Child Sleep Calculator
Enter your child's age and morning wake-up time to see the recommended daily sleep for that age (per paediatric sleep guidelines) and the bedtime window that gets them there, accounting for naps. Preschool mornings are far kinder with the right bedtime.
Recommended sleep for 3-5 years (preschool)
10-13 hours per 24h, naps included
At this age: nap optional, often dropped by 5.
Bedtime window for a 7:00 am wake-up
6:00 pm - 9:00 pm
Assuming no daytime nap - add nap minutes above if your child still naps. Guidelines are from the American Academy of Pediatrics; consistency matters more than the exact minute.
Parents also ask
How much sleep does a preschooler need?
Paediatric guidelines recommend 10-13 hours per 24 hours (including naps) for ages 3-5, 11-14 hours for ages 1-2, and 12-16 hours for infants 4-12 months.
When do children stop napping?
Most children drop the daytime nap between ages 3 and 5. If your child still naps at preschool, count that hour towards the daily total and adjust bedtime accordingly.
What bedtime works for a preschool schedule?
For a 7 am wake-up, a 3-5 year old needs lights out between 7 and 9 pm depending on naps. Work backwards from the wake time - this calculator does exactly that.
Do these numbers replace medical advice?
No. They are general guidelines (based on American Academy of Pediatrics / AASM recommendations). If your child consistently struggles with sleep, talk to your paediatrician.