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Health & fitness / BMR

BMR Calculator

Estimate basal metabolic rate, the energy used at rest, from age, height, weight, and the Mifflin–St Jeor equation. Use it as an estimate of resting needs before adding daily movement or exercise. Mifflin–St Jeor: men 10W+6.25H−5A+5; women 10W+6.25H−5A−161, where W is kg, H is cm, and A is years. This estimates resting energy only; walking, work, exercise, and digestion add to total daily expenditure.

Your inputs

Make it your own
Calculator settings
kg

cm

years

Your result
1,426.5
kcal/day
Estimated resting energy expenditure

Mifflin–St Jeor estimate; an equation, not a measurement.

Example inputs shown. Adjust them to explore.

A familiar situation

Separate estimated resting energy from movement when reviewing a daily calorie plan.

How to use this calculator

  1. Enter weight, height, age and the remaining inputs.
  2. Select Calculate to see the answer and its breakdown.
  3. Keep a scenario, change an input and compare the results.

Use consistent units and check the assumptions below before applying the result.

How bmr is calculated

Mifflin–St Jeor: men 10W+6.25H−5A+5; women 10W+6.25H−5A−161, where W is kg, H is cm, and A is years. This estimates resting energy only; walking, work, exercise, and digestion add to total daily expenditure. At 70 kg, 170 cm, and 35 years, the female-coefficient estimate is 1,402.5 kcal/day.

Mifflin–St Jeor: 10W+6.25H−5A+5 (male) or −161 (female).
A worked example

At 70 kg, 170 cm, and 35 years, the female-coefficient estimate is 1,402.5 kcal/day.

Assumptions & useful context

Mifflin–St Jeor estimate; an equation, not a measurement.

Health calculations are estimates for education. They cannot diagnose a condition or replace a clinician’s assessment. Individual needs vary, especially during pregnancy, illness and growth.

Frequently asked questions

Is BMR the same as total daily energy expenditure?

No. Total expenditure also includes activity and digestion.

Can an equation measure my metabolism?

No. Indirect calorimetry is needed for a measurement.

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