Paediatric & Adult Dose Calculator
Weight-based medication dose calculator for common drugs. Enter patient details and select a drug category to get accurate dose recommendations.
About This Tool
This calculator uses standard weight-based dosing formulas (mg/kg) as published in the British National Formulary (BNF) and WHO Essential Medicines guidelines. It is intended as a clinical decision support tool only. Always verify doses against your institution's formulary and consider individual patient factors such as renal/hepatic function before prescribing.
Patient Details
Patient Type
Paediatric (under 18 years)
Adult (18 years and above)
Drug Class / Category
— Select Drug Class —
Non-Opioid Analgesics (Aniline / Salicylate)
NSAIDs (Propionic / Acetic / Oxicam acids)
Weak Opioids (Codeine / Tramadol class)
Strong Opioids (Morphine / Fentanyl class)
Penicillins (β-lactam, aminopenicillin)
Penicillin + β-lactamase Inhibitor
1st Gen Cephalosporins
3rd Gen Cephalosporins
Macrolides (Azalide / 14-membered ring)
Fluoroquinolones (4th Gen)
Aminoglycosides
Nitroimidazoles
Sulfonamides / Antifolates
Tetracyclines
Glycopeptides (Cell-wall synthesis)
Carbapenems
Oxazolidinones
Lincosamides
Azole Antifungals (Triazoles)
Polyene Antifungals
Echinocandins
Nucleoside Analogues (DNA Polymerase inhibitors)
Neuraminidase Inhibitors (Influenza)
4-Aminoquinolines (Chloroquine class)
Artemisinin Derivatives
Antiprotozoals (Nitro class)
1st Gen Antihistamines (Sedating)
2nd Gen Antihistamines (Non-sedating)
Glucocorticoids — Oral (Prednisolone class)
High-potency Glucocorticoids (Dexamethasone class)
Mineralocorticoids
Short-acting β₂ Agonists (SABA)
Long-acting β₂ Agonists (LABA)
Anticholinergics — Respiratory (SAMA)
Methylxanthines (Phosphodiesterase inhibitors)
Leukotriene Receptor Antagonists
Inhaled Corticosteroids (ICS)
Benzodiazepines (GABA-A agonist)
Barbiturates
Sodium Channel Blockers (Phenytoin class)
Valproate Class (GABA Enhancer)
Newer AEDs (Levetiracetam / Lamotrigine class)
Beta Blockers (β-adrenergic antagonists)
ACE Inhibitors
ARBs (Angiotensin-II receptor blockers)
CCBs — Dihydropyridine (Amlodipine class)
Loop Diuretics
Thiazide Diuretics
Cardiac Glycosides
Antiplatelets (COX inhibitor class)
Biguanides (Metformin class)
Sulfonylureas
Insulin — Rapid-acting
Thyroid Hormone Replacement
Proton Pump Inhibitors (PPIs)
H₂ Receptor Antagonists
D₂ Antagonist Antiemetics (Metoclopramide class)
5-HT₃ Antagonist Antiemetics (Ondansetron class)
Osmotic Laxatives
Oral Rehydration Solution
IV Crystalloids
Iron Supplements
Vitamin D (Calciferols)
Zinc Supplements
Folic Acid
Specific Drug
— Select Class First —
Indication / Route (optional)
Standard / Oral
Severe / IV / IM
Prophylaxis
Calculate Dose
Clear / Reset
Dose Recommendation
Enter patient details, select drug class and drug to see dose calculation.
Quick Reference — Common Paediatric Doses
← Scroll horizontally to see full table →
