BMI Calculator
Calculate your Body Mass Index and check your health status!
Unit
Height
Weight
* BMI is a general screening tool, not medical advice. Consult a healthcare professional for personalized guidance.
What is the BMI Calculator?
The BMI Calculator computes your Body Mass Index — a widely used screening tool that estimates body fat based on your height and weight. BMI provides a quick, accessible way to assess whether your weight falls within a healthy range, though it has important limitations. Developed by Belgian mathematician Adolphe Quetelet in the 1830s, BMI is calculated as weight (kg) divided by height squared (m²). The World Health Organization classifies BMI into categories: underweight (<18.5), normal (18.5-24.9), overweight (25-29.9), and obese (30+). This calculator accepts both metric and imperial measurements and provides your BMI with contextual health information. It also explains BMI's limitations and when other health metrics might be more appropriate.
- ✓ Weight status classification based on WHO guidelines
- ✓ Healthy weight range and target weight automatically calculated
- ✓ Supports both metric (kg/cm) and imperial (lb/ft) units
- ✓ Supports both metric (kg/cm) and imperial (lbs/ft) measurements
- ✓ Contextual health information with WHO classification categories
Frequently Asked Questions
▶What is BMI?
Body Mass Index (BMI) is a measure of body fat based on height and weight. It's calculated by dividing weight in kg by height in meters squared.
▶What is a healthy BMI range?
A BMI between 18.5 and 24.9 is considered normal weight. Below 18.5 is underweight, 25-29.9 is overweight, and 30+ is obese.
▶Is BMI accurate for everyone?
BMI is a useful screening tool but doesn't account for muscle mass, bone density, or body composition. Athletes may have a high BMI despite being healthy.
▶Is BMI accurate for everyone?
No. BMI doesn't distinguish between muscle and fat mass, so muscular athletes may be classified as overweight despite being healthy. It's also less accurate for elderly people, pregnant women, and growing children. Waist circumference and body fat percentage are often better indicators.
▶What is a healthy BMI range?
The WHO defines 18.5-24.9 as the normal BMI range. However, optimal BMI can vary by ethnicity, age, and individual factors. Some Asian health organizations use lower thresholds (23 for overweight) due to different body composition patterns.
▶Should I rely solely on BMI for health assessment?
No. BMI is a useful screening tool but should be considered alongside other metrics like waist-to-hip ratio, body fat percentage, blood pressure, cholesterol levels, and overall fitness. Consult a healthcare professional for comprehensive health assessment.
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