Explains BMI as a screening measure and describes important limitations.
Health & fitness
BMR calculator
Enter your values below for a clear, instant result.
Your result
kcal/day
Estimated maintenance2,556 kcal/day
FormulaMifflin–St Jeor BMR; maintenance = BMR × activity multiplier.
- Enter the known values.
- Apply the displayed formula.
- Review the result and supporting values.
Worked example: An activity multiplier adjusts resting needs to a daily estimate.
Estimate notice: This bmr calculator result is an estimate based only on the values and assumptions shown. Verify important decisions with the relevant official source or a qualified professional.
Educational estimate only—not medical advice. Individual health needs vary; consult a qualified clinician when making health decisions.
Understand the result before using it
BMR calculator uses sex used by equation, weight, height, age, and activity multiplier to calculate its result. It uses a population-based health or fitness equation to produce an educational estimate from your measurements.
Formula, assumptions, and example
Formula
Mifflin–St Jeor BMR; maintenance = BMR × activity multiplier.
Assumptions
- The entered sex used by equation, weight, height, age, and activity multiplier are complete, valid, and use the units or format shown beside each field.
- Measurements are accurate and were taken using the method expected by the equation.
- Population averages are an acceptable starting point for this educational calculation.
Worked example
An activity multiplier adjusts resting needs to a daily estimate.
When to use it
Good uses
- Understand a general screening measure or planning range.
- Track a consistent estimate over time while using the same method.
- Prepare an informed discussion with a qualified healthcare professional.
Limitations
Common mistakes to avoid
- Individual biology, pregnancy, age, medication, disability, training status, and clinical history may make the estimate unsuitable.
- The result cannot diagnose a condition or prescribe treatment, diet, exercise, or medication.
- Educational estimate only—not medical advice. Individual health needs vary; consult a qualified clinician when making health decisions.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Evidence-based context for energy and body-weight planning.
Questions about this calculation
What does the BMR calculator calculate?
BMR calculator uses sex used by equation, weight, height, age, and activity multiplier to calculate its result. It uses a population-based health or fitness equation to produce an educational estimate from your measurements. The formula used is: Mifflin–St Jeor BMR; maintenance = BMR × activity multiplier.
Which inputs affect the BMR calculator result?
The result uses sex used by equation, weight, height, age, and activity multiplier. Changing any of these values can change the output, so enter them using the labels and units shown.
Is the BMR calculator result exact?
This bmr calculator result is an estimate based only on the values and assumptions shown. Verify important decisions with the relevant official source or a qualified professional.
When should I verify a BMR calculator result?
Verify it before any financial, health, academic, construction, safety, or engineering decision. Use the primary source or an appropriately qualified professional.
Clear answers, without the guesswork
1Enter your information
Use the fields above. Results refresh automatically as values change.
2Review the calculation
The formula and context explain how the result was reached.
3Save or share it
Copy your result, print a clean summary, or return from your recent tools.
Your calculation inputs
Calculator values are processed locally in your browser and are not sent to UnitMora's servers. Advertising partners may separately use cookies or similar technologies as explained in the Privacy Policy.
Local calculation. Saving an input stores it in this browser; it does not create a UnitMora account.