Calculate basal metabolic rate and estimate daily calorie needs for different activity levels.
Enter age, gender, height, weight, and formula preference.
Enter your details to see BMR, maintenance calories, and activity-level estimates.
Activity-level maintenance calories and formula comparison based on your inputs.
This BMR Calculator estimates Basal Metabolic Rate using Mifflin-St Jeor, Revised Harris-Benedict, and Katch-McArdle formulas, then multiplies BMR by common activity factors to estimate maintenance calories.
It is a planning estimate, not medical advice. Metabolism, medication, health conditions, training load, and body composition can all change real calorie needs.
The calculation runs directly in your browser without any external automation dependency.
Calculate basal metabolic rate and daily calorie needs using popular BMR formulas directly in the browser.
This health calculators page is designed for quick checks, planning, and everyday decision support without forcing users through a heavy workflow.
Enter the required values in the calculator above, review any optional settings, and run the calculation. Check the result summary and reset the form when you want to try a different scenario.
For important decisions, compare the output with your own records and professional guidance where needed.
Use the visible input fields in the calculator above. The result is calculated from the entered values using the standard method for this tool.
Example: enter realistic sample values in the required fields, run the calculator, and review the result summary shown on the page.
Use quick health screening calculators for everyday wellness checks and simple body metric estimates.
Last updated: May 10, 2026
Visible answers for users before they rely on a calculator result.
Yes. The BMR Calculator is free to use in your browser.
No. Treat calculator output as an estimate and verify important finance, medical, tax, legal, or compliance decisions with a qualified professional.
Yes. The page is built to work on mobile, tablet, and desktop screens.