Calorie Calculator
Estimate how many calories you need per day to maintain your current weight, using the Mifflin-St Jeor formula.
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Maintenance
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How to use the Calorie Calculator
- Enter your age, sex, weight, and height.
- Choose the activity level that best matches your week.
- Read your maintenance calories, plus rough deficit/surplus targets.
Frequently asked questions
What formula is used?
The Mifflin-St Jeor equation, widely considered one of the most accurate for estimating resting metabolic rate, multiplied by an activity factor.
How much should I eat to lose weight?
A common approach is a ~500 kcal/day deficit from maintenance, which is shown automatically in your result.