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BMR Calculator

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Results

Basal Metabolic Rate (BMR)
1,717 Calories/day
Formula: Mifflin-St Jeor • Energy at Complete Rest
Mifflin-St Jeor
1,717 kcal
Harris-Benedict
1,772 kcal
Katch-McArdle
1,655 kcal
Daily Calorie Expenditure by Activity Level
Activity Level Multiplier Calories / Day
Sedentary
Little or no exercise
 1.2 2,060 kcal
Lightly Active
Exercise 1-3 times/week
 1.375 2,361 kcal
Moderately Active
Exercise 4-5 times/week
 1.55 2,661 kcal
Very Active
Daily exercise or intense exercise 3-4 times/week
 1.725 2,962 kcal
Extra Active
Intense exercise 6-7 times/week or physical job
 1.9 3,262 kcal
Related: Calorie Calculator • Calories Burned • BMI

About Basal Metabolic Rate (BMR)

Basal Metabolic Rate is the amount of energy (in calories) your body needs while resting in a neutrally temperate environment to keep your vegetative functions operating, such as the heart beating, lungs breathing, nervous system regulating, and kidneys filtering waste.

Mifflin-St Jeor

Widely recognized by the Academy of Nutrition and Dietetics as the most accurate estimation equation.

Revised Harris-Benedict

Updated by Roza and Shizgal in 1984. Frequently used in clinical research and metabolic studies.

Katch-McArdle

Calculates resting energy expenditure strictly from Lean Body Mass (LBM), perfect for athletic builds.

Understanding your calculation

Method, example and limitations

How the calculation works

Basal metabolic rate estimates energy used at rest from a selected equation. Height, weight, age and the equation settings influence the estimate; activity adjustments represent a separate step.

Example to check

For Mifflin–St Jeor using the male equation, age 30, 70 kg and 175 cm gives 10×70 + 6.25×175 − 5×30 + 5 = 1,648.75 kcal/day at rest.

Before using the result

This is not a calorie prescription. Illness, pregnancy, age, body composition and activity can change actual energy needs; a clinician or dietitian can assess individual needs.

Calculation methodology · Report a result that needs review