Pediatric Weight-Based Dose Calculator
Enter a child's weight and a mg/kg dose to calculate total mg dose and liquid volume from a known concentration.
Weight & Dose Inputs
Enter the prescribed mg/kg dose per single administration.
If set, the result will warn when calculated dose exceeds this ceiling.
mg / mL
E.g. Amoxicillin 250 mg/5 mL = 50 mg/mL. Leave blank for tablet/IV.
Enter weight and dose, then click Calculate.
Result
Weight used
—
kg
Total dose
—
mg
Volume to administer
—
mL
Common Pediatric Reference Doses
Click a row to fill inputs| Drug | Dose (mg/kg) | Max (mg) | Route |
|---|
Reference doses are standard starting points. Doses vary by indication and patient factors. Always confirm with a clinician.
Summary
Enter a child's weight and a mg/kg dose to calculate total mg dose and liquid volume from a known concentration.
How it works
- Enter the child's weight in kg or lb (lb is auto-converted to kg).
- Enter the prescribed dose in mg/kg (or pick from the reference table below).
- Optionally enter the liquid concentration from the bottle label (mg/mL) to get the volume to draw up.
- Click Calculate — the total dose in mg and volume in mL are shown instantly.
- Use the reference table for common starting doses; always confirm with the prescribing clinician.
Use cases
- Convert a prescribed mg/kg dose to total milligrams before preparing a syringe.
- Calculate the mL volume to draw from a suspension with a known concentration.
- Cross-check a weight-based dose for acetaminophen, ibuprofen, or amoxicillin.
- Quickly calculate doses for a custom drug not in a preset medication list.
- Use the reference table to review standard pediatric dose ranges at the bedside.
- Verify dosing calculations in a nursing or pharmacy education setting.
Frequently Asked Questions
Last updated: 2026-07-23 ·
Reviewed by Nham Vu