Pediatric Weight Estimation (APLS) — free guideline decision tool
This tool estimates a child's weight from age using the APLS/Luscombe formulas when weighing is not possible.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does Pediatric Weight Estimation (APLS) do?
Use in emergencies to derive a working weight for drug dosing, equipment sizing, and defibrillation energy.
How is the result calculated?
Months: 0.5 × months + 4. Years 1–5: 2 × years + 8. Years 6–12: 3 × years + 7.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run Pediatric Weight Estimation (APLS) now
This tool estimates a child's weight from age using the APLS/Luscombe formulas when weighing is not possible.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.