33 · Calculators

Calorie Calculator

Enter your age, sex, height, weight and activity level for an estimate of the calories you need each day.

Sex
Units

An estimate for healthy adults, not medical advice.

Calories to maintain weight

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How to use the calorie calculator

  1. Choose your sex and units.
  2. Enter your age, weight and height.
  3. Choose the activity level that best fits a normal week.

How the estimate works

Your basal metabolic rate (BMR), the energy used at rest, is estimated with the Mifflin–St Jeor equation. It’s multiplied by an activity factor from 1.2 to 1.9 to estimate your total daily energy expenditure (TDEE): the calories that keep your weight stable.

An estimate, not advice

Real needs vary with body composition, health and genetics. The formula is for healthy adults and isn’t suitable during pregnancy. Talk to a doctor or dietitian before making big changes to how you eat.

Examples

Female, 32, 68 kg, 168 cm, light activity

1,937 kcal a day · BMR 1,409

Male, 40, 85 kg, 180 cm, moderate activity

2,759 kcal a day · BMR 1,780

Questions

How accurate is it?

Mifflin–St Jeor is one of the more accurate equations for most adults, but individuals can differ by 10% or more. Track your weight for a few weeks and adjust.

How big a deficit should I use?

About 250–500 kcal a day is a common, moderate target. Very low intakes aren’t recommended without medical supervision.

Is my data stored?

No. Everything is calculated in your browser.