BMR Calculator
BMR Calculator
Estimate the energy your body uses at rest.
How it works
This commonly named BMR calculator estimates resting energy expenditure using Mifflin–St Jeor. Resting energy and strictly measured basal metabolism are related but not identical.
Using this calculator
The equation uses a constant of +5 for males and −161 for females. Measurements are converted to kilograms and centimetres before the formula is applied.
What to keep in mind
The result is not a suggested food intake. Total daily expenditure also includes movement and other energy costs. Adults 20–100 only; not for pregnancy or breastfeeding.
Sources & further reading
Mifflin et al. · Resting energy equation (1990) ↗Frequently asked questions
Are my entries saved?
No. Calculator inputs remain in the current page and are cleared when you reload or leave. The tools do not upload your entries.
Why are results rounded?
The display is rounded for readability. Calculations use unrounded intermediate values. An estimate should not be interpreted as an exact measurement.