TDEE Calculator — Total Daily Energy Expenditure
Estimate daily energy expenditure from an equation-based BMR and selected activity factor.
Formula and sources updated · Data sources · 2View algorithm, constants and default inputs (JSON)
Comparison
About this calculator
Estimate basal metabolic rate with the Mifflin–St Jeor equation, then multiply by a selected activity factor. Both steps are population-level estimates; this result is not a measured metabolism, prescribed calorie target or medical advice. The model is intended for adults and does not account for pregnancy or breastfeeding.
Worked example
calculated with the default values below
Weight 70 kg · Height 170 cm · Age 30 years · Sex Male · Activity level Lightly active (1-3 days/week) TDEE 2,224 kcal/day · BMR 1,618 kcal/day
Method and assumptions
TDEE = (10W + 6.25H − 5A + s) × k Mifflin–St Jeor equation; the bracket term is BMR (kcal/day). TDEE = BMR × k with the chosen activity factor. Estimate basal metabolic rate with the Mifflin–St Jeor equation, then multiply by a selected activity factor. Both steps are population-level estimates; this result is not a measured metabolism, prescribed calorie target or medical advice. The model is intended for adults and does not account for pregnancy or breastfeeding.
Data sources
Disclaimer
These calculators are for general information only and are not a medical device, a diagnosis or a treatment plan. Reference ranges describe populations, not individuals, and do not account for pregnancy, medication, disability or athletic training. Discuss your own situation with a qualified healthcare professional.
Implementation source
This record describes the implementation used by this page. It is not independent validation. External references, when available, support only the stated formula or definition; estimates and custom rules retain their own assumptions.
Formula and variables
TDEE = (10W + 6.25H − 5A + s) × k
- W
- Body weight (kg)
- H
- Height (cm)
- A
- Age (years)
- s
- Sex constant: +5 men, −161 women
- k
- Activity multiplier
- TDEE
- Daily energy expenditure
Mifflin–St Jeor equation; the bracket term is BMR (kcal/day). TDEE = BMR × k with the chosen activity factor.
Frequently asked questions
Are the activity factors individually measured?
No. The selected multiplier scales an estimated adult resting expenditure. It does not measure your activity or metabolism, and people with similar routines can differ. Use a representative routine and interpret the result as a planning estimate, not a prescribed calorie target.
What changes when I update my weight?
Weight enters the Mifflin–St Jeor term as 10 kcal/day per kilogram. Holding height, age, sex and activity constant, adding 1 kg increases estimated BMR by 10 kcal/day and TDEE by 10 × the activity factor. This arithmetic change is not a measured change in metabolism.
Which inputs and limits apply to TDEE Calculator — Total Daily Energy Expenditure?
Use the units shown beside each field. These are form limits, not recommended settings. Weight: 1–500 kg; Height: 50–250 cm; Age: 19–120 years TDEE = (10W + 6.25H − 5A + s) × k Mifflin–St Jeor equation; the bracket term is BMR (kcal/day). TDEE = BMR × k with the chosen activity factor. Estimate basal metabolic rate with the Mifflin–St Jeor equation, then multiply by a selected activity factor. Both steps are population-level estimates; this result is not a measured metabolism, prescribed calorie target or medical advice. The model is intended for adults and does not account for pregnancy or breastfeeding.
What is a complete worked example for Weight = 70 kg; Height = 170 cm?
Inputs: Weight = 70 kg; Height = 170 cm; Age = 30 years; Sex = Male; Activity level = Lightly active (1-3 days/week). Calculation: TDEE = (10W + 6.25H − 5A + s) × k. Results: TDEE = 2,224 kcal/day; BMR = 1,618 kcal/day.