Body Mass Index (BMI) and Body Surface Area (BSA)
Calculates body mass index and body surface area (Mosteller formula).
Min 0 – Max 800
Min 0 – Max 200
Min 2 – Max 60
Reference
Summary
Usage
Summary
.
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 |
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
- Jennifer Glen , DNP, FNP-BC — EVAL Health, Chief Medical Officer
- Tim Michalski — CEO