What this tool does
This calculator estimates how many calories your body needs each day to maintain its current weight, using the well-regarded Mifflin-St Jeor equation. It accounts for your age, sex, height, weight and how active you are, giving a personalised daily figure rather than a generic number.
How to use this tool
- Enter your age and select your sex.
- Enter your height and weight.
- Choose your activity level.
- Read your estimated daily calorie needs to maintain weight.
Why it matters
Understanding your maintenance calories is the foundation of any sensible eating plan. It helps you set realistic targets, whether your goal is to maintain, gradually lose or gain weight, and removes the guesswork from how much you actually need.