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Health Calculators

Free health calculators verified against WHO, NIH and other authoritative medical sources. Every result includes educational context and a disclaimer.

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BMI Calculator

Calculate Body Mass Index in metric (kg/cm) or imperial (lbs/ft). Includes WHO classification, ideal weight range, BMI Prime, and South Asian threshold.

WHO verifiedMetric + Imperial

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Calorie Calculator (TDEE)

Calculate your Total Daily Energy Expenditure based on age, gender, weight, height and activity level. Includes calorie targets for weight loss, maintenance and gain.

Mifflin-St JeorActivity factors

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Body Fat Calculator

Estimate body fat percentage using the US Navy method (neck, waist, hip measurements). More accurate than BMI alone.

US Navy methodMen + Women

Health numbers everyone should know

These are the four numbers your doctor checks first. Know them before your appointment.

Measurement	Healthy range	Tool to check
BMI	18.5 – 24.9 (WHO) \| 18.5 – 22.9 (South Asia)	BMI Calculator
Waist (women)	Below 80 cm (low risk per WHO)	Tape measure
Waist (men)	Below 94 cm (low risk per WHO)	Tape measure
Daily calories	Varies by age, gender, activity level	Calorie Calculator

Disclaimer: All health calculators are for informational and educational purposes only. Results do not constitute medical advice. Consult a qualified healthcare provider for personalised health guidance.