Free public tool
TDEE Calculator
Estimates resting energy expenditure with the Mifflin-St Jeor equation, then multiplies by an activity factor for total daily energy expenditure.
Purpose & limitations
Prediction equations carry ±10% or greater individual error. Body composition, thermogenesis, and adaptive changes are not captured — treat the output as a starting point and adjust from measured trends.
Inputs & validated ranges
| Input | Unit | Accepted range |
|---|---|---|
| Sex (for the equation) | choice | 2 options |
| Age | years | 18–100 |
| Body weight | kg | 30–250 |
| Height | cm | 120–230 |
| Activity level | choice | 5 options |
Formula & methodology
BMR (male) = 10×weight + 6.25×height − 5×age + 5. BMR (female) = 10×weight + 6.25×height − 5×age − 161. TDEE = BMR × activity factor (1.2–1.9).
Worked example
Male, 35, 80 kg, 178 cm: BMR = 800 + 1112.5 − 175 + 5 = 1742.5 kcal. Moderate activity: 1742.5 × 1.55 ≈ 2701 kcal/day.
References
- Mifflin MD, St Jeor ST, Hill LA, et al. (1990). A new predictive equation for resting energy expenditure in healthy individuals. American Journal of Clinical Nutrition. SourceValidation study
- Frankenfield D, Roth-Yousey L, Compher C (2005). Comparison of predictive equations for resting metabolic rate in healthy nonobese and obese adults. Journal of the American Dietetic Association. SourceSystematic review
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