This resting metabolic rate calculator (RMR) estimates your rate — the calories burned at rest under normal conditions — using the Mifflin-St Jeor equation. Enter your details above.
Formula
Men: RMR ≈ 10×W + 6.25×H − 5×age + 5 Women: RMR ≈ 10×W + 6.25×H − 5×age − 161
RMR vs BMR
RMR is measured under less strict conditions than BMR and is usually a little higher, but the two are close and often used interchangeably.
Important
This tool is for general educational purposes only and is not medical advice, diagnosis, or treatment. It does not replace evaluation by a qualified healthcare professional — consult one for any health decision. Last updated: August 2026.
Frequently Asked Questions
What is resting metabolic rate?
The calories your body burns at rest during a normal day, slightly higher than basal metabolic rate.
How is RMR different from BMR?
BMR is measured under strict fasting and rest conditions; RMR is measured more loosely and runs a bit higher.
How do I use RMR?
Multiply by an activity factor to estimate total daily calorie needs for maintenance.