Month-by-month sleep guide
18-Month-Old Sleep Schedule
- ⏰ Wake window: 5–6 hours
- 🍼 Naps per day: 1
- 🌙 Bedtime: 7:30 PM
- 😴 Total sleep: 11–14 hours
Reviewed by the BabyNapCalc Editorial Team — our content is reviewed for accuracy against pediatric sleep guidance (AAP/NSF). This is general information, not medical advice.
The 18-month sleep regression, a language explosion, and one nap settling in — the complete 18-month-old sleep schedule with wake windows and bedtime.
18-month-old sleep at a glance
Typical ranges for 18 months — every toddler is different, so treat these as a starting point.
5–6 h
Between sleep periods
Typical at 18 months
1
1 nap
Rest of sleep at night
11–14 h
Naps + night combined
Typical for this age
Sample 18-month-old schedule
An example day with a 7:00 AM wake, built from this month’s wake windows. Use the mini calculator above with your real wake time.
12:30 PM – 2:00 PM
Nap 1
About 90 minutes
7:30 PM
Bedtime
End of the day
Sleep at 18 months
Eighteen months is famous for one thing: the 18-month sleep regression. But there's good news underneath — by now the single nap has usually firmed up, with wake windows of 5–6 hours and 11–14 hours of total sleep per day. Add a language explosion (new words daily), peak separation anxiety, and often molars coming in, and you have the perfect recipe for a few rough weeks. The schedule below still works; it just needs defending.
Wake windows: 5–6 hours
The settled one-nap day: wake around 7 AM, nap around 12:30 PM for 1.5–2.5 hours, bedtime between 7 and 8 PM. During the regression, you may be tempted to shorten wake windows or add the nap back — don't. Keep the same windows and the same bedtime; consistency is what carries toddlers through regressions fastest.
The 18-month sleep regression
It typically lasts 1–3 weeks and can show up as bedtime refusal, night waking, early morning starts, or nap strikes — sometimes all four. The drivers are developmental, not scheduling: separation anxiety peaks, language is exploding, molars may be erupting, and independence is surging. Survive it by holding the schedule steady, offering extra comfort without introducing new sleep props you'll regret later, and moving bedtime 30 minutes earlier if nights are short. If disrupted sleep persists beyond 3–4 weeks, check in with your pediatrician — and see the 19-month schedule for life after the regression.
One nap firms up — and so does language
Post-transition, the midday nap usually lengthens and becomes the most reliable sleep of the day. Protect it: a well-timed nap (starting 5–5.5 hours after wake) is the foundation the whole day rests on. Meanwhile, the vocabulary explosion means bedtime may feature enthusiastic chatter — charming at 7 PM, less so at 2 AM. Keep night interactions dim, quiet, and brief, and the novelty wears off.
18-month-old sleep questions, answered
Quick answers to the questions parents ask most about sleep at 18 months.
What is the 18-month sleep regression?
A 1–3 week period of disrupted sleep — bedtime battles, night waking, early mornings, or nap refusal — driven by developmental leaps (language explosion, separation anxiety, molars) rather than a bad schedule.
How long does the 18-month sleep regression last?
Usually 1–3 weeks. If short nights or nap refusal persist beyond 3–4 weeks, or your toddler seems unwell, talk to your pediatrician.
Should I change the schedule during the 18-month regression?
No — hold the same wake time, nap time, and bedtime. Changing the schedule mid-regression usually prolongs it. An earlier bedtime (30 minutes) is the one safe adjustment if nights are short.
What time should an 18-month-old go to bed?
Between 7 and 8 PM for a 6–7 AM wake, with one midday nap of 1.5–2.5 hours. The toddler bedtime calculator can pinpoint it from your wake time.
This page is a planning guide based on general pediatric sleep guidance, not medical advice. Every toddler is different — talk to your pediatrician with concerns about your child’s sleep.