Quick Work StudioCalculators
Estimate resting daily calorie burn.
The BMR Calculator is a free online tool in Quick Work Studio's calculators collection. Estimate resting daily calorie burn. This uses the Mifflin–St Jeor equation, a widely-used estimate of the calories your body burns at complete rest. It's an approximation — actual metabolism varies by individual.
This kind of calculation is common enough that most people do it in their head or on a napkin at some point — which is exactly where small arithmetic mistakes creep in. Using a dedicated calculator removes that risk and gives you the number instantly.
Like every tool on Quick Work Studio, the BMR Calculator is 100% free, requires no sign-up, and works instantly in any modern browser on desktop or mobile — it's one of 100+ tools built to save you a small chunk of time without getting in your way.
No. BMR Calculator runs entirely in your browser using JavaScript — whatever you type or upload is processed on your own device and is never sent to a server.
Basal Metabolic Rate — the number of calories your body burns at complete rest just to maintain basic functions like breathing and circulation.
No — every tool on Quick Work Studio works immediately with no account required.
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