To convert feet/inches to cm: (feet × 12 + inches) × 2.54
This BMR calculator estimates your basal metabolic rate — the calories your body burns at complete rest to keep you alive (breathing, circulation, temperature control). It also shows your total daily energy expenditure (TDEE) at different activity levels.
Formulas used
Mifflin-St Jeor (used for the main result): men = 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5; women = the same − 161.
Revised Harris-Benedict is shown for comparison. Mifflin-St Jeor is widely regarded as the more accurate of the two for most adults today.
Example
A 30-year-old man who weighs 65 kg and is 168 cm tall has a BMR of about 1,555 kcal/day.
BMR vs TDEE
BMR is only the energy used at rest. Your real daily need (TDEE) is BMR multiplied by an activity factor, from 1.2 for a mostly seated lifestyle to 1.9 for very heavy physical work. To plan weight loss or gain, use the Calorie Calculator.
Frequently asked questions
How accurate is BMR from a formula?
Formulas give a population-average estimate. Individual BMR can differ by around 10% or more because of muscle mass, genetics and health conditions.
Disclaimer: this tool is for general information only and is not medical or dietary advice.