Health & Fitness
TDEE Calculator
Estimate maintenance TDEE, adjusted daily intake, weekly energy balance, and a simplified modeled weight change over the selected horizon. The energy-budget diagram reconciles BMR, activity allowance, maintenance expenditure, and the entered surplus or deficit.
Estimated daily expenditure-
Daily intake target-
Weekly energy adjustment-
Modeled weight change-
Decision view
Resting baseline to daily energy target
Resting baseline to daily energy targetBMR expands through the activity multiplier to maintenance TDEE; the signed goal adjustment then produces the planning intake target.
Exact scenario comparisonActivity multiplier changes while all other entered assumptions remain constant.
| Activity multiplier | Estimated daily expenditure | Daily intake target | Weekly energy adjustment | Modeled weight change |
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How to use TDEE Calculator
- Start with a credible BMR estimate or measured resting expenditure and choose an activity factor that reflects normal weeks rather than an exceptional day.
- Enter a moderate signed adjustment: a negative number for a modeled deficit or a positive number for a modeled surplus.
- Compare the predicted intake and trend with several weeks of consistent body-weight, intake, training, sleep, and recovery observations.
Calculator guide
Understanding TDEE Calculator
Total daily energy expenditure converts a resting baseline into a daily planning estimate using an activity multiplier. This page keeps the multiplier and goal adjustment visible so maintenance expenditure is not confused with an intake target.
Calculation method
How the calculation works
Multiply BMR by the entered activity factor and add the selected daily energy adjustment for a planning target. Multiply entered BMR by the activity factor to estimate TDEE. Add the signed daily goal adjustment to obtain the intake target, multiply that adjustment by seven for weekly balance, and divide cumulative energy adjustment by 7,700 kcal/kg for the simplified weight-change model.
Calibration
Turn an equation into a personal working estimate
A predicted TDEE becomes more useful when it is checked against stable real-world data.
Worked situations
Practical examples
- A BMR of 1,650 kcal/day multiplied by 1.55 produces an estimated maintenance TDEE of 2,557.5 kcal/day.
- A −350 kcal adjustment produces a planning intake near 2,207.5 kcal/day and a weekly modeled deficit of 2,450 kcal.
- Across 12 weeks, the fixed 7,700 kcal/kg conversion implies about −3.82 kg, but real weight response will not be perfectly linear.
Better inputs
Useful tips
- Choose activity from actual average movement and training; occupation and non-exercise movement can matter more than workout duration.
- Use a rolling body-weight average rather than reacting to one day's water, glycogen, sodium, or gastrointestinal change.
- Re-estimate when body weight, training volume, work routine, medication, health, or recovery changes materially.
Before relying on the result
Limitations and common mistakes
- Activity multipliers are broad population heuristics and can overstate or understate individual expenditure.
- The weight-change conversion assumes a fixed energy equivalent and ignores metabolic adaptation, body-composition mix, and water shifts.
- The calculator does not set a medically appropriate intake floor or replace nutrition, eating-disorder, sports, or clinical guidance.
Reference
Key terms
- TDEE
- Estimated total energy used in a day from resting needs, movement, exercise, and food processing.
- Activity multiplier
- Factor applied to BMR to approximate total daily expenditure.
- Energy deficit
- Modeled intake below expenditure over a defined period.
- Energy surplus
- Modeled intake above expenditure over a defined period.
Important note
Calculated from the entered measurements using the displayed method. It is a general reference and does not replace diagnosis or individualized professional guidance.
Frequently asked questions
Which activity multiplier should I use?
Use the factor that best represents an ordinary full week, including work and general movement—not only formal exercise.
Why is modeled weight change negative?
A negative daily adjustment creates a negative cumulative energy balance, representing a simplified loss direction.
How often should TDEE be updated?
Revisit it after a meaningful weight or routine change, or when several weeks of consistent observations disagree with the estimate.
Does the calculator account for adaptive thermogenesis?
No. It holds the entered BMR and activity factor constant across the planning horizon.