TDEE Calculator
TDEE stands for total daily energy expenditure, the calories a body uses in a typical day. This estimates it from your size, age and how active you are.
- Free
- Works offline after your first visit
- Saves on this device
- No sign-up
- Updated
How it works
First the resting rate is worked out with the Mifflin St Jeor formula, which uses weight, height, age and sex. Then that rate is multiplied by an activity factor, from mostly seated to very active.
This is an estimate for a typical adult. It does not measure body fat or muscle, and it cannot account for every day-to-day difference.
Worked example
At 40 years old, 66 in tall and 150 lb, the resting rate is 1,367 calories a day. With your activity level, the estimate comes to 1,880 calories a day.
Questions
Does this tell me what to eat?
No. It estimates how many calories a day the body uses. What you eat is a separate choice, and a doctor or dietitian can help with that.
Why does activity matter so much?
Activity adds more to the daily total than most people expect, so picking the level that fits a typical week gives a better estimate.
Why is sex part of the formula?
The formula uses different constants for men and women, so the choice changes the answer.
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- Calorie Deficit CalculatorDaily intake for a chosen calorie gap.
- Body Fat CalculatorEstimate from a tape measure, US Navy method.