Formula and calculation method
The estimate uses the Mifflin–St Jeor basal metabolic rate equation and multiplies it by your activity factor.
Worked example and assumptions
Common factors are 1.2 for little exercise, 1.375 for light, 1.55 for moderate, 1.725 for high, and 1.9 for very high activity.
Frequently asked questions
Is the calorie calculator free?
Yes. It is free, requires no account, and runs directly in your browser.
Are the results exact?
The calculation follows the stated formula, but its usefulness depends on accurate inputs and the assumptions described on this page.
Does ClearCalc store my entries?
No. The values are processed in your browser and are not submitted to ClearCalc.
Important: This calculator provides general information, not financial, medical, legal, or tax advice.