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TDEE Calculator

Use this TDEE calculator to review an educational health calculation for TDEE. The page returns estimated TDEE plus supporting values for estimated BMR used, activity factor, and activity level description; check.

Primary answer
Estimated TDEE
Inputs to verify
Age, Sex used by equation, and Height
Use type
Use as an estimate that depends on assumptions.
Keyword intent
TDEE calculator

Calculator

TDEE Calculator

Calculates estimated tdee from age, sex used by equation, height. Defaults are filled in so you can review a working example before changing inputs.

years

Adult Mifflin-St Jeor estimate; this packet stays within the original 19-78 year study range.

Choose the published Mifflin-St Jeor coefficient used for the estimate.

Use centimeters when height unit is cm, or total inches when height unit is in.

Choose centimeters or inches.

More inputs3 additional assumptions

Use kilograms when weight unit is kg, or pounds when weight unit is lb.

Choose kilograms or pounds.

Choose the broad activity factor used to multiply BMR.

Result

Result reflects the current submitted inputs.

  • Risk B
  • Reviewed 2026-05-26
  • 4 sources
Estimated TDEE2,907 kcal/day
Estimated BMR used1,876 kcal/day
Activity factor1.55
Activity level descriptionModerately active: moderate exercise or sports 3-5 days per week
Estimate noteTDEE is an adult maintenance-energy estimate, not a weight-loss, medical, pregnancy, or clinical nutrition plan.

Breakdown

Weight used
90 kg
Height used
183 cm
Activity factor
1.55
  • This calculator is for adult educational estimates only and is not medical or nutrition advice.
  • The accepted age range is 19-78 years to stay within the original Mifflin-St Jeor adult study range.
  • Activity factors are broad approximations and do not model body composition, non-exercise activity variation, pregnancy, lactation, clinical diets, medications, or medical conditions.
  • No calorie deficit, surplus, or diet plan is generated.
  • No intermediate rounding is applied; display calorie outputs round to whole kcal/day.

Accuracy notes

Risk level
B
Reviewed
2026-05-26
Sources
4
Primary result
Estimated TDEE

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

Categories

What the result means

Use Estimated TDEE as the headline answer for TDEE. Total daily energy expenditure estimate rounded to whole kcal/day for display. Treat the result as educational context, then read the limitations and assumptions before discussing it with a professional. Use estimated BMR used, activity factor, and activity level description to explain why estimated TDEE moved when an input changed. Record the inputs you used and verify any health concern with a qualified professional.

Estimated TDEETotal daily energy expenditure estimate rounded to whole kcal/day for display.
Estimated BMR usedMifflin-St Jeor BMR before applying the activity factor.
Activity factorSelected activity multiplier.
Activity level descriptionHuman-readable selected activity level.

Use the result this way

  1. Start with Estimated TDEE, then use supporting outputs only to explain the primary answer.
  2. Verify age, sex used by equation, and height before copying the result.
  3. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.
  4. Record the inputs you used and verify any health concern with a qualified professional.

User job

How to use this calculator

Use TDEE Calculator when you need estimated tdee, then use estimated bmr used and activity factor to check the context for general wellness education and preparing for a professional conversation.

Best for

  • Understanding a formula-based estimate
  • Seeing which inputs drive a health-related output
  • Reviewing a default example before entering your own age and sex used by equation.

Check before relying

  • Health formulas can be population-specific; do not use the result as diagnosis or treatment advice.
  • This calculator is for adult educational estimates only and is not medical or nutrition advice.
  • The accepted age range is 19-78 years to stay within the original Mifflin-St Jeor adult study range.
  • Source context: American Journal of Clinical Nutrition / PubMed, reviewed 2026-05-26.

Next useful step

  • Calorie CalculatorUse next when the body metric task needs estimated maintenance calories instead of estimated TDEE.
  • BMR CalculatorUse next when the body metric task needs estimated BMR instead of estimated TDEE.
  • Body Fat CalculatorUse next when the body metric task needs estimated body fat instead of estimated TDEE.

Formula

TDEE equals Mifflin-St Jeor BMR multiplied by a selected activity factor from 1.2 to 1.9. Key assumptions: This calculator is for adult educational estimates only and is not medical or nutrition advice. The accepted age range is 19-78 years to stay within the original Mifflin-St Jeor adult study range. Activity factors are broad approximations and do not model body composition, non-exercise activity variation, pregnancy, lactation, clinical diets, medications, or medical conditions.

