Daily Calorie Needs Estimator
Estimate resting energy and daily maintenance calories for adults using age, height, weight and activity level.
Set your values
Adjust the values, then calculate your result.
How to use Daily Calorie Needs Estimator
- Enter the measurements or amounts in the fields above.
- Check that dimensions, rates and units match the labels.
- Select “Estimate daily energy” to see a clear estimate and the formula used.
How the daily calorie needs estimator works
Resting energy estimate uses the Mifflin–St Jeor predictive equation; estimated maintenance multiplies that result by the selected activity factor.
Check your measurements and assumptions
A population equation is not an individual measurement. Intended for adults in the age range studied; not for children, pregnancy, eating-disorder care or medical nutrition plans. Daily energy needs vary and a clinician or registered dietitian can provide individual guidance.
Review the estimate before you act
Compare this result with an independent measurement, supplier quote or institution guidance when the decision matters. Confirm that the units and assumptions match the labels above, and update the inputs when the conditions change. Keep a note of the values used so you can reproduce the estimate later. This calculator is a planning aid and does not replace professional, product-specific or local guidance.
How are daily calorie needs estimated?
The tool estimates resting energy from age, height, weight and equation option, then applies an activity multiplier. The result is approximate, not a prescribed intake.
Is input uploaded?
Processing takes place in your browser. This tool does not send your input or selected files to a conversion API.