Paediatric Oral Suspension Volume Calculator (mL per dose)
Converts a weight-based paediatric mg dose into exact mL of oral suspension based on bottle concentration (mg per 5 mL).
⚠️ Educational Calculation & Clinical Safety Safeguard: Double-check suspension concentration (e.g., Paracetamol 120 mg/5 mL vs 250 mg/5 mL DS vs 100 mg/mL drops) to prevent overdose. Educational calculations do not replace clinician assessment, patient-specific laboratory monitoring, or institutional prescribing protocols.
Interactive Calculator
Allowed physiological/compounding range: 1 to 80 kg
Allowed physiological/compounding range: 0.1 to 200 mg/kg/dose
Allowed physiological/compounding range: 1 to 2000 mg / 5 mL
Calculated Output (mL/dose (and mg/dose))
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Step-by-Step Mathematical Derivation & Explanation:
Validated Formula & Conversion Rules
Dose (mg) = Weight (kg) × mg/kg; Volume (mL) = [Dose (mg) / Strength (mg)] × 5 mLWorked Clinical Example
12 kg child prescribed Paracetamol 15 mg/kg using 120 mg/5 mL suspension: Dose = 180 mg; Volume = (180 / 120) × 5 = 7.5 mL.
Rounding Rules, Assumptions & Source References
- Rounding Rule: Round oral syringe volumes to nearest 0.1 mL (or 0.2 mL above 5 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.