NewMums.com
Sleep Schedule & Wake Windows
Baby & Toddler Sleep Calculator
Build a flexible example routine for your little one (10–36 months), compare it with your usual bedtime and explore nap-transition signs.
How This Tool Works
Enter your child's age and usual wake-up time to create an example routine. The sleep totals use published NHS ranges; the wake windows are flexible planning estimates rather than NHS targets.
Remember: There is a wide range of normal sleep. Follow your child's cues and speak to your health visitor or GP if sleep is affecting their health, behaviour or your family's wellbeing.
Your Child's Details
This tool is designed for 10–36 months. It will not calculate a schedule outside that range.
We'll show how your suggested schedule compares to this goal
If you're unsure, we'll suggest the most common schedule for this age.
Your schedule settings are saved in this browser and are not sent to NewMums.com. Clear them after use on a shared browser.
At 15 months old...
Most children are transitioning to one nap
Total Daily Sleep
13-14 hrs
Daytime Nap
2-3 hrs
Night Sleep
11-12 hrs
Wake Windows for Your Child
Wake windows are periods awake between sleeps. The examples below are flexible starting points, not medical recommendations or exact targets.
Your Suggested Schedule
Daily Schedule Times
Your personalised schedule times are listed below in order from morning to bedtime.
Flexibility Tips
- • Schedules can flex by 30 minutes either way
- • Watch your child's sleepy cues, not just the clock
- • Active mornings may mean earlier naps
This is guidance only. Every child is different — always follow your child's cues and speak to your health visitor or GP if you have concerns.
Temporary Sleep Changes
Common reasons routines can change
Temporary Sleep Changes
Common reasons routines can change
Around 18 Months
Sleep may change alongside moving towards one nap, separation anxiety, illness, teething or new skills. There is no fixed “regression” timetable or duration.
Tips: Keep a calm, predictable routine and offer reassurance. Adjust naps gradually rather than making several changes at once.
Around 2 Years
Big emotions, growing independence, fears, potty training, illness or family changes can all temporarily affect settling and night waking.
Tips: Keep bedtime calm and predictable, acknowledge fears, consider a toddler clock to help with early waking.
If sleep difficulties persist, are severe, or affect your child's health or daytime behaviour, speak to your health visitor or GP.
NHS sleep information
Sleep totals and practical advice were checked against current NHS information. External links open in a new window.