Estimate basal metabolic rate from age, gender, height, and weight.
Health
BMR Calculator
BMR Calculator is a free online tool that helps you calculate a focused result directly in your browser.
The calculator appears before this guide so visitors can use the tool immediately, while the text below helps explain the purpose, method, and common use cases.
Enter the requested values, review the labels, and press the calculate button. The result updates on the page so you can change inputs and compare scenarios quickly.
Use the default values first if you want to see how the calculator works, then replace them with your own numbers.
The Mifflin-St Jeor equation estimates BMR as 10 x weight in kg + 6.25 x height in cm - 5 x age + 5 for men, or minus 161 for women.
Make sure the units match the labels shown in the form before relying on the result.
For example, a 30-year-old male who weighs 75 kg and is 180 cm tall has an estimated BMR of about 1,730 calories per day.
Examples help you understand the scale of the result before using your own data.
Yes. It runs in your browser and is free for quick reference.
The result is an estimate or educational calculation. Confirm important health, finance, legal, or engineering decisions with a qualified professional.
Each input is part of the formula, so changing one value updates the calculation immediately.