Calorie Calculator

Your body burns a certain number of calories at rest (your basal metabolic rate, BMR) and more when you move. This calculator estimates both with the Mifflin-St Jeor equation, which studies have found to be the most accurate simple formula for most adults, then multiplies by your activity level to estimate your total daily energy expenditure (TDEE) and suggests targets for weight loss or gain.

How to use Calorie Calculator

1. Choose your sex, enter your age and pick metric or US units.
2. Enter your height and weight.
3. Choose the activity level that matches a typical week.
4. Read your BMR, maintenance calories and the targets for mild or steady weight loss and gain.

When it comes in handy

• Setting a starting calorie target before tracking food.
• Understanding why intake needs to change as weight changes.
• Feeding a result into the Macro Calculator.

Frequently asked questions

How accurate is it?

For most adults the Mifflin-St Jeor estimate is within about 10% of measured values, but individuals vary. Treat the number as a starting point: track your weight for two to three weeks and adjust.

Is it suitable for children, pregnancy or medical conditions?

No. It is designed for healthy adults. Children, pregnant or breastfeeding women and people with medical conditions should get advice from a doctor or dietitian.