Weight-Based Dose Calculator (mg/kg & mg/kg/day)
Calculates single dose (mg) and total daily dose (mg/day) from patient body weight (kg) and prescribed mg/kg regimen.
⚠️ Educational Calculation & Clinical Safety Safeguard: Always verify that the calculated weight-based dose does not exceed the maximum adult single or daily ceiling dose. Educational calculations do not replace clinician assessment, patient-specific laboratory monitoring, or institutional prescribing protocols.
Interactive Calculator
Allowed physiological/compounding range: 0.5 to 300 kg
Allowed physiological/compounding range: 0.001 to 2000 mg/kg/dose
Allowed physiological/compounding range: 1 to 24 doses/day
Calculated Output (mg/dose & mg/day)
---
---
Step-by-Step Mathematical Derivation & Explanation:
Validated Formula & Conversion Rules
Single Dose (mg) = Weight (kg) × Dose (mg/kg/dose); Total Daily Dose (mg/day) = Single Dose (mg) × Doses/dayWorked Clinical Example
A 60 kg adult prescribed Paracetamol 15 mg/kg/dose every 8 hours (3 doses/day): Single Dose = 60 × 15 = 900 mg; Total Daily Dose = 900 × 3 = 2700 mg/day (within 4000 mg/day adult ceiling).
Rounding Rules, Assumptions & Source References
- Rounding Rule: Round oral tablet doses to nearest practical scored tablet strength; round liquid doses to 0.1 mL.
- Clinical Assumptions & Limitations: Validated only within the stated physiological input boundaries. For paediatric, renal (Cockcroft-Gault), and critical-care infusion calculations, always cross-check against official product labelling and institutional guidelines.
- Source References: Indian Pharmacopoeia (IP 2022), National Formulary of India (NFI), British National Formulary (BNF), and NCBI Bookshelf Clinical Pharmacology Compendia.