  • TDEE equals Mifflin-St Jeor BMR multiplied by a selected activity factor from 1.2 to 1.9.
  • This calculator is for adult educational estimates only and is not medical or nutrition advice.
  • The accepted age range is 19-78 years to stay within the original Mifflin-St Jeor adult study range.
  • Primary source context: American Journal of Clinical Nutrition / PubMed.

Inputs

Enter age, sex used by equation, height, and height unit for general wellness education and preparation for a professional conversation. Before calculating, choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges. Age: Adult Mifflin-St Jeor estimate; this packet stays within the original 19-78 year study range. Sex used by equation: Choose the published Mifflin-St Jeor coefficient used for the estimate. Height: Use centimeters when height unit is cm, or total inches when height unit is in. Height unit: Choose centimeters or inches.

AgeAdult Mifflin-St Jeor estimate; this packet stays within the original 19-78 year study range.
Sex used by equationChoose the published Mifflin-St Jeor coefficient used for the estimate.
HeightUse centimeters when height unit is cm, or total inches when height unit is in.
Height unitChoose centimeters or inches.
WeightUse kilograms when weight unit is kg, or pounds when weight unit is lb.
Weight unitChoose kilograms or pounds.
Activity levelChoose the broad activity factor used to multiply BMR.

Example

Using the default inputs, TDEE Calculator returns estimated TDEE of 2,907. Adjust age, sex used by equation, height, and height unit to match your own scenario.

FAQ

How is estimated TDEE calculated here?

TDEE equals Mifflin-St Jeor BMR multiplied by a selected activity factor from 1.2 to 1.9. The first assumption to check is: This calculator is for adult educational estimates only and is not medical or nutrition advice.

What does Estimated TDEE mean for TDEE?

Treat the result as educational context, then read the limitations and assumptions before discussing it with a professional. Secondary values such as estimated BMR used, activity factor, and activity level description are there to explain the primary answer, not to replace it.

What should I enter for Age?

Adult Mifflin-St Jeor estimate; this packet stays within the original 19-78 year study range. Use years for this field. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.

How does Sex used by equation change estimated TDEE?

Choose the published Mifflin-St Jeor coefficient used for the estimate. Changing it can alter estimated TDEE because the formula uses the submitted inputs together. Also compare measurement method, formula population, age range, units, sex or activity assumptions, and clinical context.

Why does the TDEE example show 2,907 for estimated TDEE?

The default inputs produce 2,907 for estimated TDEE. Treat that as a format and scale check, then replace every default value with your own inputs.

Can the TDEE result diagnose or prescribe anything?

No. Use it as educational context only. Health formulas can depend on population, measurement method, age range, and clinical context.

Sources

Last reviewed: 2026-05-26

  • Reviewed 2026-05-26 · Source 1990-02
    A new predictive equation for resting energy expenditure in healthy individualsAmerican Journal of Clinical Nutrition / PubMed. BMR equation used before applying an activity factor.
    Scope
    Original Mifflin-St Jeor resting energy expenditure paper in healthy individuals aged 19-78.
    Supports
    BMR equation used before applying an activity factor.
  • Reviewed 2026-05-26 · Source 2016
    Estimating Resting Metabolic RateNCBI Bookshelf / Endotext. Implemented 9.99 weight coefficient, 6.25 height coefficient, 4.92 age coefficient, sex constants, and required input units for the BMR component.
    Scope
    Clinical reference table listing the Mifflin-St Jeor equation with kilograms, centimeters, age, and sex-specific constants.
    Supports
    Implemented 9.99 weight coefficient, 6.25 height coefficient, 4.92 age coefficient, sex constants, and required input units for the BMR component.
  • Reviewed 2026-05-26 · Source not listed
    Calorie CalculatorNational Academy of Sports Medicine. Activity factors 1.2, 1.375, 1.55, 1.725, and 1.9 and TDEE-style multiplication.
    Scope
    Fitness education resource that presents BMR x activity factor calorie estimates and common activity multipliers.
    Supports
    Activity factors 1.2, 1.375, 1.55, 1.725, and 1.9 and TDEE-style multiplication.
  • Reviewed 2026-05-26 · Source not listed
    Resting Metabolic Rate: Best Ways to Measure It and Raise It, TooAmerican Council on Exercise. Secondary confirmation of the implemented BMR coefficients, common activity-factor categories, and estimate limitations.
    Scope
    Fitness education article describing Mifflin-St Jeor coefficients and activity factors multiplied by BMR or RMR to estimate TDEE.
    Supports
    Secondary confirmation of the implemented BMR coefficients, common activity-factor categories, and estimate limitations.

Disclaimer

This health calculator is for educational body-metric estimates only. It does not diagnose, prescribe diet or treatment, or replace individualized advice from a qualified health professional.