BMR calculator
Basal Metabolic Rate (BMR) is the energy your body uses at complete rest to keep you alive. It’s the starting point for working out how many calories you need.
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How it’s calculated: Mifflin–St Jeor: 10×kg + 6.25×cm − 5×age + (male +5 / female −161). Estimates for educational use — not medical advice.
Frequently asked questions
- What is BMR?
- Basal Metabolic Rate is the number of calories your body burns at complete rest to power basic functions like breathing and circulation.
- What formula does this use?
- The Mifflin–St Jeor equation, which is widely regarded as one of the most accurate BMR estimates for the general population.
- How do I use my BMR?
- Multiply your BMR by an activity factor to estimate your Total Daily Energy Expenditure (TDEE) — the calories you burn in a typical day.