Calculate Caffeine Determine your safe and effective caffeine intake...
Body Surface Area (BSA) is a clinical measurement used to estimate the total external surface of the human body. Unlike body weight or BMI, BSA reflects overall body size in a way that correlates more closely with metabolic rate, blood volume, and organ function.
Our Body Surface Area Calculator helps you determine your BSA using standardized medical equations commonly applied in hospitals and research settings. This metric is widely used for medication dosing, cardiovascular assessment, kidney function evaluation, and metabolic analysis — all essential components of preventive and longevity-focused healthcare.
Although it does not consider individual lifestyle factors, it offers a helpful baseline for reflection and long term thinking.
Calculate your BSA using the scientifically validated Du Bois formula
Enter your height and weight to calculate your body surface area using the Du Bois formula.
BSA is used in medicine for:
Developed in 1916 by Eugene Floyd Du Bois and Delafield Du Bois, this formula remains the most widely used method for calculating BSA:
BSA (m²) = 0.007184 × weight0.425 × height0.725
Where weight is in kilograms and height is in centimeters
Cholesterol HDL Ratio Calculator Calculate your cholesterol to HDL...
The Body Surface Area Calculator estimates total body surface area in square meters (m²) using height and weight. The most commonly applied formula in clinical medicine is the Du Bois equation, developed in 1916, though alternatives such as the Mosteller formula are also widely used due to their simplicity and reliability.
BSA is particularly important in medical dosing. Many chemotherapy agents, cardiac medications, and pediatric treatments are prescribed according to body surface area rather than body weight alone. This approach helps standardize drug exposure across individuals of different sizes and metabolic capacities.
From a longevity and preventive health perspective, body surface area can provide additional context when interpreting physiological markers. Cardiac output, glomerular filtration rate (GFR), and metabolic demands are often indexed to BSA. Understanding this metric supports more personalized health optimization and data-driven decision-making.
Understanding your body fat percentage…
Managing carbohydrates is key for…
Wondering how tall you—or your…
Understanding this calculator can raise questions. Here you’ll find clear, evidence-based answers to help you interpret your results and understand the science behind it.
For most adults, body surface area typically ranges between 1.6 m² and 2.2 m², depending on height, weight, sex, and body composition. Smaller individuals and adolescents generally fall below this range, while taller or larger individuals may exceed it.
BSA correlates more closely with metabolic mass, blood volume, and organ size than body weight alone. This makes it a more precise reference for medications with narrow therapeutic windows, such as chemotherapy drugs.
BSA calculators provide an estimation based on population-derived formulas. While highly reliable for clinical use, they remain approximations. Individual differences in body composition — such as muscle mass or adiposity — are not directly measured.
Yes. Many cardiovascular and renal parameters are indexed to body surface area. When reviewing lab values such as eGFR or cardiac output, adjusting for BSA allows for more accurate interpretation and personalized risk assessment.
The Body Surface Area Calculator is a clinically validated tool used worldwide to estimate total body surface area from height and weight. This measurement plays a critical role in medication dosing, organ function evaluation, and advanced health analysis.
By understanding your body surface area, you gain deeper insight into how your physiology is assessed in medical and research contexts. When combined with other metrics such as BMI, body composition, and metabolic markers, BSA contributes to a more comprehensive and longevity-focused approach to health optimization.
