BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest, just to keep your organs functioning.

Why use Mifflin-St Jeor?

The Mifflin-St Jeor equation is currently considered the most accurate general-population formula, especially for non-obese adults.

BMR Calculator | Tsinglin.tech

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Units

Weight

Height

Age

Sex

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Estimate your Basal Metabolic Rate using the Mifflin-St Jeor formula. Find the calories your body burns at complete rest, useful for any diet plan.

How to use BMR Calculator

Open the toolNo signup and nothing to install; it works as soon as the page loads.
Set “Units”
Set “Weight”
Set “Height”
Set “Age”
Set “Sex”
Read the resultChange any input and the result is recalculated immediately.

Worked example with the defaults

BMR (KCAL/DAY) · Mifflin-St Jeor formula: 1649

Nothing you enter leaves your device

All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.

That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.

What this tool does not do

BMR Calculator only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.

It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.

Frequently Asked Questions

What is BMR?: BMR (Basal Metabolic Rate) is the number of calories your body burns at complete rest, just to keep your organs functioning.
Why use Mifflin-St Jeor?: The Mifflin-St Jeor equation is currently considered the most accurate general-population formula, especially for non-obese adults.