Health and wellness
Calculate adult body mass index from height and weight, with the standard screening category bands.
Adult inputs
Select units, activity, and a planning goal. The same inputs power BMI, BMR, TDEE, and calorie estimates.
Educational estimate only. BMI is a screening measure, and calorie or TDEE results are not medical advice.
Health estimate
BMI
24.49
Screening category
Standard reference range
BMR
1,508 kcal
Estimated TDEE
2,337 kcal
Planning calorie target
2,337 kcal
BMI reference weight range
56.7–76.3 kg
BMI does not measure body composition. TDEE is an estimate that can vary with activity, muscle mass, health, medications, and daily movement.
Interpret the estimate carefully
BMI, BMR, and TDEE provide a consistent starting point for tracking. They should be combined with real-world measurements and professional context rather than treated as a medical conclusion.
Formula assumptions
BMI uses kilograms and meters. BMR uses the Mifflin–St Jeor equation, and TDEE multiplies BMR by a broad activity factor. The calorie target uses a simple 500-kcal loss or 300-kcal gain adjustment with a 1,200-kcal floor.
Do not use this tool to diagnose, treat, or manage a health condition. Ask a qualified clinician for individualized guidance.
BMI and calorie questions
No. BMI is a screening metric and can be misleading for athletes, older adults, children, pregnancy, and different body compositions.
BMR estimates energy used at rest. TDEE applies an activity factor to estimate a typical full day.
No. Energy needs and weight change vary, and this simple estimate does not account for every personal or medical factor.
The BMI Calculator converts the inputs you provide into a documented estimate with visible assumptions.
Anyone who wants a quick planning check before opening a spreadsheet or consulting a qualified professional.
The calculation runs locally in the browser using a pure TypeScript calculation function and the selected assumptions.
BMI is a screening metric, not a diagnosis. It can be misleading for athletes, older adults, children, pregnancy, or different body compositions.
BMI is a screening metric, not a diagnosis. It can be misleading for athletes, older adults, children, pregnancy, or different body compositions.
No. The calculation is performed in your browser and the form does not send calculator inputs to a calculation service.
Quick jumps
Estimate BMR and total daily energy expenditure.
Estimate maintenance calories and a planning calorie target.
Compare waist and hip measurements with women and men screening bands using inches or cm, plus body shape, body fat, and NHS-style intent.
Health and wellness
Calculate adult body mass index from height and weight, with the standard screening category bands.
Adult inputs
Select units, activity, and a planning goal. The same inputs power BMI, BMR, TDEE, and calorie estimates.
Educational estimate only. BMI is a screening measure, and calorie or TDEE results are not medical advice.
Health estimate
BMI
24.49
Screening category
Standard reference range
BMR
1,508 kcal
Estimated TDEE
2,337 kcal
Planning calorie target
2,337 kcal
BMI reference weight range
56.7–76.3 kg
BMI does not measure body composition. TDEE is an estimate that can vary with activity, muscle mass, health, medications, and daily movement.
Interpret the estimate carefully
BMI, BMR, and TDEE provide a consistent starting point for tracking. They should be combined with real-world measurements and professional context rather than treated as a medical conclusion.
Formula assumptions
BMI uses kilograms and meters. BMR uses the Mifflin–St Jeor equation, and TDEE multiplies BMR by a broad activity factor. The calorie target uses a simple 500-kcal loss or 300-kcal gain adjustment with a 1,200-kcal floor.
Do not use this tool to diagnose, treat, or manage a health condition. Ask a qualified clinician for individualized guidance.
BMI and calorie questions
No. BMI is a screening metric and can be misleading for athletes, older adults, children, pregnancy, and different body compositions.
BMR estimates energy used at rest. TDEE applies an activity factor to estimate a typical full day.
No. Energy needs and weight change vary, and this simple estimate does not account for every personal or medical factor.
The BMI Calculator converts the inputs you provide into a documented estimate with visible assumptions.
Anyone who wants a quick planning check before opening a spreadsheet or consulting a qualified professional.
The calculation runs locally in the browser using a pure TypeScript calculation function and the selected assumptions.
BMI is a screening metric, not a diagnosis. It can be misleading for athletes, older adults, children, pregnancy, or different body compositions.
BMI is a screening metric, not a diagnosis. It can be misleading for athletes, older adults, children, pregnancy, or different body compositions.
No. The calculation is performed in your browser and the form does not send calculator inputs to a calculation service.
Quick jumps
Estimate BMR and total daily energy expenditure.
Estimate maintenance calories and a planning calorie target.
Compare waist and hip measurements with women and men screening bands using inches or cm, plus body shape, body fat, and NHS-style intent.