health ToolUpdated 2026-09-20
BMI Calculator for Women & Age Chart
Calculate your Body Mass Index (BMI) with context designed for women. Evaluate your score against World Health Organization standards and explore healthy weight ranges for your height.
Formula & Mathematical Methodology
BMI = Weight (kg) ÷ (Height in meters)²
Standard clinical BMI provides a baseline ratio of total body mass to height. For women, body fat percentage typically averages 5% to 10% higher than men at identical BMI levels due to essential reproductive adipose tissue.
Step-by-Step Worked Example
Scenario: Woman, 62 kg, 165 cm tall, age 29.
1. Convert height to meters: 165 cm ÷ 100 = 1.65 m.
2. Square height: 1.65 × 1.65 = 2.7225 m².
3. Divide weight by squared height: 62 ÷ 2.7225 = 22.77.
4. WHO Category: Normal / Healthy Weight (18.5 – 24.9).
5. Healthy weight range for 165 cm: 50.4 kg to 67.8 kg.
Final Calculated Result: 22.8 BMI (Normal Weight)
Frequently Asked Questions
Why do women need higher essential body fat than men?
Essential biological fat for adult women is roughly 10–13% (compared to 2–5% for men) to support hormonal balance, menstruation, and reproductive health.
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