How do I use the BMR Calculator?

Select weight and height units independently. Enter age, weight, and height. Optionally enter body fat % for Katch-McArdle. Click Calculate.

Is the BMR Calculator free?

Yes, the BMR Calculator on ToolHaven is completely free to use. No signup or registration is required.

Calculate calories burned at rest using three leading formulas. Mix kg with ft/in or lbs with cm — any combination works.

Weight

Age

Height

Body Fat % (optional — for Katch-McArdle)

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