BSA-Based Dosage Calculator
Calculate medication dosage based on body surface area
About this calculator
The BSA-Based Dosage Calculator determines medication dosages based on body surface area (BSA), which provides more accurate dosing than weight-based calculations alone. BSA considers both height and weight to calculate the total surface area of the human body, making it particularly valuable for chemotherapy drugs, cardiac medications, and pediatric dosing where precision is critical. This method reduces the risk of under-dosing or overdosing, especially in patients with unusual body compositions or extreme BMI values.
How to use
Enter the patient's height and weight to automatically calculate their body surface area using the Mosteller formula. Input the prescribed dosage per square meter (mg/m²) as specified by the medication guidelines. The calculator will instantly compute the exact dose needed based on the patient's BSA, ensuring accurate and safe medication administration.
Frequently asked questions
Why use BSA instead of weight for dosing?
BSA provides more accurate dosing by accounting for both height and weight, reducing dosing errors especially in obese, underweight, or pediatric patients.
Which medications commonly use BSA-based dosing?
Chemotherapy drugs, cardiac medications, immunosuppressants, and many pediatric medications frequently use BSA-based dosing for improved safety and efficacy.
What formula does this calculator use for BSA?
The calculator uses the Mosteller formula: BSA (m²) = √[(height × weight) / 3600], which is widely accepted in clinical practice.