What age does my child need to be for kindergarten?

Most US states require children to turn 5 by a specific cutoff date to start kindergarten that fall. The most common cutoff is September 1, but it varies widely: Connecticut uses January 1, Indiana uses August 1, and some states let districts set their own dates. Check the table below for your state.

How do I check if my child makes the cutoff?

Enter your child birthday into an age calculator and set the target date to your state cutoff date (e.g., September 1, 2026). If the result shows 5 years or older, they qualify. If they are 4 years and 11 months, they miss the cutoff and will start the following year.

What is academic redshirting?

Redshirting means intentionally delaying kindergarten entry by one year, even though the child meets the age cutoff. Parents of summer-birthday children sometimes redshirt so their child enters as one of the oldest in the class rather than the youngest. Research is mixed on long-term benefits.

Can I enroll my child early if they miss the cutoff by days?

Some states offer early admission testing for children who miss the cutoff by a small margin. Requirements typically include an assessment showing kindergarten readiness. Contact your district directly — policies vary dramatically even within the same state.

What grade should my child be in based on their age?

The general rule: age 5-6 for kindergarten, 6-7 for 1st grade, adding one year per grade. A child who turns 14 during 8th grade is on track. But cutoff dates, redshirting, and grade retention mean there is no universal answer. The age calculator with your state cutoff date gives the definitive answer.

Does the cutoff date apply to preschool too?

Preschool age cutoffs are less standardized than kindergarten. Most public pre-K programs require age 4 by the same cutoff date as kindergarten (e.g., September 1). Private preschools often have more flexible policies. Head Start programs have their own eligibility based on age and income.

School Age Calculator — Kindergarten Enrollment Cutoff Dates by State

Last updated: April 20266 min readCalculator Tools

Most states require children to turn 5 by September 1 to start kindergarten that fall. A child born September 2 waits an entire year. Use the age calculator to check your child exact age on the cutoff date — the difference between making it and missing it can be a single day.

How to Check

Open the age calculator
Enter your child date of birth
Set the "Calculate Age On" date to your state cutoff (e.g., September 1, 2026)
If the result shows 5 years or older — they qualify for kindergarten

Check your child age on the cutoff date — takes 5 seconds.

Open Age Calculator

Kindergarten Age Cutoffs by State

Most common cutoffs for the 2026-2027 school year:

Cutoff Date	States
August 1	Indiana, Missouri
August 31	Hawaii, Maine, Maryland, Nevada, New Hampshire, Ohio, Oklahoma, Rhode Island, South Dakota, Washington, West Virginia
September 1	Alabama, Arizona, Colorado, Delaware, Florida, Georgia, Idaho, Illinois, Kansas, Louisiana, Minnesota, Mississippi, Montana, New Mexico, North Carolina, North Dakota, Oregon, South Carolina, Tennessee, Texas, Utah, Virginia, Wisconsin, Wyoming
September 15	Michigan
September 30	Iowa, Kentucky, Massachusetts, New Jersey, Vermont, Washington DC
October 1	Arkansas, Nebraska, Pennsylvania, Wisconsin (some districts)
October 15	New York (varies by district)
November 1	Oregon (some districts)
December 1	California (transitional)
January 1	Connecticut
District decides	Alaska, New York (some), Pennsylvania (some)

Note: Some states have changed cutoffs recently or allow district-level variation. Always confirm with your local school district.

The Summer Birthday Dilemma

Children born June through August often face a tough call:

Scenario	Enters As	Pros	Cons
Born July 15, enters on time	One of the youngest in class	Starts school sooner, socializes with peers	May be less mature, smaller physically
Born July 15, redshirted 1 year	One of the oldest in class	More mature, potential academic advantage	Bored if too advanced, extra year of childcare cost
Born Sept 2 (misses cutoff)	Must wait — no choice	Will be older and likely more ready	Full extra year of waiting, childcare needed

Research on redshirting is mixed. A Stanford study found redshirted children had better self-regulation at age 7, but the advantage faded by age 11. The decision is deeply personal and depends on your child, not just their birthday.

Grade Levels by Age — Quick Reference

Grade	Typical Age (September 1 cutoff)	Starting Year if Born in 2020
Pre-K	4-5	2024-2025
Kindergarten	5-6	2025-2026
1st Grade	6-7	2026-2027
2nd Grade	7-8	2027-2028
3rd Grade	8-9	2028-2029
5th Grade	10-11	2030-2031
8th Grade	13-14	2033-2034
9th Grade (HS)	14-15	2034-2035
12th Grade	17-18	2037-2038

Other Calculators for Parents

Age Calculator — exact age on any date (use for cutoff checking)
Date Calculator — count days until school starts
BMI Calculator — pediatric BMI uses age-based percentiles
Calorie Calculator — daily nutrition needs for growing kids
Countdown Timer — countdown to first day of school
GPA Calculator — for older students tracking academic progress
Percentage Calculator — grade percentages and test scores

Enter the birthday, set the cutoff date, know if they qualify.

Open Age Calculator

School Age Calculator — Kindergarten Enrollment Cutoff Dates by State

How to Check

Kindergarten Age Cutoffs by State

The Summer Birthday Dilemma

Grade Levels by Age — Quick Reference

Other Calculators for Parents

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