Melatonin Dosing Calculator for Children | Evidence-Based Guidelines

Melatonin can be a helpful tool for children with sleep onset insomnia—but getting the dose right matters. Too little won't work; too much can cause side effects like nightmares, night wakings, or morning grogginess.

This calculator provides evidence-based dosing recommendations from the 2025 International Pediatric Sleep Association (IPSA) consensus guidelines, as well as some other sources. Simply enter your child's age to see the appropriate starting dose and maximum.

Before you use this calculator:

• Melatonin works best when combined with good sleep habits—not as a replacement for them. If your child is struggling with sleep, start with behavioral approaches like sleep training first. Melatonin should supplement these strategies, not replace them. Most children should not need to use melatonin.
• Moreover, melatonin (like prescription sleep medications) is not anesthesia. It will gently nudge your child towards sleep, not guarantee perfect sleep. It works best when partnered with a behavioral sleep plan. Before starting melatonin, assess your child's current sleep issues with your pediatrician.
• Have a clear plan for starting and stopping it.
• Melatonin is the most commonly overdosed substance among children. Please keep it in a safe place
• Discuss melatonin (and any medication) with your child's pediatrician before starting it.

For a deeper dive into how melatonin works, when it's appropriate, and what the research says, read my complete guide: Should My Child Take Melatonin?

Originally published January 2026. Last reviewed/updated by Dr. Craig Canapari, MD in January 2026