Fitness
BMR Calculator
Basal metabolic rate via the Mifflin–St Jeor equation.
BMR
kcal/day
Amortization schedule
| # | Payment | Principal | Interest | Balance |
|---|---|---|---|---|
Worked example
Metric male, 70 kg, 175 cm, age 30: BMR = 10×70 + 6.25×175 − 5×30 + 5 = 700 + 1093.75 − 150 + 5 = 1648.75 kcal/day.
\[ BMR=10(70)+6.25(175)-5(30)+5=1648.75 \]
FAQ
Is this the Harris–Benedict equation?
No. This page uses Mifflin–St Jeor (1990), which is the formula printed in How it works. Harris–Benedict is an older resting-energy estimate and will not match these outputs.
Does BMR include exercise?
BMR is rest only. For daily intake including activity, use the calorie calculator (TDEE = BMR × activity factor).
Sources
Assumptions and limitations
These fitness results are not a medical diagnosis or treatment plan. They use the named screening formulas only and cannot replace advice from a qualified clinician.
Mifflin–St Jeor was derived from adult samples; it is not validated here for children, pregnancy, or clinical malnutrition.
Related calculators
More tools in Fitness and popular picks.