Kindergarten Start Date Calculator
When will my kid start kindergarten? At age 5, in the fall after they turn 5 by your state's cutoff: 24 states plus DC use September 1 or a date within the following month, 6 use August 1, New York allows December 1 and Connecticut January 1. Enter your child's birthday and state below and the kindergarten start date calculator gives the exact start year, the age your child will be, and their full K-12 timeline through graduation. For every state's exact deadline, see our full guide to kindergarten cutoff dates by state.
Updated 2026. Cutoff dates checked against each state's education department.
Alabama Cutoff:
Children must turn 5 by September 1st to start kindergarten that year.
Being the oldest in the class often provides academic and social advantages that can last throughout a child's school career.
Understanding Kindergarten Cutoff Dates
Every state sets a specific date by which children must turn five to be eligible for kindergarten that year. These cutoff dates vary widely, some states require children to turn five by August 1st, while others allow enrollment if they'll turn five by December 1st.
But eligibility doesn't always equal readiness. Many experts recommend that children born close to the cutoff date, especially in the few weeks or months before it, benefit from waiting an additional year. This practice, sometimes called "academic redshirting," gives children extra time for social, emotional, and cognitive development.
Kindergarten cutoff dates by state at a glance
A child must turn 5 on or before this date to start kindergarten that fall. Grouped from the same table the calculator uses.
| Cutoff (turn 5 by) | States |
|---|---|
| September 1st | Alabama, Alaska, Arizona, California, Florida, Georgia, Idaho, Illinois, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, New Mexico, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Texas, Utah, West Virginia, Wisconsin |
| August 1st | Arkansas, Hawaii, Indiana, Kentucky, Missouri, North Dakota |
| September 30th | Washington DC, Louisiana, Nevada, New Hampshire, Ohio, Virginia |
| August 31st | Delaware, Kansas, North Carolina, Washington |
| October 1st | Colorado, New Jersey |
| September 15th | Iowa, Wyoming |
| January 1st | Connecticut |
| October 15th | Maine |
| September 10th | Montana |
| July 31st | Nebraska |
| December 1st | New York |
| August 15th | Tennessee |
| Varies by district | Vermont |
Transitional kindergarten (TK) age
California runs a public transitional kindergarten year before kindergarten. Under the state's universal TK rollout, a child is TK-eligible for the school year in which they turn 4 by the state's enrollment cutoff, then starts kindergarten the following year at 5. Other states offer pre-K rather than TK; the calculator's start year is the kindergarten year, so a California child in TK starts one year earlier than the date shown.
How old are you in kindergarten?
Most kindergarteners are 5 at the start of the year and turn 6 during it. With the range of state cutoffs and families who delay a year, the spread in one classroom runs from about 4 years 9 months to just over 6. The calculator shows your child's age on the first day so you can see where they would sit in that range.
Key Decision Factors
- Age relative to classmates matters more than absolute age
- Social-emotional maturity often predicts success better than academic skills
- Boys and girls may develop at different rates, consider individual readiness
- The "relative age effect" can impact confidence and achievement for years
Common Questions
Should I start my child in kindergarten if they barely make the cutoff?
This depends entirely on your child's individual development. Consider factors beyond academics: Can they sit still for structured activities? Do they separate from you comfortably? Can they follow multi-step instructions and play cooperatively? Many pediatricians and educators suggest that children born in the 2-3 months before the cutoff often benefit from waiting, especially boys who may develop more slowly in executive function skills.
What if my child misses the cutoff by just a few days?
While frustrating, most states strictly enforce cutoff dates. However, some districts offer early entrance evaluations for children who demonstrate exceptional readiness. These usually involve comprehensive testing of academic, social, and developmental skills. Contact your school district to inquire about early entrance procedures if you believe your child is ready despite missing the cutoff.
Is this a school age calculator for the USA?
Yes. It uses the kindergarten entry cutoff for all 50 states and Washington DC and then projects the full K-12 timeline: 1st grade at 6, 5th grade at 10, 8th grade at 13, and high school graduation at 17 or 18. It does not cover school systems outside the US.
How does kindergarten timing affect long-term academic success?
Research consistently shows that being among the oldest students in a grade provides advantages that can persist throughout school. Older kindergarteners tend to have better academic performance, higher graduation rates, and increased college attendance. The maturity difference between the youngest and oldest students in a classroom can be nearly a full year, significant when you're only five years old.
