Basal Metabolic Rate Calculator

Online calculation of BMR for health and fitness measurement. Calculate Your Basal Metabolic Rate Online With This Instant BMR Calculator.
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Basal Metabolic Rate - BMR

Basal Metabolic Rate is a measurement of the total number of calories used by a body at rest to sustain life. Basically, it is the number of calories needed for someone to do nothing all day and remain alive. On average, the BMR accounts for up to 70% of all the expended calories burned during the day although this figure may vary dependant upon factors such as height, age, pregnancy and other factors.

BMR Calculator

To calculate your own BMR use the free basal metabolic rate calculator below.

KCal Calculator

Physical characteristics

Age (in years)

Weight (in pounds)

Height (in inches)



BMR kcal/day for men kcal/day for women

BMR can also be estimated as 70 W0.75 = kcal/day,
where W is body weight in kilograms.
Physical activity, minutes/day
Very Light Light Moderate Heavy Very Heavy

Examples include:
Reading
Sitting
Driving
Eating

Examples include:
Walking
Sweeping
Playing Piano
Bicycling (easy)

Examples include:
Fast walk
Dancing
Ping-Pong
Skating

Examples include:
Swimming
Running
Bicycle Race
Basketball

Examples include:
Boxing
Rowing
Mountain climbing
Total Energy Requirement


kcal/day for men


kcal/day for women

Factors Affecting BMR

  • Age - it is generally true that older people have a lower BMR than younger people. BMR correlates directly with an individual's level of lean body tissue. as this tends to decrease with age, so too does the BMR. Diet and exercise can increase the BMR again by lowering body fat.

  • Height - taller people have higher basal metabolic rates.

  • Pregnancy - BMR is higher in pregnant subjects.

  • Illness - Malfunction of the thyroid gland can cause BMR to increase or decrease by as much as twice normal levels. General illnesses such as fever and hormonal imbalance can also affect BMR in the short term.

  • Dieting - The reason why dieting needs to be accompanied by exercise. Fasting lowers BMR which soon reduces the effectiveness of being on a diet. Exercise lowers non-lean body mass which also raises BMR making dieting more effective.
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