Quick guide
How to use this calculator
- Use the labels and unit notes to enter the requested measurement, date, time, or observation exactly as recorded.
- Check the visible method, population, and unit basis before using the result; switch modes rather than converting values mentally.
- Read the calculation audit and limitations together. The result supports measurement or tracking and does not replace diagnosis, treatment, or urgent medical assessment.
Calculation method
How the total daily energy expenditure calculator works
Estimated TDEE = entered resting energy multiplied by the entered activity factor.
TDEE is an equation-based estimate. The visitor chooses the activity factor; 365CALCS does not infer activity from vague lifestyle labels.
Worked example
Total Daily Energy Expenditure example
An entered REE of 1,600 kcal/day and factor 1.5 produce an estimated 2,400 kcal/day.
Estimated TDEE = entered resting energy multiplied by the entered activity factor.
Supported inputs
Precision and limits
Supported purpose
Not measured calorimetry or doubly labelled water. Do not use as a clinical feeding prescription or guaranteed maintenance intake.
Measurement quality
The output is only as reliable as the entered measurement, device, timing, units, and applicable reference population. Recheck unexpected values against the original record.
Clinical boundary
This calculator does not diagnose a condition, choose treatment, change medication, or determine that an urgent symptom is safe to monitor at home. Contact an appropriate health professional or local emergency service when the situation may be urgent.
Privacy
Entered health values and results stay in this browser tab. They are not placed in URLs, analytics, logs, local storage, session replay, or a cloud record by this calculator.
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