About Us

BMRScope does exactly one job: estimates the calories your body burns at complete rest using the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle formulas so you can compare the three. That is the whole of the site. No account, no newsletter, and no wall between you and the number you came for.

Why this site exists

Plenty of health and body-composition pages already exist. Most of them make you dismiss a banner, ignore a modal and scroll past filler before the tool appears. BMRScope inverts that: the tool is the page, it estimates the calories your body burns at complete rest using the Mifflin-St Jeor, Harris-Benedict and Katch-McArdle formulas so you can compare the three, and everything else is explanation you can read or skip.

How the result is produced

There is no server in the loop at all. Mifflin-St Jeor weights weight, height, age and sex into a single linear equation, while Katch-McArdle works from lean body mass instead — showing all three makes the disagreement between models visible rather than hiding it, and that description is the real algorithm rather than a simplification of it, so you can repeat the sum by hand and compare the two.

Where your data goes

This is a local tool by construction. Your weight, height, age, sex and body-fat percentage never leave your device; there is no endpoint to receive them and no log to read them back from. Disconnecting from the internet after the page loads changes nothing about how it behaves.

Who it is for

Keeping it free

There is no charge to use BMRScope. The costs are covered by advertising, which stays out of the way of the tool itself and has no access to your input. If an advert ever interferes with the page, tell us and we will look at it.

Tell us what you think

Tell us through the contact page if you find a bug or want something added. The basal metabolic rate calculator improves mainly on the strength of what users report.