BMR Calculator – Mifflin–St Jeor Basal Metabolic Rate (Free)
Estimate basal metabolic rate (calories at rest) from weight, height, age, and sex using the Mifflin–St Jeor equation—common in apps and coaching tools.
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Quick answer
A BMR calculator estimates basal metabolic rate—calories your body may burn at rest—often using height, weight, age, and sex in a published equation.
CalcSuite Pro uses a common predictive formula (for example Mifflin–St Jeor style inputs) to return a single number you can compare across scenarios.
Actual metabolism varies with genetics, muscle mass, illness, and medication; treat output as an estimate, not a meal plan or medical prescription.
Years
Centimeters
Kilograms
Result
Enter values and click calculate.
Formula
BMR (Mifflin–St Jeor): men = 10w + 6.25h − 5a + 5; women = 10w + 6.25h − 5a − 161 (w=kg, h=cm, a=age).
Explanation
BMR Calculator computes results using the formula BMR (Mifflin–St Jeor): men = 10w + 6.25h − 5a + 5; women = 10w + 6.25h − 5a − 161 (w=kg, h=cm, a=age). from your input values: sex, age, height, and weight. Entering each field returns a numerical answer based on that exact equation, so the page is a faster, less error-prone alternative to running the math by hand.
It is built for personal wellness tracking and routine planning, estimating body metrics before fitness decisions, and building healthier goals with measurable numbers. People typically open this calculator when they need a quick, repeatable answer they can check in seconds—students confirming a homework number, professionals validating a real-world figure, or anyone running a what-if scenario before making a decision.
Read the result alongside the formula on this page so each input's effect is transparent, then re-run with adjusted values to see how the answer changes. If anything looks off, double-check unit consistency in your inputs—mixing percent values with decimals or months with years is the most common source of an unexpected result.
How to Use
- Enter or choose Sex (Female / Male), Age, Height, and Weight as indicated.
- Use the units shown under each field (for example kg, m, cm, years).
- Click Calculate to run the BMR (Mifflin–St Jeor): men = 10w + 6.25h − 5a + 5; women = 10w + 6.25h − 5a − 161 (w=kg, h=cm, a=age). formula.
- Read the result and compare with alternate values if you want scenario-based planning.
Example
Sample inputs: Sex = woman, Age = 32, Height = 165, Weight = 62
Calculated result: 1330.0000
You can replace these values with your own numbers to calculate a real-world result instantly.
FAQ
What is a bmr calculator?
BMR Calculator helps you apply the formula "BMR (Mifflin–St Jeor): men = 10w + 6.25h − 5a + 5; women = 10w + 6.25h − 5a − 161 (w=kg, h=cm, a=age)." quickly using your own values.
When should I use this bmr calculator?
Use it when you need quick and repeatable health calculations without manual errors.
How accurate are the results?
Results are formula-based and depend on entering correct values with the right units.
Why am I seeing an invalid input message?
One or more required values are missing, non-numeric, or caused a divide-by-zero condition.
Is this calculator free to use?
Yes. You can use this calculator online for free.
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