BMI Calculator
BMI (Body Mass Index) is the international standard for assessing body weight, calculated as weight(kg) ÷ height²(m²). This tool also provides age calculation from date of birth — precise to years, months, and days. Supports both metric (kg/cm) and imperial (lb/in) units.
Note: BMI is a reference metric only and does not constitute medical diagnosis. Athletes and individuals with high muscle mass may have elevated BMI without being obese. Consult a healthcare professional for health concerns.
BMI Reference
< 18.5
Underweight
18.5 - 24.9
Normal
25 - 29.9
Overweight
≥ 30
Obese
📖 BMI Calculator Guide
Introduction
BMI (Body Mass Index) is an international standard for assessing body weight. This tool also provides age calculation from date of birth.
Features
- BMI calculation: Based on height and weight with category detection
- Age calculation: Precise years/months/days from birthday
- Unit toggle: Metric (kg/cm) and Imperial (lb/in)
- Healthy weight range: Suggested range for your height
BMI Reference
- < 18.5: Underweight
- 18.5 - 24.9: Normal
- 25 - 29.9: Overweight
- ≥ 30: Obese
How to Use
- Select BMI or Age tab
- BMI: Enter height and weight to see results instantly
- Age: Select date of birth for precise age calculation
- Toggle between metric and imperial units
Use Cases
- Health tracking and BMI monitoring
- Fitness goal planning
- Quick health assessment
- Precise age calculation for any purpose