How Much Sleep Does My Child Actually Need?
By Kerry Krause, Certified Pediatric Sleep Consultant | Sleep Belief | Denver, Colorado
One of the first questions I ask parents is: how much is your child sleeping in a 24-hour period? Most haven't added it up. And when they do, the answer is often eye-opening.
Sleep needs change dramatically in the first six years of life. What's normal for a 6-month-old looks nothing like what a 4-year-old needs. And when kids aren't hitting their range, everything suffers, mood, behavior, naps, and night sleep.
Recommended Sleep Ranges by Age
These ranges include all sleep in a 24-hour period, naps and nighttime combined:
Newborns 0 – 3 months: 14–17 hours
Sleep is sporadic and spread throughout the day and night. There's no predictable schedule yet, that's completely normal.
4–11 Months: 12–15 hours
This is when the circadian rhythm starts forming and sleep begins to consolidate. Naps start becoming more predictable and longer stretches of nighttime sleep become possible.
1–2 Years: 11–14 hours
Daytime sleep starts to drop. Most toddlers transition from two naps to one somewhere in this window, usually between 14 and 18 months.
3–5 Years: 10–13 hours
One nap is still appropriate for many kids in this range, typically until age 4 or 5. Dropping the nap too early is one of the most common causes of overtiredness in preschoolers.
6–13 Years: 9–11 hours
Screen time before bed becomes a bigger factor here. The blue light from devices interferes with melatonin production, making it harder for kids to fall asleep at an appropriate time.
Why "Keeping Them Up" Makes Things Worse
Here's the counterintuitive truth most parents don't know: if your child is consistently under-sleeping and struggling, the answer is more sleep, not less.
When a child doesn't get enough sleep, cortisol builds up in their body. That stress hormone signals a wakeful state, which leads to difficulty falling asleep, frequent night wakings, early morning wakeups (hello, 4 a.m.), and short naps. We call this being overtired, and it creates a sleep debt that compounds over time causing many sleep issues.
Keeping an overtired child up later to "tire them out more" dumps more cortisol into the system, a hormone that keeps us awake and alert, which makes everything harder when it comes to falling asleep and staying asleep. More awake time doesn't fix it. Getting sleep timing right does.
The goal is to time when you place your child down for sleep. If you try when they aren’t quite tired enough, they will be unable to fall asleep quickly, which can lead to frustration, which also can spike cortisol. If you place them to sleep too late, they can slip into overtiredness, which spikes cortisol. When you catch the sleep window at the right time, before overtiredness sets in, sleep gets longer and more restorative. The cortisol spike never happens. That's what we're aiming for.
What To Do If Your Child Isn't Hitting Their Range
Start by adding up total sleep across a full 24-hour period for a few days. Compare that to the recommended range for your child's age. If there's a consistent gap, that's a signal worth paying attention to.
Common causes include an age-inappropriate schedule, sleep associations that require your involvement to fall back asleep, an undertired or overtired bedtime, or an environment that isn't supporting deep sleep.
Every child is different and so is every sleep problem. These ranges are a useful starting point, but they're not the whole picture. If you're consistently falling short and struggling, that's exactly what a pediatric sleep consultant is here to help with.
Ready to Figure Out What's Going On?
Sleep Belief offers personalized sleep consulting for children ages 4 months to 6 years in Denver, Colorado and families nationwide. If you're looking at these ranges thinking "we are nowhere close to this", that's exactly what I'm here for.
Book a free 15-minute discovery call at sleepbelief.com and let's figure out what's going on together.