1. What is mg/kg to mg/m² Conversion?

The mg/kg to mg/m² conversion is used to adjust medication doses based on body surface area (BSA) rather than just body weight. This is particularly important for blood-related medications and chemotherapy drugs where BSA provides a more accurate dosing parameter.

2. How Does the Calculator Work?

The calculator uses the following equation:

Where:

• \( mg/kg \) — Dose in milligrams per kilogram of body weight
• \( Weight\_kg \) — Patient's weight in kilograms
• \( BSA\_m² \) — Patient's body surface area in square meters

Explanation: The equation converts weight-based dosing to body surface area-based dosing, which is often more accurate for many medications.

3. Importance of BSA-based Dosing

Details: BSA-based dosing is particularly important for chemotherapy drugs, blood-related medications, and other drugs where metabolic rate (which correlates better with BSA than weight) is a key factor in drug clearance.

4. Using the Calculator

Tips: Enter the dose in mg/kg, patient's weight in kg, and BSA in m². All values must be positive numbers. BSA can be calculated using various formulas (Mosteller, DuBois, etc.) or measured directly.

5. Frequently Asked Questions (FAQ)

Q1: Why use BSA instead of weight for dosing?
A: BSA correlates better with metabolic rate and organ size than weight alone, making it more accurate for many medications.

Q2: How is BSA calculated?
A: Common formulas include Mosteller (√[height(cm)×weight(kg)/3600]) and DuBois (0.007184×height(cm)^0.725×weight(kg)^0.425).

Q3: When is mg/m² dosing preferred?
A: For chemotherapy, blood products, and medications where toxicity is closely related to metabolic rate.

Q4: Are there limitations to BSA dosing?
A: May be less accurate in obese patients or those with abnormal body composition. Clinical judgment is always needed.

Q5: Should this be used for all medications?
A: No, only for medications specifically dosed by BSA. Many drugs are appropriately dosed by weight alone.