Mifflin–St Jeor Calculator.
Estimate resting energy from age, height, weight and a sex coefficient. This tool keeps the Mifflin equation selected.
Your energy at rest
Resting energy is only part of your daily needs. It is not a daily food target.
Calculated from: 65.0 kg · 168 cm · 30 years
10W + 6.25H − 5A − 161
Compare all resting equations →How the Mifflin–St Jeor equation works
Use weight W in kilograms, height H in centimetres and age A in years. The male coefficient gives 10W + 6.25H − 5A + 5; the female coefficient gives 10W + 6.25H − 5A − 161. Imperial inputs are converted first. Body-fat percentage does not change this page’s equation.
Male coefficient, age 30, 80 kg, 180 cm: 800 + 1,125 − 150 + 5 = 1,780 kcal/day
This is resting energy, not a daily food prescription. Open the daily calorie calculator to add an activity assumption, or inspect a lean-mass approach in the Katch calculator. Binary coefficients are a simplification of the published equation and do not fit everyone.
Methods & references
An informational tool; no medical review is claimed. Activity factors and caution thresholds are product planning conventions. Citations do not imply endorsement.
Use the estimate as a starting point.
Track weight and intake under consistent conditions for a few weeks. Adjust the estimate to match your longer-term trend.
Keep your plan connected.
Use the same details across your nutrition tools.
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Find your daily calorie needs.
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Plan a percentage-based calorie deficit.
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Explore toolBMI calculator
Calculate adult BMI and reference ranges.
Explore toolProgress journal
Track body weight and calorie intake.
Explore toolFind your baseline
Enter your details and choose the activity level that looks like an ordinary week.
Choose a direction
Maintain, lose, or gain. Use a manageable change rather than chasing the lowest number.
Check the bigger picture
Track consistent observations over a few weeks. Adjust as your needs change.
How the calculator works
Equations, assumptions and limitations.
Does Mifflin–St Jeor require body-fat percentage?
No. It uses kilograms, centimetres, age and a sex coefficient. This page keeps Mifflin selected even if another tool saved a body-fat value.
Is my Mifflin result how many calories I should eat?
No. It estimates resting energy. Total daily needs also include movement, exercise and the thermic effect of food. Use the TDEE calculator to choose an activity factor.
Does the equation work for everyone?
It predicts from population data rather than measuring you. This tool is for generally healthy adults and does not support children, pregnancy, breastfeeding or medical nutrition therapy.