About the Calorie Calculator
How many calories do you burn in a day? This calculator estimates your Basal Metabolic Rate (BMR) — the energy your body uses at rest — and your Total Daily Energy Expenditure (TDEE) based on how active you are.
It then shows daily calorie targets to maintain your weight, lose weight at a steady pace, or gain weight. Results are estimates for general information and are not a substitute for advice from a doctor or other qualified health professional.
How to use the Calorie Calculator
- Enter your age, sex, height and weight.
- Pick the activity level that best matches a typical week.
- See your maintenance calories and the targets for losing or gaining weight.
Frequently asked questions
Which formula does this use?
The Mifflin-St Jeor equation, which studies show is the most accurate everyday formula for estimating BMR. Your BMR is then multiplied by an activity factor to estimate total daily calories.
How many calories should I cut to lose weight?
A deficit of about 500 calories a day typically leads to roughly 0.5 kg (1 lb) of weight loss per week. Very large deficits are hard to sustain and can cause muscle loss.
Why is my real result different?
Formulas estimate averages. Genetics, muscle mass, sleep and health conditions all affect metabolism, so track your weight for 2–3 weeks and adjust your intake.