Health & fitness
Basal metabolic rate
Estimate basal energy expenditure using the Mifflin–St Jeor equations.
Calculators / Health & fitness / Calorie needs
Calorie needs calculator
Estimate daily energy needs from a basal-energy estimate and activity factor.
On this page
Estimated daily energy need2,480kcal/day
Calculator controls
How to calculate
Estimate daily energy needs from a basal-energy estimate and activity factor.
Estimated daily energy need = bmr*activity
Worked example
Basal metabolic rate (kcal/day): 1600; Activity multiplier: 1.55.
Estimated daily energy need: 2,480 kcal/day.
Assumptions and limits
Energy needs vary with body composition, health, activity and measurement error. It is not a diet prescription.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Estimate daily energy needs from a basal-energy estimate and activity factor. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the calorie needs to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Basal metabolic rate (kcal/day) | Enter a number of at least 0.000001 and no more than 1000000000000. |
| Activity multiplier | Enter a number of at least 1 and no more than 2.5. |
Frequently asked questions
What should I check before using the calorie needs result?
Energy needs vary with body composition, health, activity and measurement error. It is not a diet prescription.
Is this calorie needs result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.