Grade level reference
The table below shows the typical age range for each school grade in the US, assuming a September 1 kindergarten cutoff — the most common cutoff date. Because the cutoff varies by state, your child's actual grade may differ by one year. Use the school age calculator with your state's exact cutoff for a precise answer.
| Grade | Age in September | Stage | Nickname / notes |
|---|---|---|---|
| Pre-K | 3–4 | Preschool | Optional; not compulsory in most states. Typically ages 3–4. |
| Kindergarten (K) | 5 | Elementary | First year of compulsory school in most states. |
| Grade 1 | 6 | Elementary | |
| Grade 2 | 7 | Elementary | |
| Grade 3 | 8 | Elementary | State reading assessments often administered here (3rd-grade reading laws). |
| Grade 4 | 9 | Elementary | |
| Grade 5 | 10 | Elementary | Final year of elementary school in K–5 districts. |
| Grade 6 | 11 | Middle School | First year of middle school in K–5 / 6–8 / 9–12 districts. Subject-teacher rotation begins. |
| Grade 7 | 12 | Middle School | |
| Grade 8 | 13 | Middle School | End of middle school; high school placement decisions made. |
| Grade 9 | 14 | High School | Freshman year. High school transcript begins; credits count toward graduation. |
| Grade 10 | 15 | High School | Sophomore year. PSAT usually taken in October. |
| Grade 11 | 16 | High School | Junior year. SAT/ACT, AP exams; college visit season. |
| Grade 12 | 17–18 | High School | Senior year. College applications, graduation. Dual enrollment is common. |
Why ages show as a range
The "Age in September" column shows the age a child enters each grade at the start of the school year. The ranges (e.g., "5" for kindergarten) actually span two consecutive ages over the course of the year: a child who turns 5 in September starts kindergarten at 5, but turns 6 by May of the same school year. The table above shows the entry age — what the child's age is in September when they first walk into that grade.
An additional source of within-grade age variation is the cutoff date itself. In a September 1 state, a child born on August 31 starts kindergarten at 4 years and 11 months — barely 5. A child born on September 2 the year before waits until they are almost 6. Both are in the same kindergarten class, nearly 12 months apart in age. This is the relative age effect, and it influences academic and sports outcomes well into adolescence.
School structure by district type
The stage transitions in the table above assume the most common US structure: K–5 elementary, 6–8 middle school, 9–12 high school. Other configurations exist:
| Structure | Elementary | Middle | High School | Common in |
|---|---|---|---|---|
| K–5 / 6–8 / 9–12 | K–5 | Grades 6–8 | Grades 9–12 | Most US districts |
| K–6 / 7–8 / 9–12 | K–6 | Grades 7–8 | Grades 9–12 | Northeast, some Midwest |
| K–8 / 9–12 | K–8 (combined) | — | Grades 9–12 | Urban areas, smaller districts |
| K–12 | K–12 (one campus) | — | — | Rural districts |
Grade levels in the UK (for comparison)
Families moving between the US and UK frequently need to match grade levels. UK children start one year earlier (Reception at age 4), which shifts the entire sequence:
| US grade | UK year (England) | Typical age |
|---|---|---|
| Pre-K | Nursery | 3–4 |
| Kindergarten | Reception | 4–5 |
| Grade 1 | Year 1 | 5–6 |
| Grade 2 | Year 2 | 6–7 |
| Grade 3 | Year 3 | 7–8 |
| Grade 4 | Year 4 | 8–9 |
| Grade 5 | Year 5 | 9–10 |
| Grade 6 | Year 6 | 10–11 |
| Grade 7 | Year 7 | 11–12 |
| Grade 8 | Year 8 | 12–13 |
| Grade 9 | Year 9 | 13–14 |
| Grade 10 | Year 10 | 14–15 |
| Grade 11 | Year 11 | 15–16 |
| Grade 12 | Year 12–13 (Sixth Form) | 16–18 |
For a precise grade calculation based on your child's exact birthday and your region's cutoff date, use the school age calculator. It covers the US (all 50 states), Canada (all provinces), Australia (all states), and the UK (England, Scotland, Wales, Northern Ireland).