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BMR × activity factor

TDEE Calculator

Estimate Total Daily Energy Expenditure as adult BMR times a labeled activity multiplier. The factor is a planning assumption.

Your numbers

Estimated TDEE

BMR × a documented activity factor. The factor is a planning assumption.
yearsAdult estimate, 18–80
lb
in

Estimated TDEE

2,112 kcal/daySedentary × BMR
Estimated BMR1,760 kcal
Activity factor1.2

Activity multipliers are conventional planning factors, not a measurement of your metabolism.

How we got this
  1. Estimated BMRMifflin–St Jeor1,760 kcal/day
  2. Activity factorSedentary: Little or no exercise1.2
  3. Estimated TDEE2,112 kcal/day
What we assumed
  • This is a formula-based estimate for adults, not a diagnosis or medical advice.
  • Population-level equations can be a poor fit for children, pregnancy, elite athletes, and some clinical populations.
  • Talk with a clinician before using a number like this to make a health decision.
  • Estimated BMR uses the Mifflin–St Jeor equation for adults. It is not a measured metabolic rate.
  • Activity multipliers are conventional planning factors, not individualized physiology.
Technical details

Method tdee-v1.0.0Data Manual inputs / fixed rules

Guide

TDEE as BMR times an activity factor

CostAnswer editorialIndependent calculator publisher

Total Daily Energy Expenditure here is adult BMR × a labeled activity multiplier. The multiplier is a planning assumption, not a GPS of your week.

Activity factors are coarse

“Sedentary” versus “active” hides a lot of jobs and training. If you sit at a desk and lift three evenings, you are not a single textbook category. Treat the result as a starting calorie budget to compare with intake, not as a prescription.

Questions about this calculator

Which activity level should I pick?

Pick the label that matches most of your week, then be willing to adjust. The factor is not computed from step counts.

Does a step count change TDEE here?

No. There is no wearable import. The multiplier is the label you choose. If your weight is drifting, the label or the BMR inputs are a poor fit, not a prompt to invent a custom factor.

Is TDEE a meal plan?

No. It is BMR times a documented activity factor. The calorie page can apply a small offset. Neither page is nutrition therapy.

Terms used here

TDEE
Estimated total daily energy expenditure: BMR × activity factor on this page.
Activity factor
A documented multiplier. It is an assumption, not a measurement.

Practical tips

  • The calorie calculator adds an optional small offset for a goal; TDEE itself is the maintenance-style estimate.

Limits and caveats

  • Formula estimate. Not medical advice and not a diet.

Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.

Engine notes

Rounding, versioning, and omissions that sit beside the guide rather than repeating it.

  • BMR first. The same Mifflin–St Jeor adult estimate used on the BMR page is computed once, then multiplied.
  • Activity factors. Sedentary 1.2, light 1.375, moderate 1.55, active 1.725, very active 1.9. These are labeled planning factors, not measured expenditure.
  • Limits. Pick the factor that most honestly matches weekly movement. The product is still an estimate.

Calculation receipt

What each number here is

This answer is arithmetic on what you enter. No outside dataset is involved, so nothing here can go out of date.

TDEE is BMR × activity factor.

Sources

Where this data comes from

Mifflin MD, St Jeor ST, et al.Resting-energy equation reused as the TDEE base.Peer-reviewed equation ↗

Next

People working through body and energy estimates usually need these next.

HealthBMREstimate adult Basal Metabolic Rate with the Mifflin–St Jeor equation. This is not a measured metabolic rate.HealthDaily caloriesEstimate daily calories from adult BMR and a documented activity factor. Maintenance is the primary result; optional offsets stay small.HealthBMIEstimate adult Body Mass Index from height and weight in metric or U.S. units. Category labels are secondary CDC screening ranges, not a diagnosis.HealthBody fatEstimate body-fat percentage from neck, waist, and hip circumferences using the documented U.S. Navy method. Not a DEXA scan.