Calculator › BMR

BMR Calculator (kJ and Cal)

Your Basal Metabolic Rate is the energy your body uses at complete rest to breathe, circulate blood and keep organs working.

Sex
yrs
cm
kg

What does BMR mean for weight loss?

BMR typically makes up 60–70% of the energy you burn each day. It is the floor for a safe diet: eating well below it for long periods risks muscle loss and nutrient gaps. Multiply it by an activity factor to get your TDEE, then use the calorie deficit calculator to set a target.

Formula

Men: 10 × kg + 6.25 × cm − 5 × age + 5
Women: 10 × kg + 6.25 × cm − 5 × age − 161

The result is in Calories (kcal). Multiply by 4.184 for kilojoules. See how it works for details.