Calorie Calculator
Estimate your daily calorie needs (BMR and maintenance) from age, sex, height, weight, and activity.
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BMR / day
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Maintain
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Lose (−500)
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Gain (+500)
Calories per day (estimated)
How to use
- Choose metric or imperial units and enter your age, sex, height, and weight.
- Pick your typical activity level.
- See your BMR plus calories to maintain, lose, or gain weight.
Frequently asked questions
How are calorie needs calculated?
This uses the Mifflin-St Jeor equation for basal metabolic rate (BMR), then multiplies by an activity factor to estimate total daily energy expenditure (TDEE).
How many calories should I eat to lose weight?
A deficit of about 500 calories a day is a common target for roughly one pound of loss per week. Consult a professional before major diet changes.
🔒 This tool runs entirely in your browser. Nothing you enter is uploaded, logged, or stored.
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