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Life and Map Tools

BMR Calculator

Estimate basal metabolic rate as a quick non-medical health reference.

Before You Use
  • Health calculators and self-check tools are general references, not medical advice. Use official medical guidance for symptoms, diagnosis, or treatment decisions.
ToolRuns in the browser
BMR Calculator working example

Estimate basal metabolic rate as a quick non-medical health reference.

Runs in your browser
Sample result
Example BMR Calculator result
BMR reference result
- Mifflin-St Jeor estimate in kcal/day
- Optional activity-based daily estimate
- Health-reference limitation
Next step: compare an activity estimate or review the linked health guidance
The interactive tool loads in this area when JavaScript is enabled.

How to use BMR Calculator

The Mifflin-St Jeor estimate uses BMR = 10 × weight (kg) + 6.25 × height (cm) - 5 × age + 5 for men; the final constant is -161 for women. The result is shown in kcal/day.

  • Select sex, then enter age, height in cm, and weight in kg.
  • Run the calculation and read the BMR estimate in kcal/day.
  • Apply an activity option only when you also want a broader daily-energy estimate.
  • Treat the number as a population-based reference, not a personal nutrition or treatment prescription.

Useful for

  • Estimate BMR
  • Compare health reference values
  • Plan wellness notes

Common issues

The BMR estimate is unexpectedly high or low.

Check sex, age, height in cm, and weight in kg before recalculating.

The estimate is being treated as a personal calorie prescription.

Use it only as a population-based reference and consult a qualified professional for individual guidance.

How to interpret the result

Read BMR in kcal/day as an estimate based on the entered variables, not as a diagnosis or minimum intake prescription.

Related workflow

Next path: BMR Calculator -> Business Days Calculator -> Child Growth Reference Calculator. Keep the original input nearby so you can compare each result before using it elsewhere.

Privacy and review notes

The BMR estimate runs in your browser. It is a general health reference and does not replace medical or dietetic guidance.

Basis and limitations

Basis

  • The tool applies only the entered body measurements, lifestyle records, dates, or checklist answers to its stated rules.
  • It runs the formula or self-check rules described on the page in the browser and returns a general reference result.

Limitations

  • The output is not a medical diagnosis, treatment plan, prescription, emergency assessment, or personalized health advice.
  • Symptoms, pregnancy, alcohol, sleep, weight, and mental-health decisions require official guidance or a qualified professional.

Official check

  • Before making health-related decisions, check a medical professional, public-health authority, or official medical source.

References and methodology

  • Official external source: WHO health topics — An international public-health reference for interpreting health topics and limitations.

Review scope: We automatically check that the calculation basis and official source links are shown. No licensed medical, legal, or tax professional has reviewed this result individually, so confirm with the responsible agency or a professional before an important decision.