Body Mass Index (BMI) and Body Surface Area (BSA)
Calculates body mass index and body surface area (Mosteller formula).
Jennifer Glen, Tim Michalski
Provided by
EVAL FoundationMin 0 – Max 800
Usage
BMI may be a simple and cost-effective measure of body fat. BMI evaluates the relationship of body mass to height, but it may not be accurate for everyone. BMI does not differentiate between the ratio of body fat to muscle present in body mass nor factor gender, developmental or ethnic considerations. Examples of BMI Limitations:
May be an inappropriate measure for muscular or fit body types. Body fat measurements may be more accurate.
Ethnic variations in height and stature.
.
Summary
BMI offers a more accurate understanding of body composition than weight alone. Additionally, BSA is used in specific therapeutic use cases, such as the treatment of burns.
Rules
Body mass index (kg/m²) = weight(kg) / (height(m))²
Body surface area (m²) = (Height (cm) x Weight (kg) / 3600)^0.5
Uses the Mosteller formula
BMI (kg/m²) | Weight |
<18.5 | Underweight |
18.5-24.9 | Normal Weight |
25.0-29.9 | Overweight |
30.0-34.9 | Obese Class 1 |
35.0-39.9 | Obese Class 2 |
≥40.0 | Obese Class 3 |
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All questions & possible results
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Weight
A number between 0 and 800, in kg or lbs.
Height
A number between 0 and 200, in cm or in.
Target BMI
A number between 2 and 60, in kg/m².
Possible results
Target Weight for BMI Target
Target Weight for BMI Target
Body Mass Index
BMI may be a simple and cost-effective measure of body fat. BMI evaluates the relationship of body mass to height, but it may not be accurate for everyone. BMI does not differentiate between the ratio of body fat to muscle present in body mass nor factor gender, developmental or ethnic considerations. Examples of BMI Limitations:
- May be an inappropriate measure for muscular or fit body types. Body fat measurements may be more accurate.
- Ethnic variations in height and stature.
Literature
- "How much should I weigh?"--Quetelet's equation, upper weight limits, and BMI prime. Conn Med. 2006 Feb;70(2):81-8. — Gadzik J
- Body Mass Index (BMI) — Centers for Disease Control and Prevention
