State + age guide · 4-year-olds in California · 2026–27
What grade is a 4-year-old in California?
A 4-year-old in California is not yet in kindergarten — but eligible for Transitional Kindergarten (TK) if their birthday falls on or before the September 1 kindergarten cutoff for 2026–27. If they turn 5 after September 1, they're not yet in school (preschool age).
Quick answer
- Born on or before September 1: not yet in kindergarten — but eligible for Transitional Kindergarten (TK)
- Born after September 1: not yet in school (preschool age)
- California's kindergarten cutoff is September 1, and it offers Transitional Kindergarten (TK) for children who just miss it.
Calculate the exact grade
Enter your child's real birthday to confirm which side of the California cutoff they fall on.
Frequently asked
What grade is a 4-year-old in California for the 2026–27 school year?
It depends on their birthday. California uses a September 1 kindergarten cutoff, so a 4-year-old born on or before September 1 is not yet in kindergarten — but eligible for Transitional Kindergarten (TK), while one born after September 1 is not yet in school (preschool age).
What's the kindergarten cutoff birthday in California?
Children must turn 5 by September 1.
Is a 4-year-old eligible for Transitional Kindergarten (TK) in California?
Yes — a 4-year-old who turns 5 just after the September 1 kindergarten cutoff is typically eligible for TK, California's state-funded year between preschool and kindergarten. The 2026–27 year is under universal TK eligibility for all 4-year-olds.
Related
- What grade is a 5-year-old in California?
- All ages in California →
- 4-year-olds in every state →
- California Transitional Kindergarten (TK) guide →
Source
California Department of Education — verify the cutoff and TK eligibility with your local school district before relying on this page for enrollment.
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