Calculators & Converters
BMR & Calorie Calculator
The BMR & Calorie Calculator estimates your Basal Metabolic Rate -- the calories your body burns at complete rest -- using the widely-used Mifflin-St Jeor formula, then scales it by your activity level to estimate your total daily calorie needs.
This is a useful starting point for setting calorie targets, whether for weight maintenance, loss or gain.
How to Use the BMR & Calorie Calculator
- Open the BMR & Calorie Calculator.
- Select your gender, and enter your weight, height and age.
- Select your typical activity level.
- Read your estimated BMR and total daily calorie needs (TDEE).
Frequently Asked Questions
What's the difference between BMR and TDEE?
BMR is the calories your body burns at complete rest just to function. TDEE (Total Daily Energy Expenditure) multiplies BMR by an activity factor to estimate the calories you burn in a typical day, including movement and exercise.
How accurate is the Mifflin-St Jeor formula?
It's considered one of the more accurate general-purpose BMR formulas for most adults, but individual metabolism varies -- use this as a starting estimate, not a medical measurement.
Should I eat exactly my TDEE in calories?
TDEE is roughly your maintenance calorie level. To lose weight you'd typically eat below it, and to gain weight, above it -- consult a healthcare provider for personalized guidance.