Inputs
BMR
Estimate basal metabolic rate from age, sex, height, and weight.
Result
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Result explanation
How to read this result
Visualization
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BMR Calculator
Estimate basal metabolic rate from age, sex, height, and weight.
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Guide
Using the BMR Calculator
What the calculator does
This tool is built to estimate basal metabolic rate from age, sex, height, and weight without making you set the formula up by hand.
It is useful for quick planning and screening, but it should support rather than replace individualized medical advice.
Formula and calculation explanation
Enter Sex, Age, Weight, Weight unit, Height, and Height unit. Those values let the page estimate basal metabolic rate from age, sex, height, and weight.
This page uses the Mifflin-St Jeor equation, which estimates the calories your body uses at rest before exercise or activity is added.
Male BMR
\[BMR = 10w + 6.25h - 5a + 5\]
w is weight in kilograms, h is height in centimeters, and a is age in years.
Female BMR
\[BMR = 10w + 6.25h - 5a - 161\]
The same variables are used, with the standard female adjustment applied.
Real-world examples
- Scenario example: enter sex Male, age 35, weight 182, and weight unit Pounds (lb). That gives you a practical way to turn a real-world health or fitness question into a quick estimate.
- Comparison example: keep the baseline values the same and change weight to see how the bMR responds.
Step-by-step walkthrough
- Enter Sex, Age, Weight, Weight unit, Height, and Height unit.
- Choose the correct mode, category, or unit options before you calculate.
- Click Calculate BMR. The calculator applies the method shown above and updates the answer instantly.
- Review the bMR, then adjust one input at a time to compare scenarios cleanly.
FAQs
What does the bMR result mean?
The main result shown here is bMR. Adjust the inputs above to compare different scenarios and see how the answer changes.
Does this replace medical advice or diagnosis?
No. Health calculators are best used for rough planning and screening. They should support, not replace, individualized advice from a qualified professional.
Why might this calculator differ from another tool?
Different tools may use different reference formulas, rounding rules, or category cutoffs. This page uses the method explained in the formula section above.
Common mistakes
- Choosing a unit or mode that does not match the number entered in the field.
- Changing several inputs at once, which makes it harder to see which variable actually moved the result.
Edge cases
- If a required field is left blank or contains an unsupported value, the calculator will not return a useful result until the input is corrected.
Interpretation of results
The main result shown here is bMR. Adjust the inputs above to compare different scenarios and see how the answer changes.
- When you compare scenarios, change one key input at a time so you can tie each output change back to a specific assumption.
Related concepts and calculators
Related ideas for this page include estimates, reference ranges, body metrics, inputs and assumptions, and screening.