TDEE Calculator
Estimate total daily energy expenditure by multiplying Mifflin–St Jeor BMR by a selected activity factor.
How to use
- Enter reference sex, age, weight, and height.
- Choose an activity level and calculate both BMR and TDEE.
Capabilities and scope
The runner offers factors 1.2, 1.375, 1.55, 1.725, and 1.9.
How it works
It computes Mifflin–St Jeor BMR first, then TDEE=BMR×activityFactor.
Example
A BMR of 1,600 kcal/day with factor 1.55 produces about 2,480 kcal/day.
Interpretation
Activity selection is limited to the five factor values implemented by the runner.
Useful for
- Establish a rough maintenance-energy starting point
- Compare how activity categories change the estimate
Before you use it
- Activity factors are broad averages and actual needs can differ substantially by work, exercise, and health status.
Standards and references
Frequently asked questions
Is this the same as calories reported by a smartwatch?
No. This is an equation-based estimate using body inputs and a categorical activity factor.