BMR Calculator
Estimate basal metabolic rate using the Mifflin–St Jeor equation.
Health calculator results are general estimates for adults and are not medical advice, diagnosis or treatment recommendations.
Instructions: BMR Calculator
Follow these steps to get a reliable result without unnecessary setup.
- 1
Choose units and the formula sex parameter used by Mifflin–St Jeor.
- 2
Choose the options in BMR Calculator that match your intended output, such as units, format, mode, range or quality when those controls are available.
- 3
Run BMR Calculator and review the displayed result, preview or validation message before proceeding.
- 4
Individual health circumstances differ; use the estimate as general information and consult a qualified professional for personal medical decisions.
- 5
Use the available reset, copy or download action in BMR Calculator when you are satisfied with the result; only actions supported by this tool are shown.
About this tool: BMR Calculator
Estimate daily basal energy expenditure from age, sex parameter, height and weight using the Mifflin–St Jeor formula.
The result is a general informational estimate for adults and should not be treated as medical advice, diagnosis or treatment guidance.
BMR Calculator is presented in the shared NexterHub tool layout so the working controls stay near the top while the method, example, limitations and related utilities remain available below the result.
How it works
Mifflin–St Jeor uses 10×weight(kg) + 6.25×height(cm) − 5×age plus a sex-specific constant.
Practical example
Changing age, height or weight changes the estimated basal energy requirement.
Important notes
Individual health circumstances differ; use the estimate as general information and consult a qualified professional for personal medical decisions.
Privacy & processing
The estimate is calculated in the browser from the measurements you enter. Avoid including personally identifying details that are not required.
Frequently asked questions
What does BMR Calculator do?
Estimate basal metabolic rate using the Mifflin–St Jeor equation.
How do I use BMR Calculator?
Start with the main input step: Choose units and the formula sex parameter used by Mifflin–St Jeor. Then choose any relevant options, run the tool and review the result.
How does BMR Calculator calculate or process the result?
Mifflin–St Jeor uses 10×weight(kg) + 6.25×height(cm) − 5×age plus a sex-specific constant.
What should I check before using a result from BMR Calculator?
Individual health circumstances differ; use the estimate as general information and consult a qualified professional for personal medical decisions.
Does BMR Calculator send my input to a NexterHub server?
The estimate is calculated in the browser from the measurements you enter. Avoid including personally identifying details that are not required.
Can I use BMR Calculator on a phone or tablet?
Yes. BMR Calculator uses the responsive NexterHub tool layout, so controls and results adapt to smaller touch screens.