TDEE Calculator Formula

Understand the math behind the tdee calculator. Each variable explained with a worked example.

Use the TDEE Calculator

Formulas Used

TDEE (Calories/day)

tdee = bmr * activity_factor

BMR (Calories/day)

bmr_display = bmr

Weekly Calories

tdee_weekly = bmr * activity_factor * 7

Variables

VariableDescriptionDefault
weight_lbsWeight(lbs)170
height_inches_totalHeight (total inches)(inches)70
ageAge(years)30
activity_factorActivity Level1.55
weight_kgDerived value= weight_lbs * 0.453592calculated
height_cmDerived value= height_inches_total * 2.54calculated
bmrDerived value= 10 * weight_kg + 6.25 * height_cm - 5 * age + 5calculated

How It Works

TDEE - Total Daily Energy Expenditure

TDEE = BMR x Activity Factor

TDEE represents the total calories you burn per day including exercise and daily activities.

Activity Factors

| Level | Factor | |---|---| | Sedentary | 1.2 | | Lightly active | 1.375 | | Moderately active | 1.55 | | Very active | 1.725 | | Extra active | 1.9 |

Worked Example

A 30-year-old male, 170 lbs, 70 inches, moderately active.

weight_lbs = 170height_inches_total = 70age = 30activity_factor = 1.55
  1. 01BMR = 10(77.1) + 6.25(177.8) - 5(30) + 5 = 1,737
  2. 02TDEE = 1,737 x 1.55 = 2,692 cal/day
  3. 03Weekly = 2,692 x 7 = 18,844 cal/week

Ready to run the numbers?

Open TDEE Calculator