Calorie calculator
Mifflin–St Jeor BMR from mass, height, age, and sex, then activity multipliers for a rough daily energy estimate.
Defaults to your region. Switch to compare any other scale.
Current default for BMR in clinical calculators.
Result
2,123
Daily target
kilocalories
- BMR1,370 kcal
- TDEE (maintenance)2,123 kcal
Estimate, not a prescription
Equations miss lean mass and hormones. A 500 kcal swing is common. Medical conditions need a clinician.
About this tool
This calorie calculator estimates basal metabolic rate (BMR) with the Mifflin–St Jeor equation, then scales it by activity to approximate total daily energy expenditure (TDEE). Inputs are sex, age, height, weight, and how active your week usually is.
BMR is the energy your body would use at rest; TDEE adds movement. Use the surplus or deficit hints only as rough planning bands — they are not medical prescriptions. Athletes, pregnancy, and some conditions need clinician guidance rather than a generic multiplier.
Compare with the BMI page if you also track body-mass categories. Formulas are cited on the page; treat outputs as educational estimates.
Formula
Male BMR = 10×kg + 6.25×cm − 5×age + 5Female BMR = 10×kg + 6.25×cm − 5×age − 161TDEE = BMR × activity
How it is calculated
- Enter sex, age, height, and weight (metric or imperial).
- Compute BMR with Mifflin–St Jeor.
- Multiply by the activity factor, then apply a deficit or surplus.
Questions
Why Mifflin–St Jeor?
It outperforms Harris–Benedict for most modern adults in validation studies and is the default in many clinical tools.
Are the results official advice?
No. Calculate This is an educational tool and does not diagnose anything. For decisions about your health, talk to a doctor or another qualified professional.