Dose in millilitres
Dose in milligrams
For ages 1 month to 18 years only.

This calculator uses 12.5mg/kg/dose

General Dosing:
1 month - 18 years 12.5–25 mg/kg (usual maximum 500 mg; up to 1 g may be used), TWICE daily for impetigo and FOUR times daily for infections due to sensitive Gram-positive and Gram-negative bacteria
Note High doses (25 mg/kg) are used in secondary care situations (e.g. step-down dosing from intravenous to oral therapy for bone and joint infections).
Calculator written by Dr Jeremy Steinberg, GP. Contact for suggestions