Pediatrics · Medication safety

Pediatric dosage calculator by weight.

Start with a confirmed prescription, then use transparent arithmetic to calculate the per-dose and daily amount.

01 · Arithmetic

Dose by weight

Convert mg/kg/dose into milligrams per dose and per day.

02 · Reference

Body surface area

Use Mosteller BSA when the medication protocol calls for it.

03 · Infusion

IV drip rate

Check volume-over-time arithmetic separately.

Safety boundary

These pages do not select a drug, concentration, route, maximum, interval, or adjustment. Verify the prescription, weight, units, concentration, allergies, renal and hepatic function, and local pediatric protocol before administration.