A free tool built for parents - helping families find the right bedtime for every age using guidelines from the world's leading health organizations.
"Bedtime battles are one of the most common sources of family stress. We built this calculator to take the guesswork out of it - giving parents a clear, age-specific answer they can actually use tonight."
ChildSleepCalculator.com exists to give parents a fast, reliable, and trustworthy answer to one of the most important questions in child development: how much sleep does my child actually need - and what time should they go to bed?
Sleep is foundational to children's physical growth, brain development, immune function, and emotional wellbeing. Yet millions of children are chronically sleep-deprived, often because bedtimes are set by habit rather than by the science of what their developing bodies actually need.
This calculator changes that. Enter your child's age and wake-up time, and you'll get a personalized bedtime recommendation - drawn directly from the same guidelines your pediatrician would use.
All sleep recommendations on this site are drawn directly from guidance published by two of the world's most respected health authorities:
The AAP publishes evidence-based sleep duration recommendations for children at every age, developed by specialist pediatric committees and updated as new research emerges. healthychildren.org
The NHS provides sleep guidance for children and teenagers across all age groups, consistent with international pediatric consensus. nhs.uk
We present these guidelines as published. The calculator personalises them based on your child's age and wake-up time - nothing is invented or estimated beyond what the guidelines define.
Your privacy - and your child's - matters to us:
Is this calculator free?
Yes - completely free to use, with no registration, no paywall, and no premium tier.
Who built this?
This site was built independently to make evidence-based sleep guidance more accessible to parents. We are not affiliated with or funded by the AAP or NHS.
How often are the guidelines updated?
We monitor both AAP and NHS publications and update the calculator if official sleep recommendations change. The current data reflects the most recently published guidance from both organizations.
Should I follow the calculator exactly?
The calculator gives you a science-based starting point. Every child is different - use the result as a target to aim for, and adjust by 15-minute increments if needed. If you have concerns about your child's sleep, speak to a doctor or pediatrician.
Disclaimer: ChildSleepCalculator.com provides informational content based on publicly available guidelines from the AAP and NHS. This website is not a medical service and does not provide medical advice. Calculator results are a general guide based on population-level recommendations. Always consult a qualified healthcare professional for advice specific to your child's health and development.