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TDEE Calculator – Estimate Daily Calorie Needs

Estimate how much energy you use in a typical day from your body measurements and activity level. Choose metric or imperial units.

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years

Estimated total daily energy expenditure (TDEE)

–

kcal per day

Basal metabolic rate (BMR)

– kcal per day

This is a general estimate for adults, not medical advice. Individual energy needs vary.

Runs in your browser – your data never leaves your device Also available via our free API

How to use the TDEE Calculator

  1. 1 Choose metric or imperial units, then enter your age, height and weight.
  2. 2 Select the sex coefficient used by the equation and choose the activity level that best describes a usual week.
  3. 3 Read the estimated daily energy expenditure (TDEE) and resting energy estimate (BMR).

What does TDEE mean?

Total daily energy expenditure (TDEE) is an estimate of the energy your body uses across an average day, including resting needs and physical activity. A TDEE estimate is often used as a starting point for understanding approximate maintenance energy needs.

How this TDEE calculator works

The calculator first estimates resting energy with the Mifflin–St Jeor equation, which uses weight, height, age and a male or female equation coefficient. It converts pounds and inches to metric units before calculating when you choose imperial inputs. It then multiplies the resting estimate by a selected activity factor to estimate TDEE.

The original Mifflin–St Jeor study developed an equation to predict resting energy expenditure in healthy adults (study record on PubMed). Activity factors are broad estimates: the descriptions are guides, and real daily energy use can differ considerably from person to person.

Choosing an activity level

Think about your overall routine across a typical week, including work, walking and exercise. Select sedentary for little planned movement, light or moderate for regular activity, and active or very active for frequent hard training or a physically demanding routine. When in doubt, treat the result as a range-estimating starting point rather than an exact calorie prescription.

Use the result as an estimate

Energy expenditure formulas cannot measure your metabolism. Body composition, health, medications, sleep and other factors affect actual needs. The calculator is intended for general information for adults, not diagnosis or individualized nutrition advice. For pregnancy, adolescence, illness, recovery, or a medically managed diet, ask a qualified healthcare professional for guidance.

Frequently asked questions

What is TDEE?

TDEE means total daily energy expenditure: an estimate of the energy your body uses in a typical day, including resting needs and activity.

What formula does this TDEE calculator use?

It estimates resting energy with the Mifflin–St Jeor equation, then applies a selected activity factor. Both parts are estimates, and the activity factor is a broad guide.

Is TDEE the same as BMR?

No. BMR or resting energy estimates energy used at rest. TDEE also accounts for activity across the day, so it is usually higher.

How accurate is a TDEE estimate?

It is a useful starting estimate, not a measurement. Actual energy needs vary, and the chosen activity level can have a large effect on the result.

Can teenagers use this calculator?

This calculator is intended for adults. Energy needs during growth, pregnancy, illness or recovery should be discussed with a qualified healthcare professional.

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