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Health Calculators

BMR Calculator

Verified formula Updated Jun 2026 Private — runs on your device

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years
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Verified formula Private

Basal metabolic rate

1,649 kcal/day

For general information only — not financial, tax, legal or medical advice. Verify before you rely on it.

How to use the BMR Calculator

The BMR Calculator works out your basal metabolic rate in an instant. Enter gender, age and weight and the result updates as you type — it is free, needs no sign-up, and runs entirely in your browser so your figures stay private.

  1. Enter the gender.
  2. Enter the age.
  3. Enter the weight.
  4. Enter the height.
  5. Read off your basal metabolic rate — the calculator updates automatically, with no button to press.

Worked example

For example, with gender of 1, age of 30 years, weight of 70 kg and height of 175 cm, the basal metabolic rate is 1,649 kcal/day.

Inputs used
Gender 1
Age 30 years
Weight 70 kg
Height 175 cm
Results
Basal metabolic rate 1,649 kcal/day

Results are estimates for educational use, not professional advice.

Key terms explained

BMR
Basal Metabolic Rate — the calories your body burns at complete rest to maintain basic functions.

Frequently asked questions

Basal Metabolic Rate is the number of calories your body needs at complete rest to keep vital functions running — breathing, circulation and cell production. It is the largest part of your daily energy use.

It uses the Mifflin-St Jeor equation, widely regarded as the most accurate for healthy adults: BMR = 10×weight(kg) + 6.25×height(cm) − 5×age + 5 for men, and − 161 for women.

BMR is your resting calorie burn. Total Daily Energy Expenditure (TDEE) multiplies BMR by an activity factor to include movement and exercise — use a calorie calculator for that.

No. It is a statistical estimate. Real metabolism varies with body composition, genetics, hormones and health, so treat it as a starting point, not a precise measurement.

Enter the gender. Enter the age. Enter the weight. Enter the height. Read off your basal metabolic rate — the calculator updates automatically, with no button to press.

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For most adults, a healthy BMI is between 18.5 and 24.9. A BMI below 18.5 is classed as underweight, 25 to 29.9 as overweight, and 30 or above as obese. BMI is a quick screening tool, not a diagnosis — it does not distinguish muscle from fat.

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BMR Table: Basal metabolic rate by Age

Reference table of basal metabolic rate for BMR across a range of age values — exact, engine-computed figures you can read off at a glance.

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