How to use the school age calculator
First, find the current entry rule for your school, district or local authority. You need two things from it: the minimum age and the cutoff date. Then enter them along with the child's full birth date.
The planned first day of school is separate. It shows how old the child will be when classes begin, which is often a few days after the cutoff.
- Enter the child's birth date. A name is optional.
- Type the program name, such as Kindergarten, Reception or Grade 1.
- Enter the minimum age from the rule, such as 5.
- Enter the cutoff date and the planned first school day.
- For a February 29 birth, choose February 28 or March 1 as the common-year birthday.
- Press Check school age and read the result, margin and five-year table.
Kindergarten cutoff examples
These use the rule "age 5 on or before September 1, 2024" and come straight from the calculator. A birthday on the cutoff date itself counts, because the rule says "on or before."
| Birth date | Age on cutoff | Result | Margin |
|---|---|---|---|
| August 15, 2019 | 5 years, 0 months, 17 days | Meets the rule | 17 days to spare |
| September 1, 2019 | 5 years, 0 months, 0 days | Meets the rule | Exactly on the boundary |
| September 2, 2019 | 4 years, 11 months, 30 days | Doesn't meet the rule | 1 day short |
How the cutoff check works
The calculator finds the birthday on which the child reaches the minimum age. If that birthday is on or before the cutoff, the rule is met. The margin is the number of days between the two dates.
It also shows the latest birth date that meets the rule. For age 5 by September 1, 2024, that's September 1, 2019. Any child born later waits a year.
Minimum-age birthday = birth date + minimum age in yearsMeets the rule if minimum-age birthday <= cutoff dateLatest qualifying birth date = cutoff date - minimum age in years
Kindergarten cutoff dates by state
There's no national cutoff in the U.S. States, and sometimes districts, set their own. In the NCES 2020 table of state rules, California, Florida and Texas used 5 on or before September 1. Indiana used August 1 and Virginia used September 30. New York, Ohio and Pennsylvania left it to local districts.
Rules change, so treat that table as a starting point. Check your state education department or district enrollment page for the current school year before you enter a cutoff.
| State | Rule in the 2020 table |
|---|---|
| California | 5 on or before September 1 |
| Florida | 5 on or before September 1 |
| Texas | 5 on or before September 1 |
| Indiana | 5 on or before August 1 |
| Virginia | 5 on or before September 30 |
| New York, Ohio, Pennsylvania | Local district option |
What grade was I in? Working back from a cutoff
This tool doesn't assign grades, but you can work out a U.S. grade by year with one cutoff check. Find the fall you first met the kindergarten rule. That's your kindergarten year. Each fall after it adds one grade.
Say you were born October 10, 2001, under a 5-by-September-1 rule. You turned 5 after the 2006 cutoff, so you started kindergarten in fall 2007. You'd have been in 5th grade in 2012-13 and 12th grade in 2019-20. Born August 15, 2001, you'd be one grade ahead.
This assumes you didn't skip or repeat a year, and that your school used that cutoff.
Kindergarten year = birth year + 5 if the 5th birthday is on or before the cutoff, otherwise birth year + 6Grade in the school year starting fall Y = Y - kindergarten year (0 = kindergarten)
Eligible age isn't the same as compulsory age or readiness
Being old enough to enroll is one rule. Having to attend is another. In England, most children start Reception in the September after they turn 4, but compulsory school age doesn't begin until a set date after their fifth birthday.
The result also says nothing about whether a child is ready. Readiness covers physical, social, emotional and learning skills, and that's a conversation for the family and teachers.
February 29 birthdays and the five-year table
For a leap-day birth, choose whether the birthday falls on February 28 or March 1 in common years. Use the school's rule if it states one, because it can flip a result that lands right on the cutoff.
The five-year table repeats the cutoff for the next four years and shows the child's age each time. It's useful when a birthday just misses this year's cutoff and you want to see the following year. The cutoff itself could change, so check again before you apply.
Sources
These sources cover state entry rules, a sample state policy, England's starting age and school readiness.