Total Daily Energy Expenditure.
So maintenance calories. The amount of food you have to eat to maintain body-weight taking into account how active you are (training, work, real life stuff, etc).
I recommend using this formula to calculate maintenance. It's the most accurate if you know how much bodyfat you're carrying or what your lean mass is.
The formula is as follows:
BMR = 370 + (9.79759519 X Lean Mass in pounds)
TDEE is calculated by multiplying your BMR by your activity multiplier from the list below:
- Sedentary = BMR X 1.2 (little or no exercise, desk job)
- Lightly active = BMR X 1.375 (light exercise/sports 1-3 days/wk)
- Mod. active = BMR X 1.55 (moderate exercise/sports 3-5 days/wk)
- Very active = BMR X 1.725 (hard exercise/sports 6-7 days/wk)
- Extr. active = BMR X 1.9 (hard daily exercise/sports & physical job or 2X day training, i.e marathon, contest etc.)