# About

## 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