Calorie calculator
Get a starting estimate based on your age, height, weight and activity. It's free, and you can see your result without an email address.
What this number means
The calculator estimates the energy your body uses in a day. It adjusts that estimate for the goal you choose. Your result is a starting point: activity, health, and changes in your routine can affect what you need.
The starting formula is the Mifflin-St Jeor equation, which estimates resting energy needs in adults. Activity and goal adjustments add more uncertainty. Read how we calculate for the method and limits.
Common questions
How accurate is a calorie calculator?
It is an estimate, not a measurement of your metabolism. Your activity level and individual needs can make the real number different. A nutritionist can help you interpret it in the context of your health and routine.
Do I need to count every single thing I eat?
You can start by paying attention to regular meals, serving sizes and drinks. If you choose to log your meals, include the cooking oil and extras as well. Estimates will still vary with the recipe and portion.
Is this medical advice?
This tool gives general information for adults. If you're under 18, pregnant, breastfeeding or managing a medical condition, plan your food with a doctor or dietitian.