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Calorie Calculator
Estimate BMR and daily calorie needs using the Mifflin-St Jeor equation.
Examples
See what this tool can do.
Find your maintenance calories
See roughly how many calories keep your weight steady.
Plan a deficit
Get a target for losing about half a pound a week.
Tips & tricks
Get the most out of it.
- 1Pick the activity level that matches a typical week honestly.
- 2Use the numbers as a starting point and adjust to real results.
- 3For medical or dietary decisions, consult a professional.
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About Calorie Calculator
What this tool does
Calorie Calculator estimates your daily calorie needs (BMR and TDEE) and targets for losing or gaining weight.
How to use it
- Enter weight, height, age, sex and activity level.
- Read your BMR and maintenance calories (TDEE).
- Use the loss and gain targets to plan.
How it works
It calculates basal metabolic rate with the Mifflin–St Jeor equation, multiplies by an activity factor for maintenance, then adjusts by set amounts for weight-change targets.
Important considerations
- Estimates are general guidance, not medical or dietary advice.
- Individual needs vary with body composition, health and other factors.
Privacy
This tool runs entirely in your browser. Nothing you enter is uploaded to a server.
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Frequently asked questions
BMR is the energy your body uses at rest; TDEE is BMR plus your activity, i.e. roughly the calories to maintain your current weight.