How much sleep does a 20-month-old need?

The AAP and CDC recommendation for ages 1–2 is 11–14 hours in 24 hours, the same as the National Sleep Foundation range. A 20-month-old typically sleeps 10–12 hours at night plus a 1–1.5 hour nap.

What wake window does a 20-month-old need?

About 5.5 hours before the nap and 5.5 hours after it. On days sleep was broken — illness, travel, a late night — shorten both windows by 15–30 minutes rather than pushing through.

How do I handle nap skipping at 20 months?

Offer nap time daily even when it fails, keep the room dark and boring, and treat a skipped nap as a signal for bedtime 30–60 minutes earlier — not for a later bedtime, which only makes tomorrow harder.

Is there a sleep regression coming for a 20-month-old?

The 18-month window can stretch to 20 months; the next classic regression is the 2-year sleep regression between 24 and 30 months. Both bring night wakes and nap strikes and usually pass within a few weeks.

Monthly schedule · 20 months

20-Month-Old Sleep Schedule

Here is a realistic day for a 20-month-old: wake up around 7:00 AM, one nap at 12:30 PM, then bedtime around 7:30 PM. Wake windows run 5 to 6 hours, and total sleep lands near 11 to 14 hours. Shift any time 15 to 30 minutes to fit your family, consistency beats the exact minute.

Not medical advice. Typical ranges, not targets — ask your pediatrician about your child.

A sample day for a 20-month-old

Wake up

7:00 AM

Nap

5.5 hours awake

12:30 – 2:00 PM

Bedtime

5.5 hours after the nap

7:30 – 8:00 PM

Wake windows: 5 – 6 hours

1 nap

11 – 14 hours (10 – 12 at night + 1 nap)

What’s changing at 20 months

Daycare or travel can make the nap disappear some days. Keep the anchors: same wake time, same wind-down before nap, and an earlier bedtime after any missed nap so the debt does not compound.

Frequently asked questions

How much sleep does a 20-month-old need?: The AAP and CDC recommendation for ages 1–2 is 11–14 hours in 24 hours, the same as the National Sleep Foundation range. A 20-month-old typically sleeps 10–12 hours at night plus a 1–1.5 hour nap.
What wake window does a 20-month-old need?: About 5.5 hours before the nap and 5.5 hours after it. On days sleep was broken — illness, travel, a late night — shorten both windows by 15–30 minutes rather than pushing through.
How do I handle nap skipping at 20 months?: Offer nap time daily even when it fails, keep the room dark and boring, and treat a skipped nap as a signal for bedtime 30–60 minutes earlier — not for a later bedtime, which only makes tomorrow harder.
Is there a sleep regression coming for a 20-month-old?: The 18-month window can stretch to 20 months; the next classic regression is the 2-year sleep regression between 24 and 30 months. Both bring night wakes and nap strikes and usually pass within a few weeks.

Sources: American Academy of Pediatrics (AAP) and CDC sleep guidance for toddlers, plus National Sleep Foundation (NSF) ranges for children aged 1–3. Not medical advice — these are typical ranges, not targets. If you have questions about your child’s sleep or development, ask your pediatrician.