21 month old sleep schedule: Bedtime and nap schedule
Updated Feb 25, 2025
By 21 months, your toddler will likely have quite the vocabulary! At this age, many toddlers know at least 50 words and are able to put two words together to form short phrases. Toddlers in this age group also have lots of energy and seem to be constantly moving. With so much activity and language development occurring, it’s important for your child (and you!) to have some downtime during the day to rest and recharge. Well-timed naps can also cut down on and eliminate overtiredness at bedtime.
Curious about just how much sleep your 21 month old needs, and what an ideal schedule looks like at this age? Read on to learn more about your child’s sleep needs, including recommended naptime and bedtime for 21 month olds.
Editor’s note
The recommendations listed below represent the average amount of sleep typically needed at this age. However, please note there is a range of normal as some children have lower or higher sleep needs. Your child’s schedule may vary, and that is normal.
How much should a 21 month old sleep?
21 month olds need at least 12.5 hours of total sleep per day to be sufficiently rested. Pediatric sleep experts recommend aiming for at least 11 hours of nighttime sleep, and 1.5 - 2.5 hours of daytime sleep.
[Note: for children who were born early, we go by their adjusted age for sleep development.]
Here's a quick overview of what you may expect when it comes to 21 month olds and sleep. Note that these figures are averages and should be used as guidelines.
| Average total sleep | 12.5 hours |
| Number of naps | 1 |
| Goal daytime sleep | 1.5 - 2.5 hours |
| Wake windows | 5 - 5.75 hours |
Top sleep tip for 21 month olds
Around 21 months old, many toddlers will gain another set of molars. During this time, it’s not uncommon for toddlers to need more comforting, especially at night. To reduce pain and inflammation caused by teething, consider feeding your child frozen treats such as blueberries, yogurt popsicles, or homemade milk popsicles before bed. If your child seems especially uncomfortable as the molars emerge, check with your pediatrician before using any over-the-counter teething remedies or pain medication.
Sleep fact for 21 month old babies
Although your toddler may not show obvious signs of needing a nap, it’s still important to keep to your nap schedule. Skipped naps are the leading cause of tantrums and can make for difficult evenings. Overtired toddlers may also have difficulty staying awake at dinner, or be too cranky to eat well, causing them to wake up in the night, and keep that cycle going.
A well-timed nap ensures your child has adequate time to rest after a busy morning, and will help you make it to an age-appropriate bedtime.
Sample 21 month old sleep schedule
Note: Sleep needs vary by child and this chart should be viewed as an example.
Morning rise: 7:00 AM
Wake window before nap: 5 hours
Nap: 12:15 PM - 2:15 PM (2 hour nap)
Get ready for bed: 7:15 PM
Wake window before bedtime: 5.75 hours
Asleep: 8:00 PM
Naptime schedule for a 21 month old
21 month olds should . At this age, we like to see about 5.25 hours of awake time before a nap.
How long should a 21 month old nap?
Total daytime sleep for a toddler should be 1.5 - 2.5 hours for 21 month olds.
How many naps for a 21 month old?
You can expect your toddler to need 1 nap, usually around 1.5 - 2.5 hours. If they’re consistently fighting their nap, keep encouraging that downtime in their crib for them. Even resting quietly can help them recharge, and sometimes they’ll surprise you by suddenly falling asleep, just as you think they’re going to avoid napping entirely.
1-nap schedule
| Morning rise | 7:00 AM |
| Nap | 12:15 PM - 2:15 PM (2 hour nap) 5.25 hours awake time before nap |
| Get ready for bed | 7:15 PM |
| Asleep | 8:00 PM 5.75 hours awake time before bedtime |
1-nap schedule with short nap/early bedtime
| Morning rise | 6:00 AM |
| Nap | 11:15 AM - 12:45 PM (1.5 hour nap) 5.25 hours awake time before nap |
| Get ready for bed | 5:45 PM |
| Asleep | 6:30 PM 5.75 hours awake time before bedtime |
Bedtime for a 21 month old
Although toddlers love their independence, they thrive on routine. Having a consistent bedtime routine helps your child know what to expect, and helps them feel confident and in control. The average bedtime routine at this age is typically 30 - 45 minutes long.
A typical routine consists of a bath, brushing teeth, putting on pajamas, saying goodnight to everyone, reading a book or two, turning on , and singing lullabies. When planning bedtime, work backward from your child needing time to fall asleep (about 10 - 20 minutes), plus time for the routine itself. For independent toddlers, add in extra time for the tasks they like to do themselves that inevitably take twice as long.
If it’s taking longer than 10 - 20 minutes for your child to fall asleep, consider adjusting the awake period before bed. Other reasons it may be taking your toddler a long time to fall asleep include evening sugar intake, light entering the room, or distractions such as toys in the crib.
What time should a 21 month old go to bed?
21 month olds need at least 11 hours of sleep per night to support the brain’s executive function and ensure proper baby development. For many families, this means bedtime is between 6:00 - 8:00 PM.
If you're curious about what lies ahead in the coming month, glimpse into the future to see what you might experience once your baby is on a . Also check out a to see how far your little one has come.
21 month old baby sleep FAQ
Q: My child fell asleep in the car just before bedtime. Should we do our usual bedtime routine or skip it?
A:
At this point, it’s best to fast forward to bedtime. Attempting to carry out your usual bedtime routine will likely end in tears...sometimes for both of you. Keep the lights low as you brush your toddler's teeth and get them dressed for bed, quickly say goodnight, and let them fall back asleep.Q: My child wakes up asking for water in the middle of the night. What can I do?
A:
Although it’s understandable you want to grab them a quick glass of water, late-night water requests can be disruptive to your toddler’s sleep, and can start to form a habit you don’t want to start. Enter: the independence they seek! Keep a spill-proof cup of water within reach of their sleep space.Q: We’re planning a vacation soon. What can we do to avoid getting off track?
A:
First, consider bringing a few items along that will help your child feel at home while sleeping in a new environment, like their lovey, familiar bedding, and a white noise machine. Pack some of their favorite books to read before bed, and give them ample time to become familiar with their temporary sleep space - testing out a new bed, playing with toys in the crib, etc. If you’re heading to a different timezone, experts recommend keeping your child on their usual wake and bedtime schedule, unless you’re staying more than 4 - 5 days or you’re traveling multiple time zones. If you plan to adjust to local time, do so right away, and use sunlight to help signal when it’s time to sleep. Keep in mind that toddlers with healthy sleep habits are less likely to get off track, so try your best to ensure your child is well-rested leading up to the trip.Share article:
Note: The content on this site is for informational purposes only and should not replace medical advice from your doctor, pediatrician, or medical professional. If you have questions or concerns, you should contact a medical professional.
