Age to start school
Find the minimum age to start school in your state. The starting age is set by the kindergarten cutoff date — enter your child's birthday to see when they can first enroll.
Select your country and region, then choose the child's date of birth to see their grade and school timeline.
The starting age in the US is not a fixed number
Most people know that children start kindergarten "at age 5," but the precise answer is more nuanced. Children must be 5 years old by a specific cutoff date — not just sometime during the school year. In a September 1 state, a child must turn 5 on or before September 1. A child born September 2 technically turns 5 during the school year but must wait until the following fall. The effective starting age ranges from 4 years and 8 months (a July-born child in a July 31 cutoff state like Hawaii) to nearly 6 years old (an August-born child in a September 1 state who holds off).
How the starting age varies internationally
Outside the US, starting ages differ significantly. English children start Reception — the equivalent of kindergarten — at age 4, making England one of the youngest-starting school systems in the world. Scotland also starts at 4 for most children. Finland, by contrast, begins formal school at 7, with structured preschool at 6. Australia starts at 4–5 depending on the state. Canada mirrors the US closely at age 5. The calculator supports all of these systems — select your country and region for the correct starting age.
Compulsory school age vs. kindergarten age
In some US states, kindergarten attendance is not compulsory even though the child is eligible. Compulsory school age (the age by which a child must be enrolled in school) is separate from kindergarten eligibility. Most states set compulsory school age at 6. However, not attending kindergarten may affect Grade 1 placement — many schools will assess whether a child who skipped kindergarten is ready for Grade 1.
FAQ
What is the minimum age to start kindergarten?
Children must typically be 5 years old on or before the state cutoff date to start kindergarten. The cutoff ranges from July 31 (Hawaii) to January 1 (Connecticut). Select your state in the calculator to see the exact threshold.
Can a 4-year-old start kindergarten?
In most US states, no — children must be 5. However, in states with very late cutoffs (like December 1 in Michigan), a child born in November who turns 5 by the cutoff may still be considered 4 when the school year starts in August, even though they technically qualify.
What age do children start school in England?
In England, children start Reception (the first year of statutory schooling) in the September after their 4th birthday. The cutoff is August 31 — the youngest school-starting age of any major English-speaking country.