# How to Calculate BMR (Basal Metabolic Rate) – BMR Formula and Online TDEE BMR Calculator

Basal Metabolic Rate or BMR refers to the amount of energy or calories needed for vital bodily functions over a 24 hours period in a state of rest. An indirect rough estimation of ones BMR is calculated using the Mifflin St Jeor Equation.

# The Formula

P – Total heat production.
m – Mass or weight in KG.
h – Height in CM.
s – Sex or gender: +5 for men and −161 for women.

###### Or Simplified:

BMR for men = 10 x weight (kg) + 6.25 x height (cm) – 5 x age (years) + 5
BMR for women = 10 x weight (kg) + 6.25 x height (cm) – 5 x age (years) – 161

Basal Metabolic Rate accounts for 70% of the TDEE – Total Daily Energy Expenditure. The remaining 30% expenditure comes from physical activity (roughly 20%) and thermogenesis or digestion of food (about 10%).

CM

KG

ft. in.

lbs.

# Related Subjects:

## 3 thoughts on “How to Calculate BMR (Basal Metabolic Rate) – BMR Formula and Online TDEE BMR Calculator”

1. Rusty says:

Useful calculator

2. Katia says:

That’s simple enough. Thank you.

3. Lance Conway says:

BMR is gender bias!?