Before calculating
Prepare Sex used by the equation, Age, Height, Additional height, Weight and Activity level. Match each input to the document, measurement, or current source you are using. Keep units, dates, currency, and time periods consistent.
HEALTH REFERENCES WITH CLEAR LIMITS
Calorie Needs Calculator
Estimate basal and daily calorie needs from age, sex, height, weight, and typical activity level.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Mifflin–St Jeor estimates BMR; daily calories = BMR × selected activity factor.
Assumptions
Adult estimate only. It does not account for pregnancy, illness, medication, body composition, or individual clinical needs.
Use case
calorie needs calculator: a clear planning check
Use current measurements and activity information, then discuss individual needs with a qualified clinician or dietitian when health decisions are involved.
Estimate a general daily calorie reference from the information you enter, not a medical prescription.
Build a reliable scenario
How to use and verify your Calorie Needs Calculator result
Calorie Needs Calculator helps you check a specific health & family question with figures that apply to you. Estimate basal and daily calorie needs from age, sex, height, weight, and typical activity level. Use current measurements and activity information, then discuss individual needs with a qualified clinician or dietitian when health decisions are involved. Estimate a general daily calorie reference from the information you enter, not a medical prescription. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
What changes the result?
The stated method is: Mifflin–St Jeor estimates BMR; daily calories = BMR × selected activity factor. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
When checking the answer
Adult estimate only. It does not account for pregnancy, illness, medication, body composition, or individual clinical needs. Not medical or nutrition advice. Consult a qualified clinician or dietitian for individualized guidance.
Quick verification checklist
- • Confirm the date and unit of every input.
- • Replace defaults with values that match your case.
- • Compare the answer with a second scenario.
- • Use the official source for regulated or high-impact decisions.
Source and update
Last reviewed: 2026-08-08
CDC Adult BMI Calculator and guidanceFrequently asked questions
Is Calorie Needs Calculator free to use?
Yes. This calculator runs in your browser and does not require an account.
Is the result guaranteed?
Adult estimate only. It does not account for pregnancy, illness, medication, body composition, or individual clinical needs.
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