How Much Sleep Does A 20-Month-Old Need? | Sleep Hours

When you try to figure out how much sleep does a 20-month-old need, it can feel like the answer changes every week. Growth spurts, teething, new words, and big toddler feelings all press on sleep. The good news: experts give a clear range for this age, and you can fit that range into a rhythm that works for your home.

Sleep at 20 months is about balance. Most toddlers still need one solid nap, an early and predictable bedtime, and enough total hours across the full day. In this guide, you’ll see what the research says, what a realistic schedule looks like, and how to tweak things when naps or nights start to wobble.

How Much Sleep A 20-Month-Old Needs In 24 Hours

Sleep specialists from the American Academy of Sleep Medicine recommend that children ages 1–2 years sleep 11–14 hours across each 24-hour period, including naps. The American Academy of Pediatrics backs these numbers for healthy growth and learning AAP sleep duration guidelines, while NHS services describe a similar range for toddlers ages 1–2 years NHS toddler sleep advice.

A 20-month-old usually sits near the middle of that range. Many toddlers land around 12–13 total hours, split between a long stretch at night and a daytime nap. Some children stay on the higher side and feel best with closer to 14 hours; others cope well with about 11½–12 hours, as long as they wake rested and cheerful.

Age	Total Sleep In 24 Hours	Typical Pattern
4–12 Months	12–16 hours	Night sleep plus 2–3 naps
12–18 Months	11–15 hours	Night sleep plus 1–2 naps
20 Months	12–13 hours (within 11–14 range)	10–12 hours at night plus 1 nap
18–24 Months	11–14 hours	Night sleep plus 1 nap
2–3 Years	10–14 hours	Night sleep plus 0–1 nap
3–5 Years	10–13 hours	Mostly night sleep, nap fades
5–12 Years	9–12 hours	Night sleep only

How Much Sleep Does A 20-Month-Old Need?

Put simply, most families should aim for about 12–13 total hours when they wonder how much sleep does a 20-month-old need. A common split looks like 11 hours at night and a 1½–2 hour nap. The exact mix depends on your child’s biology, day length, and care setting, but the expert range still holds: 11–14 hours in every full day.

The real test is your toddler’s mood and energy. A child at 20 months is usually getting enough rest when:

• They wake on their own most mornings.
• They manage the gap from morning to nap without constant meltdown.
• They fall asleep within about 15–30 minutes at nap and bedtime.
• They have stretches of playful, curious behavior between rest periods.

Signs of too little sleep include long bedtime battles, frequent night wakes without a clear cause, early rising before 5:30 a.m., and regular crankiness in the late afternoon. If you see several of these patterns over many days, total hours or timing likely need a refresh.

Sample 20-Month-Old Sleep Schedule

Once you know the daily sleep range, the next step is slotting those hours into a rhythm that fits your household. At 20 months, most toddlers do well with one midday nap and a bedtime that lands roughly 4½–5½ hours after nap wake-up.

Here is a sample schedule that lands around 13 total hours:

• 7:00 a.m. – Wake for the day.
• 12:15 p.m. – Down for nap.
• 2:00–2:30 p.m. – Wake from nap.
• 7:30 p.m. – Bedtime, lights out.

This layout gives roughly 11 hours at night and a 1¾–2 hour nap. Some children need an earlier start, such as 6:30 a.m., with bedtime moved earlier by the same amount. Others manage a slightly later day, with nap and bedtime shifted by 30–60 minutes.

Adjusting The Schedule For Your Toddler

Every 20-month-old has a personal rhythm. Some sleep long at night and take a short nap. Others protect their nap and shorten night sleep a little. You can adjust within the expert range by watching a few daily cues.

• If bedtime is a battle: shorten the nap by 15–30 minutes or add 15–30 minutes of awake time before bed.
• If mornings start before 5:30 a.m.: try shifting bedtime slightly later in small steps or trimming the nap.
• If your toddler drifts off at the table: move nap earlier, or bring bedtime forward by 20–30 minutes for a few days.
• If daycare sets nap times: match your home schedule as closely as you can to their pattern.

Aim for a similar rhythm each day of the week. Frequent swings in bedtime and wake time can make it harder for a toddler brain to keep a steady sleep-wake pattern.

Nap Needs For A 20-Month-Old

By 20 months, most toddlers have moved to one daytime nap. That nap usually lasts 1–3 hours, with many landing near 1½–2 hours. One long, predictable nap in the middle of the day often leads to deeper night sleep than two short, scattered naps.

Common nap timing for this age:

• Nap starts 5–6 hours after morning wake-up.
• Nap ends by 3:00 p.m. for a bedtime between 7:00 and 8:00 p.m.
• Nap length rarely above 3 hours, to protect night sleep.

