Calories calculator

Estimate how many calories your body needs each day and each week. Adjust the goal to see a realistic starting target for maintaining, losing, or gaining weight.

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How this calories calculator works

It estimates your basal metabolic rate using the Mifflin–St Jeor equation, then applies your activity level to calculate total daily energy expenditure.

Daily vs. weekly calories

Your body does not reset at midnight. A weekly calorie target gives you flexibility: higher-calorie days can be balanced by lighter days while keeping the same weekly average.

This calculator provides general estimates, not medical advice. Calorie needs can vary with health conditions, pregnancy, medications, and body composition. Speak with a qualified healthcare professional for personalized guidance. This page contains affiliate links. If you make a purchase through one of these links, we may earn a commission at no additional cost to you.