BMI vs BMR Calculator
Two important health numbers, side by side. BMI tells you where your weight sits for your height; BMR tells you how many calories your body burns at rest. Compare them below.
Units
BMI — Body Mass Index
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Healthy range: —
BMI compares your weight to your height. It is a screening guide: 18.5–24.9 is the standard healthy range for adults.
BMR — Basal Metabolic Rate
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TDEE (daily calories): —
BMR is the calories your body burns at rest, calculated with the Mifflin-St Jeor formula. TDEE adds your activity level for a daily calorie estimate.
What each number means
- BMI — weight (kg) divided by height squared (m). It shows body-size category but not muscle versus fat.
- BMR — the energy your body needs for breathing, heartbeat, and cell repair if you rested all day.
- TDEE — BMR multiplied by your activity factor. Eat near this number to hold your weight, below it to lose, above it to gain.
These are estimates for general guidance, not medical advice. Talk to a health professional for personal advice.
How to use
- Pick metric or imperial units and enter your height, weight, age, and gender.
- Choose your activity level and press Calculate BMI and BMR.
- Compare the two cards: your BMI category and healthy range, and your BMR with daily calorie needs.
Frequently Asked Questions
BMI describes your body size from height and weight. BMR is the number of calories your body burns at rest to stay alive.
With the Mifflin-St Jeor formula, which uses your weight, height, age, and gender. It is the most widely used BMR estimate.
TDEE is your Total Daily Energy Expenditure: your BMR multiplied by an activity factor, a rough guide to your daily calorie needs.
Yes. The unit toggle switches between centimeters and kilograms, and feet, inches and pounds.
No. They are estimates for general guidance only. Talk to a health professional for personal advice.
Yes. It is completely free to use with no signup or account.