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BMI (Body Mass Index) Calculator

Calculate body mass index, weight category & ideal healthy weight range.

Input Parameters

Calculation Results

Your BMI Score
22.9kg/m²
BMI Weight Category
Normal / Healthy weight (18.5 – 24.9)
Ideal Healthy Weight Range
56.7 kg – 76.3 kg (124.9 – 168.1 lbs)
Summary: Your BMI is 22.9, putting you in the Normal / Healthy weight (18.5 – 24.9) category based on WHO guidelines.
Step-by-Step Calculation Solution
1.Metric Formula: BMI = Weight (kg) / [Height (m)]²
2.Calculation: 70 kg / (1.75m)² = 22.9 kg/m²
3.WHO Standard Range: Underweight < 18.5 | Normal 18.5-24.9 | Overweight 25-29.9 | Obese ≥ 30

Formula & How BMI (Body Mass Index) Calculator Works

Mathematical Formula
BMI = Weight (kg) / [Height (m)]²

BMI evaluates adult weight relative to height according to World Health Organization categories.

How to Calculate BMI (Body Mass Index) Calculator (Step-by-Step)
  1. Enter Measurement System: Input your target parameter value.
  2. Enter Height (cm): Input your target parameter value.
  3. Enter Weight (kg): Input your target parameter value.
  4. Enter Height (Inches - Imperial): Input your target parameter value.
  5. Enter Weight (Pounds - Imperial): Input your target parameter value.
  6. Apply Formula: Calculate using BMI = Weight (kg) / [Height (m)]².
  7. Review Results: View exact computed answers, metrics, and worked mathematical proofs.
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Frequently Asked Questions (FAQs)

What is a healthy BMI range?

A BMI between 18.5 and 24.9 is considered normal/healthy for adults.

Official Regulatory & Government Data Sources

Authoritative Standards & Verified Reference Citations

Independent & Verified

Calculations and mathematical logic on this page are grounded in published statutory rules, regulatory standards, and official government data published by the following bodies:

Department of Health and Aged CareGovernment
Australian Government Health Agency

Australia's Physical Activity and Sedentary Behaviour Guidelines and dietary energy expenditure metrics.

www.health.gov.au
National Health and Medical Research Council (NHMRC)Government
Australian Government Medical Research Body

Nutrient Reference Values (NRVs) for Australia and New Zealand, macronutrient distribution, and hydration standards.

www.nhmrc.gov.au

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