What grade is a 4 year old in?

Age 4 · 2026–27

Preschool (3s) or pre-K

A 4-year-old is usually in preschool or pre-K. Which one depends on their birthday and your state's kindergarten cutoff (September 1 in most states).

For 2026–27: pre-K if born Sep 2, 2021 – Sep 1, 2022.

Preschool if born Sep 2, 2022 – Sep 1, 2023.

Grade by age is a guide, not a rule. Some families wait a year to start kindergarten (often called redshirting), some schools allow early entry, and homeschoolers can place a child by readiness in each subject.

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Age by grade for 2026–27 (September 1 cutoff)
Grade	Typical age	Birthdates
Preschool (3s)	3–4	Sep 2, 2022 – Sep 1, 2023
Pre-K (4s)	4–5	Sep 2, 2021 – Sep 1, 2022
Kindergarten	5–6	Sep 2, 2020 – Sep 1, 2021
1st grade	6–7	Sep 2, 2019 – Sep 1, 2020
2nd grade	7–8	Sep 2, 2018 – Sep 1, 2019
3rd grade	8–9	Sep 2, 2017 – Sep 1, 2018
4th grade	9–10	Sep 2, 2016 – Sep 1, 2017
5th grade	10–11	Sep 2, 2015 – Sep 1, 2016
6th grade	11–12	Sep 2, 2014 – Sep 1, 2015
7th grade	12–13	Sep 2, 2013 – Sep 1, 2014
8th grade	13–14	Sep 2, 2012 – Sep 1, 2013
9th grade	14–15	Sep 2, 2011 – Sep 1, 2012
10th grade	15–16	Sep 2, 2010 – Sep 1, 2011
11th grade	16–17	Sep 2, 2009 – Sep 1, 2010
12th grade	17–18	Sep 2, 2008 – Sep 1, 2009

Cutoff source: NCES State Education Reforms, Table 1.3: kindergarten entrance requirements by state. Checked October 2026.

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A 4-year-old is usually in pre-K (the 4s class), or in preschool if they turned 4 after the fall cutoff. Most 4-year-olds start kindergarten the fall after they turn 5.

In a state with a September 1 cutoff, children born between September 2, 2021, and September 1, 2022, are in pre-K for 2026–27 and start kindergarten in fall 2027. States with later cutoffs, like Colorado (October 1) or New York City and many New York districts (December 1), let some 4-year-olds start kindergarten in the fall and turn 5 that autumn. California's transitional kindergarten also serves many 4-year-olds the year before kindergarten.

Use the calculator above for an exact answer: enter your child's birthdate and choose your state, and it applies that state's kindergarten cutoff to the 2026–27 school year. Grade by age is a guide, not a rule. Homeschool families can place a child by readiness, even at different levels in different subjects.

Tips for using it

If your child turns 5 within a few weeks of your state's cutoff, ask your district about early entry rules before you plan the year.
Pre-K at home can be 20–30 minutes of focused play-based learning a day, plus reading aloud.

Variations

All what grade is my child

Questions

Can a 4-year-old go to kindergarten?

Sometimes. A child who turns 5 by the state cutoff can start kindergarten while still 4 at the start of the school year, which is common in states with October or December dates. Some states and districts also allow early entry after an assessment.

Is pre-K free?

It depends on your state and district. Many states fund pre-K for some or all 4-year-olds, and Head Start serves families who qualify by income. Check your state education department.