BMR Calculator: Basal Metabolic Rate
Enter sex, age, height and weight to see how many calories your body burns at complete rest in a day.
- Nothing you type is stored
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BMR (Mifflin-St Jeor)
1,620kcal/day
- Harris-Benedict (revised)
- 1,670 kcal/day
- Per hour at rest
- 67 kcal
An estimate for general information, not medical advice.
BMR is calories at complete rest. Your daily need is higher: see TDEE.
How to use
- Enter sex, age, height and weight.
- Optionally add body fat % under More options.
- Compare the BMR equations.
Good to know
Mifflin-St Jeor (1990): BMR = 10 × weight kg + 6.25 × height cm − 5 × age + 5 for men, or − 161 for women. It is the equation the US Academy of Nutrition and Dietetics found most accurate for healthy adults.
Harris-Benedict, revised by Roza and Shizgal (1984): men 88.362 + 13.397W + 4.799H − 5.677A; women 447.593 + 9.247W + 3.098H − 4.330A. It tends to read a little higher than Mifflin. Katch-McArdle: 370 + 21.6 × lean body mass (kg); it suits people who know their body fat %, such as athletes.
BMR is the energy for breathing, circulation and organs at rest, usually 60–70% of what you burn in a day. Multiply it by an activity factor to get your daily needs (see the TDEE calculator).
Questions
What is a normal BMR?
Roughly 1,200–1,500 kcal for many Indian women and 1,400–1,800 kcal for men, depending on size and age.
Should I eat my BMR calories to lose weight?
Not as a rule. BMR is less than you burn in a day. Use the calorie deficit calculator, which keeps you above safe minimums.
Why do the equations give different numbers?
They were built from different groups of people. Differences of 50–100 kcal are normal.
Does BMR drop with age?
Yes, a little every decade, mostly because of muscle loss. Strength training helps slow this.
Is my data stored?
No. Everything is calculated on your device.