Weight-Based Calculation Logic
Step-by-step mathematical breakdown for . Understanding the math reduces dosing anxiety. ✏️ Click medicine name to change
Interactive Variables
Modify these values to see the logic update
Clinical Standards Applied
This engine utilizes the Nelson's Pediatric Antimicrobial Therapy standards for weight-based antibiotic logic.
The Core Formula
Breakdown Analysis
Unit Sanitization
Medical dosing is almost exclusively weight-metric (kg). Since user intent often
starts with pounds (lb), our engine applies the constant 0.453592
for conversion.
Target Milligrams
The mg/kg/day varies by indication (ear infection vs. throat). We multiply the
patient's precise weight by the clinician's chosen basis.
Volume Conversion
The most common point of failure is concentration. Amoxicillin comes in 250mg/5mL and 400mg/5mL. We divide the total daily mg by the concentration strength.
Rounding Rules
Calculators often give 5+ decimal points. Our engine rounds to the nearest 0.1 mL because standard oral syringes are marked in 0.1 increments.
Common Logic Questions
Why use 400mg/5mL instead of 250mg/5mL?
The 400mg concentration allows for a smaller volume of liquid per dose. This is often preferred for infants or children who struggle with larger volumes of medicine.
Does the formula change for dogs?
The mathematical logic (Weight × Dose / Concentration) remains identical. However, the mg/kg basis used for dogs is typically different than for humans. Always use our Veterinary Template for pet-specific math.
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