formula: weight (kg) / height (mยฒ). Caloric estimates use the Mifflin-St Jeor equation, validated as the most accurate resting metabolic rate formula.

These tools are for informational purposes and do not replace medical advice. Consult a healthcare provider for personalized health recommendations.

๐Ÿ“š Sources & References

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Frequently Asked Questions

Is this calculator free?

Yes, completely free with no signup required. All calculations run in your browser for privacy.

How accurate are the results?

Our calculators use industry-standard formulas. Results are estimates for educational purposes โ€” always verify important decisions with a qualified professional.

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