BMR calculator
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Mifflin-St Jeor: 10 × kg + 6.25 × cm − 5 × age − 161 = 1,345.
- Revised Harris-Benedict (1984) gives 1,408.
- BMR is the energy the body uses at complete rest; it is an estimate and individuals differ.
| Inputs | Answer |
|---|---|
| Units: Metric (cm, kg); Sex: Female; Age: 35; Height: 165; Weight: 65 | Your estimated basal metabolic rate is 1,345 calories a day (Mifflin-St Jeor). |
| Units: Metric (cm, kg); Sex: Male; Age: 28; Height: 182; Weight: 80 | Your estimated basal metabolic rate is 1,803 calories a day (Mifflin-St Jeor). |
| Units: US (inches, pounds); Sex: Male; Age: 45; Height: 70; Weight: 190 | Your estimated basal metabolic rate is 1,753 calories a day (Mifflin-St Jeor). |
How to use it
Basal metabolic rate is the energy your body uses at complete rest to keep you alive. The Mifflin-St Jeor equation estimates it as 10 × weight (kg) + 6.25 × height (cm) − 5 × age + 5 for men or − 161 for women. The revised Harris-Benedict equation (1984) is shown for comparison.
Your total daily burn is higher because of movement and exercise: multiply BMR by an activity factor, or use the TDEE calculator. The result is an estimate; individuals differ by several hundred calories. This is general information and an estimate, not medical advice; talk to a healthcare professional about your own situation.
Frequently asked questions
What is BMR?
The calories your body burns at rest.
Which BMR formula is more accurate?
Mifflin-St Jeor is widely used for healthy adults; both are estimates.
How do I get from BMR to daily calories?
Multiply by an activity factor; see the TDEE calculator.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
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General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.