🚶 TDEE Calculator
How It Works
Estimate total daily energy expenditure from BMR and activity level. Use the estimate as a general starting point and review the assumptions behind it. Use TDEE Calculator as a general estimate from the measurements and assumptions you enter.
The result is most useful when the inputs match the definitions used by this calculator. For this tool, the underlying method is: TDEE = BMR × Activity Factor. Compare the output with the worked example, then change one meaningful input at a time to see how the result responds.
What Is TDEE?
TDEE, or Total Daily Energy Expenditure, is an estimate of the energy a person uses in a typical day. It is commonly modeled from resting energy expenditure and an activity assumption.
How to interpret the result: Compare the output with the worked example and with another scenario using the same definitions. For this calculator, the key relationship is TDEE = BMR × Activity Factor.
How to Calculate TDEE
The page uses the method shown in the Formula section: TDEE = BMR × Activity Factor. Keep the inputs in matching units, then change one meaningful input at a time when testing scenarios.
Important limitation: TDEE is an estimate rather than a direct measurement. Real energy needs vary with body composition, activity, adaptation, and individual circumstances. Review the tdee inputs and units before relying on the result.
TDEE vs BMR
BMR or another resting-energy estimate describes energy use at rest under a defined model. TDEE adds an activity assumption to estimate total daily energy expenditure.
Activity level matters
Changing the activity assumption can materially change the TDEE estimate. Choose the description that best matches typical activity rather than selecting the highest category automatically.
Use TDEE as a starting estimate
Actual energy expenditure varies between people and over time. Comparing the estimate with weight and performance trends can provide context, but the calculator is not a direct metabolic measurement.
When to Use This Calculator
Use TDEE Calculator as a general estimate from the measurements and assumptions you enter.
Practical tip: For this TDEE Calculator, use the result as a starting estimate and change one measurement or activity assumption at a time so you can see how sensitive the estimate is.
Formula
TDEE = BMR × Activity Factor
Example
TDEE is estimated by multiplying BMR by an activity factor. Use the calculator to test a second scenario and see how the result changes when one important assumption is adjusted.