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BMI Calculator

Calculate your Body Mass Index using the WHO standard. Supports metric (kg/cm) and imperial (lb/ft+in).

Metric & ImperialWHO Standard

About this tool

Calculate your Body Mass Index using the WHO standard. Supports metric (kg/cm) and imperial (lb/ft+in). MyCalcTools calculators are designed for quick everyday estimates with clear inputs, instant results and no account required. Results are provided for general information and planning, not as professional financial, medical, legal or trade advice.

How to use it

  1. Enter the values requested in the calculator fields.
  2. Choose the option that best matches your situation, unit or goal.
  3. Press the calculate button and review the result summary.
  4. Adjust your inputs to compare different scenarios.

Common use cases

  • Checking a quick estimate before making a decision.
  • Comparing two or more everyday scenarios side by side.
  • Planning budgets, meals, projects, dates or personal routines.
  • Double-checking manual calculations with a simple online reference.

Frequently Asked Questions

WHO classifies BMI 18.5–24.9 as healthy weight. Under 18.5 is underweight, 25–29.9 is overweight, 30+ is obese.

BMI is a useful screening tool but does not account for muscle mass, age, or ethnicity. Consult a doctor for a full health assessment.

You can switch between metric (kg, cm) and imperial (lbs, ft/in) using the toggle above.