If your toddler still takes two naps and night sleep has become short or fragmented, a shift to one nap may help. Gradually push the morning nap later by 15 minutes every few days until it merges with early afternoon, then phase out the late-day nap by gentle distraction and an earlier bedtime.

Bedtime Routine That Helps A 20-Month-Old Sleep

Total sleep hours matter, and so does the lead-up to bedtime. A calming routine tells the body that night is coming and makes it easier for a 20-month-old to hand over to sleep without a long protest.

A typical bedtime routine for this age might include:

• Quiet play and dimmer lights 30–45 minutes before bed.
• A warm bath or quick wipe-down, depending on your preference.
• Pajamas, sleep sack, and tooth brushing.
• One or two short books in a gentle voice.
• A short song or cuddle, then into the crib awake but drowsy.

Try to keep screens out of the last hour before bed, since bright light and fast-moving images can make winding down harder. Keep the room dark or softly lit, cool, and quiet, with a simple comfort item such as a small soft toy if your local safety guidance allows it.

Room Conditions And Sleep Safety

Safe sleep still matters for a 20-month-old. Use a crib or toddler bed that meets current safety standards, with a firm mattress and fitted sheet. Avoid loose pillows and heavy blankets around the face. If your toddler climbs the crib rails, talk with your child’s doctor about when to shift to a low toddler bed and how to keep the room safe in case they wander at night.

White noise at a low, steady volume can help block background noise, such as traffic or siblings. Place any sound machine across the room, not right next to your child’s head, and keep the volume at a level where you can still hear your own voice easily.

Common 20-Month-Old Sleep Problems

Even with a solid schedule, many parents notice a rough patch around 18–20 months. Language surges, climbing skills, and big feelings about separation can all spill into sleep. Nights may suddenly include more calls from the crib, and naps may shorten.

Typical challenges at this age include:

• Nap refusal: Your toddler sings or protests in the crib instead of falling asleep. Keep offering the nap, shorten the window a little, and protect quiet time even on days when sleep does not happen.
• Bedtime protests: Longer cries or requests for “one more” story, drink, or trip out of bed. A short, predictable routine and firm but calm limits usually help.
• Night waking: Teething discomfort, new fears, or habit wakes after a spell of illness can show up here. Short, consistent check-ins can reassure your child without turning the wake into playtime.
• Early rising: Toddlers who wake before dawn often have a bedtime that is too late, a nap that runs too long, or too much light creeping into the room near morning.

Mild ups and downs usually smooth out over a few weeks as your child adjusts. If your toddler seems healthy during the day and gets close to the target number of hours, brief bumps in sleep are common and usually temporary.

When To Talk With A Doctor

Sleep questions sit at the center of life with a toddler, and your pediatrician hears them every day. Reach out for medical advice if you notice:

• Loud snoring most nights or pauses in breathing during sleep.
• Strong restlessness, sweating, or gasping during sleep.
• Persistent total sleep below 10 hours per day, even with a calm routine.
• Night terrors or intense waking episodes that leave you worried.
• Sudden changes in behavior, appetite, or development alongside sleep problems.

Bring a simple sleep log covering several days. Note wake times, nap times, bedtime, night wakes, and any medication or illness. This record helps your child’s doctor see patterns and suggest changes or further checks.

Quick Reference: 20-Month-Old Sleep Snapshot

When days feel chaotic, a single view of ideal timing can help you reset. The table below gives a sample day for a 20-month-old who needs around 13 total hours of sleep. You can shift it earlier or later by small steps, while keeping similar gaps between sleep periods.

Time	What’s Happening	Awake Or Asleep
7:00 a.m.	Wake, breakfast, gentle play	Awake
9:00–11:30 a.m.	Outing, active play, snack	Awake
12:15 p.m.	Wind-down and nap routine	Awake, then drifting off
12:30–2:15 p.m.	Main daytime nap	Asleep
2:15–5:30 p.m.	Snack, play, dinner, calm play	Awake
6:45 p.m.	Bath, pajamas, books, song	Awake, winding down
7:30 p.m.–7:00 a.m.	Night sleep (with brief normal stirrings)	Asleep

Bringing It All Together For Your Family

The central message stays steady: a 20-month-old usually thrives on 11–14 hours of total daily sleep, most often around 12–13 hours split between night and one nap. When you know that range, you can answer the question “how much sleep does a 20-month-old need?” with calm confidence, even when bedtime feels loud.

Use expert guidelines as a guardrail, then shape the details around your child. Watch mood, energy, and how long it takes them to fall asleep. Small, steady tweaks to timing usually work better than big swings. With a predictable schedule, a simple routine, and a room set up for rest, those 11–14 hours become much easier to reach.