A 1-year-old needs 11 to 14 hours of total sleep in a 24-hour period, including naps. Most 12-month-olds get about 10 to 12 hours overnight and take two daytime naps of 1 to 2 hours each. Where your child falls within that range depends on their individual needs, but consistently landing below 11 hours is worth paying attention to.
How Those Hours Break Down
At 12 months, sleep is split between a long stretch at night and two shorter naps during the day. Nighttime sleep typically makes up the bulk, around 10 to 12 hours, while the two naps fill in the remaining 2 to 3 hours. Some toddlers sleep a solid 11-hour night and take two generous naps. Others sleep closer to 10 hours overnight and rely more heavily on daytime sleep to hit their total. Both patterns are normal as long as the overall number stays in that 11-to-14-hour window.
The timing of those naps matters more than you might expect. Most 1-year-olds do well with a morning nap (usually mid-morning) and an afternoon nap, spaced so neither one starts too close to bedtime. If your toddler’s second nap ends after 4 p.m., you may notice bedtime becomes a battle because they simply aren’t tired enough.
Why Sleep Matters So Much at This Age
Sleep at 12 months isn’t just rest. It’s when your child’s brain consolidates memories from the day, essentially sorting and storing everything they’ve learned. It also regulates mood, which is why an under-slept toddler is noticeably crankier and more prone to meltdowns. On the physical side, sleep triggers the release of hormones that drive brain and body growth, and it strengthens the immune system, helping fight off the constant stream of infections that come with toddlerhood.
In short, a toddler who consistently sleeps well gets sick less often, learns faster, and handles frustration better than one running on too little sleep.
The 12-Month Sleep Regression
If your 1-year-old was sleeping well and suddenly isn’t, you’re likely dealing with the 12-month sleep regression. This is one of the most common disruptions parents face at this age, and it typically resolves within a few weeks.
Several things collide around the first birthday to throw sleep off track. Your toddler is becoming more physically active, possibly pulling to stand or starting to walk, and that restlessness carries into the crib. Separation anxiety peaks around this age too, making it harder for them to settle when you leave the room. Teething pain can wake them at night. And the sheer excitement of new skills sometimes means their brain won’t quiet down at bedtime.
The best approach during a regression is to stay consistent with your existing sleep routines rather than introducing new habits (like bringing them into your bed or adding a feeding) that you’ll need to undo later. Regressions feel endless in the moment, but they pass.
How Walking and Other Milestones Disrupt Sleep
Learning to walk is one of the biggest physical milestones of the first year, and it often shows up as sleep disruption. Toddlers who are working on walking may wake more frequently at night, take longer to fall asleep, or suddenly resist naps. Part of this is neurological: their brain is processing a massive new skill. Part of it is physical: all that extra movement burns more calories, so they may wake up genuinely hungry.
If your toddler is in the thick of a new milestone and sleep falls apart, it usually stabilizes once the skill is more firmly established. You might notice they need a slightly earlier bedtime or a small extra snack before bed during these periods.
When to Drop to One Nap
Most toddlers transition from two naps to one somewhere between 12 and 18 months. At 12 months, the majority still need two naps, so don’t rush this transition. Dropping a nap too early often backfires with overtiredness and worse nighttime sleep.
Your toddler is likely ready to move to one nap if you’ve seen at least two weeks of consistent signs like these:
- They refuse one or both naps regularly, chatting or playing instead of sleeping
- They skip the afternoon nap but take a morning nap (or vice versa)
- They stay cheerful until bedtime even when a nap is missed
- They can comfortably stay awake for 4 to 5 hours without getting fussy
- Their nap lengths have become unpredictable when they used to be consistent
The key word is “consistently.” A few rough nap days don’t mean it’s time to drop one. Illness, teething, or a regression can temporarily make naps look unnecessary when they’re still needed. Wait for a clear two-week pattern before making the switch. When you do transition, most families move the remaining nap to just after lunch, aiming for a 1- to 2-hour sleep that bridges the gap between morning and bedtime.
Setting Up the Right Sleep Environment
A few environmental factors make a measurable difference in how easily your toddler falls asleep and stays asleep. Keep the room dark, cool, and quiet. Indoor humidity between 35 and 50 percent is ideal for comfortable breathing; air that’s too dry can cause congestion and restless sleep, while air that’s too humid encourages mold growth. A simple hygrometer (available for a few dollars) can help you monitor this.
Screen time before bed is worth being deliberate about. Screens suppress melatonin, the hormone that signals the brain it’s time to sleep. Even a short video close to bedtime can delay sleep onset. Building a screen-free buffer of at least 30 to 60 minutes before bed, filled with calmer activities like books or songs, helps your toddler’s body shift into sleep mode naturally.
Consistency with the bedtime routine itself matters more than what the routine contains. Whether it’s bath, pajamas, book, and crib, or some other sequence, doing the same thing in the same order every night creates a predictable signal that helps your 1-year-old wind down. Most toddlers at this age do well with a bedtime between 7:00 and 8:00 p.m., adjusted based on when their last nap ended and how tired they seem.