🧠 BMR Calculator
How It Works
Estimate basal metabolic rate using the Mifflin-St Jeor equation. Use the estimate as a general starting point and review the assumptions behind it. Use BMR Calculator as a general estimate from the measurements and assumptions you enter.
The result is most useful when the inputs match the definitions used by this calculator. For this tool, the underlying method is: Men: 10W + 6.25H − 5A + 5; Women: 10W + 6.25H − 5A − 161. Compare the output with the worked example, then change one meaningful input at a time to see how the result responds.
Understanding BMR
BMR is a general health or fitness estimate based on the measurements and assumptions requested by the calculator. Health estimates are not diagnoses and can differ from an individual's actual needs or measurements. Review the bmr inputs and units before relying on the result.
When to Use This Calculator
Use BMR Calculator as a general estimate from the measurements and assumptions you enter.
Practical tip: For this BMR Calculator, use the result as a starting estimate and change one measurement or activity assumption at a time so you can see how sensitive the estimate is.
Formula
Men: 10W + 6.25H − 5A + 5; Women: 10W + 6.25H − 5A − 161
Example
A 30-year-old, 70 kg, 175 cm male has a BMR around 1,649 kcal/day.