State + age guide · 15-year-olds in California · 2026–27
What grade is a 15-year-old in California?
A 15-year-old in California is in 10th grade if their birthday falls on or before the September 1 kindergarten cutoff for 2026–27. If they turn 15 after September 1, they're in 9th grade.
Quick answer
- Born on or before September 1: 10th grade
- Born after September 1: 9th grade
- 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 15-year-old in California for the 2026–27 school year?
It depends on their birthday. California uses a September 1 kindergarten cutoff, so a 15-year-old born on or before September 1 is in 10th grade, while one born after September 1 is in 9th grade.
What's the kindergarten cutoff birthday in California?
Children must turn 5 by September 1.
Related
- What grade is a 14-year-old in California?
- What grade is a 16-year-old in California?
- All ages in California →
- 15-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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