MyWorkingArea

tool utilidades

health calculator

Calculate BMI, metabolism, calories, water and body fat.

Reviewed practical guide

How to use Use the health calculator and verify the result

Estimates values such as BMI, metabolism, calories, water or body fat from the entered data.

Choose the correct calculation, use consistent units and avoid overstating activity.

Practical example: Estimate a starting energy-expenditure range to prepare questions for a professional appointment. Post-process verification is part of the workflow: a successful download alone does not prove that the content is correct.

What result to expect

A numerical estimate with units and references relevant to the selected calculation.

When this is useful

  • Estimate a starting energy-expenditure range to prepare questions for a professional appointment.
  • Check a test case before incorporating it into a workflow.
  • Repeat the process with different settings and compare both results.

Checks before sharing

  • Repeat with verified measurements and confirm age, units and selected formula.
  • Check that the input contains no sensitive information and that the selected units or format are correct.
  • Keep the input alongside the result whenever the calculation needs to be reproducible or auditable.

Limitations to understand

  • These are population estimates, not diagnoses or personalised medical plans; pregnancy, illness and body composition may change their usefulness.
  • The result depends entirely on the quality and context of the entered data; interpret it only for its stated purpose.
  • The tool automates one specific operation; review the result whenever it will support a decision, publication or delivery.

Method and sources for the health estimates

BMI divides weight in kilograms by squared height in metres, and the displayed adult reference interval is 18.5–24.9. Basal energy uses Mifflin–St Jeor, while maintenance multiplies it by the selected activity factor. Water (35 ml/kg) is a rough rule, not clinical guidance. Body fat is a circumference estimate inspired by the US Navy method. Pregnancy, childhood, illness, muscularity and medication require professional assessment.

Frequently asked questions

What should I prepare before starting?

Check that the input contains no sensitive information and that the selected units or format are correct.

How do I know whether the result is correct?

Repeat with verified measurements and confirm age, units and selected formula.

What does this tool not solve?

These are population estimates, not diagnoses or personalised medical plans; pregnancy, illness and body composition may change their usefulness.

Editorial review: MyWorkingArea team

Checked against the options and output of the current tool.

Content reviewed on 11 August 2026.

See how we review our guidesReport an error or correction

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