BMR & Calorie Calculator
Estimate daily calories from BMR and activity.
Estimate your Basal Metabolic Rate (BMR) — the calories your body burns at rest — and your total daily energy expenditure (TDEE) based on activity level, using the accurate Mifflin-St Jeor equation. Includes calorie targets for losing or gaining weight.
Lose weight (−500)
1,479 kcal/day
Gain weight (+500)
2,479 kcal/day
Runs entirely in your browser — nothing is uploaded.
How to use the bmr & calorie calculator
- 1Choose metric or imperial and enter age, sex, height, and weight.
- 2Pick your activity level.
- 3See your BMR, maintenance calories, and goals.
Frequently asked questions
What's the difference between BMR and TDEE?
BMR is the energy you burn at complete rest; TDEE multiplies BMR by an activity factor to estimate the calories you burn in a full day.
How accurate is this?
The Mifflin-St Jeor equation is one of the most accurate estimates, but individual needs vary — treat it as a starting point.