What can I do with BMR Calculator?

Estimate basal metabolic rate with Mifflin-St Jeor. BMR Calculator is part of the Health shelf on utils.sbs and is designed for quick, one-off tasks.

Is BMR Calculator free to use?

Yes. BMR Calculator is free, requires no account, and has no per-file or per-use charge.

Are my files uploaded when I use BMR Calculator?

No. BMR Calculator is designed to process your input locally in the browser. Files are not uploaded to a server for processing.

What formats does BMR Calculator support?

It accepts numeric inputs and returns a clearly formatted calculation with an explanation where relevant.

Can I use BMR Calculator on my phone?

Yes. BMR Calculator is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Health tool

BMR Calculator

Estimate basal metabolic rate with Mifflin-St Jeor.

Runs on-deviceNo sign-upFree

All health tools

Workspace

BMR Calculator

Runs locally

Sex

Weight

Height

Age

years

Results update as you change the inputs. Formulas are standard reference calculations; finance and health tools are estimates, not advice.

Result

Waiting for values…

Full breakdown

The guide

By the utils.sbs team · Reviewed November 2026 · How we build and review tools

Quick answer

BMR Calculator is a free browser-based health tool. Estimate basal metabolic rate with Mifflin-St Jeor. It runs with JavaScript arithmetic locally, requires no account and does not upload your files. Open the page, add your input, adjust any options and download the result.

What is BMR Calculator?

BMR Calculator is a free browser-based health tool from utils.sbs. Estimate basal metabolic rate with Mifflin-St Jeor. It is built for quick, focused jobs: open the page, add your input, adjust the options and take the result with you. No account, install or server upload is required.

At a glance

Category	Health
Input	Numbers and the options shown on this page
Output	A formatted result with intermediate values where relevant
Engine	JavaScript arithmetic
Processing	In your browser
Price	Free
Account	Not required

How BMR Calculator works

The calculator applies standard formulas with JavaScript number precision and shows the result immediately. Values are not sent anywhere.

How to use BMR Calculator

1Open BMR Calculator and add your input.
2Adjust the options: sex, weight, height, age.
3Run the tool, check the preview or result, and download the output.

When to use BMR Calculator

Check a calculation before making a decision.
Work through a homework or reference problem with visible steps.
Sanity-check a financial, health or geometry estimate.

Inputs and options

Sex: Choose one of 2 options.
Weight: Enter a numeric value in kg.
Height: Enter a numeric value in cm.
Age: Enter a numeric value in years.

Limitations

Results are reference calculations. Verify financial, medical, legal or safety-critical decisions independently.

Privacy and accuracy

BMR Calculator processes its input in the browser whenever the platform API allows it. Files and values are not uploaded to a server for processing, and the tool does not require an account. For calculations, use the result as a reference and verify important decisions against the source formula or a qualified professional. Read our methodology.

FAQ

BMR Calculator questions

What can I do with BMR Calculator?
Estimate basal metabolic rate with Mifflin-St Jeor. BMR Calculator is part of the Health shelf on utils.sbs and is designed for quick, one-off tasks.
Is BMR Calculator free to use?
Yes. BMR Calculator is free, requires no account, and has no per-file or per-use charge.
Are my files uploaded when I use BMR Calculator?
No. BMR Calculator is designed to process your input locally in the browser. Files are not uploaded to a server for processing.
What formats does BMR Calculator support?
It accepts numeric inputs and returns a clearly formatted calculation with an explanation where relevant.
Can I use BMR Calculator on my phone?
Yes. BMR Calculator is responsive and works in modern mobile browsers. Very large files may be limited by the device's available memory.

Keep going

Related health tools