## About TDEE Calculator Site

TDEECalculator.io is the brainchild of some serious coders who are also fitness addicts Please read our **Privacy Policy** and **Terms of Use** for more details regarding our policies and stuff.

### Formulas Used

We calculate all the TDEE Calculations using the **Mifflin-St Jeor** formula to calculate an estimate of your **Basal Metabolic Rate**, and then we adjust the numbers to take your activity level into account.

#### Mifflin-St Jeor Equation

`Mifflin = (10.m + 6.25h - 5.0a) + s`

*m*is

*mass*in kg,

*h*is

*height*in cm,

*a*is

*age*in years,

*s*is +5 for males and -151 for females

#### Katch-McArdle Equation

Optionally, if you fill out the body fat percentage field, the calculator will instead use the Katch-McArdle Formula, which is the most accurate formula of all. If you don’t know your body fat %, you can pick up a pair of cheap body fat calipers online, or find a place (try **University Health departments**) that offers **DEXA** scans. DEXA scans are the gold-standard in determining your body fat percentage and generally cost between **$50 – $100**.

`Katch = 370 + (21.6 * LBM)`

where *LBM*is

*lean body mass*

#### Revised Harris-Benedict Equation

The revised Harris-Benedict equation has been in use since 1984, and we calculate this as well for those who want it.

`Harris-Benedict = (13.397m + 4.799h - 5.677a) + 88.362 (MEN)`

Harris-Benedict = (9.247m + 3.098h - 4.330a) + 447.593 (WOMEN)

*m*is

*mass*in kg,

*h*is

*height*in cm,

*a*is

*age*in years