Your BMR (basal metabolic rate) is the rate at which you expend calories while resting. This rate assumes you're resting at room temperature during the post-absorptive stage of digestion, meaning that you've fasted for about 12 hours. The BMR usually is measured under highly controlled conditions as part of a scientific test. However, you can estimate your BMR from your age, height, weight and gender, based on your resting metabolic rate (RMR). The formula follows.
Step 1
Weigh yourself in kilograms. You also can weigh yourself in pounds and divide this value by 2.205 to obtain your weight in kilograms.
Step 2
Measure your height in centimeters. You also can measure yourself in inches and multiply this value by 2.54 to obtain your height in centimeters.
Step 3
Estimate your BMR if you're male. This is given by the equation RMR = (9.99 x weight in kg) + (6.25 x height in cm) - (4.92 x age in years) + 5. This equation provides a man's BMR in calories per day.
Step 4
Estimate your BMR if you're female. This is given by the equation RMR = (9.99 x weight in kg) + (6.25 x height in cm) - (4.92 x age in years) - 161. This equation provides a woman's BMR in calories per day.
Tips and Warnings
- An example calculation for a 55-year-old female weighing 59 kilograms who is 168 centimeters tall: RMR = (9.99 x w) + (6.25 x h) - (4.92 x a) - 161 = (9.99 x 59) + (6.25 x 168) - (4.92 x 55) - 161 = 1,749 calories per day.
Things You'll Need
- Tape measure
- Scale
- Calculator
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