By the PriorityLearn Editorial Team · Last updated June 2026
In the United States, children usually start kindergarten at age 5 and finish 12th grade at age 17 or 18. Each grade lines up with a one-year age band, but a student’s exact age in any grade depends on their birthday, their state’s school-entry cutoff date, and whether they ever repeated or skipped a year. Below is the full grade-by-age chart, the reverse age-to-grade lookup, and the rules that explain why two kids in the same grade can be a year apart.
US grade levels by age (full chart)
| Grade | Typical age | School stage |
|---|---|---|
| Pre-K | 3–5 | Preschool |
| Kindergarten | 5–6 | Elementary |
| 1st grade | 6–7 | Elementary |
| 2nd grade | 7–8 | Elementary |
| 3rd grade | 8–9 | Elementary |
| 4th grade | 9–10 | Elementary |
| 5th grade | 10–11 | Elementary |
| 6th grade | 11–12 | Middle school |
| 7th grade | 12–13 | Middle school |
| 8th grade | 13–14 | Middle school |
| 9th grade (Freshman) | 14–15 | High school |
| 10th grade (Sophomore) | 15–16 | High school |
| 11th grade (Junior) | 16–17 | High school |
| 12th grade (Senior) | 17–18 | High school |
Each grade above links to a full breakdown of its typical age, the youngest and oldest a student can be, and how birthdays and cutoffs shift it.
What grade is my child? (age-to-grade lookup)
If you know the age and want the grade, read the chart the other way. These are the grades a child of each age is typically in during the school year:
| Age | Typical grade |
|---|---|
| 5 years old | Kindergarten |
| 6 years old | 1st grade |
| 7 years old | 2nd grade |
| 8 years old | 3rd grade |
| 9 years old | 4th grade |
| 10 years old | 5th grade |
| 11 years old | 6th grade |
| 12 years old | 7th grade |
| 13 years old | 8th grade |
| 14 years old | 9th grade (freshman) |
| 15 years old | 10th grade (sophomore) |
| 16 years old | 11th grade (junior) |
| 17 years old | 12th grade (senior) |
A child who turns the listed age before their state’s cutoff date is usually in the higher grade; one who turns it just after may be a grade lower. The cutoff rules are explained below.
What each school stage is called
Elementary school (kindergarten–5th grade)
Elementary covers kindergarten through 5th grade in most districts, ages 5 to 11. Some districts run kindergarten through 6th. Children usually stay with one main teacher for most of the day.
Middle school (6th–8th grade)
Middle school, sometimes called junior high, usually runs 6th through 8th grade, ages 11 to 14. This is where students start changing classrooms for different subjects.
High school (9th–12th grade)
High school is 9th through 12th grade, ages 14 to 18, and each year has its own name: freshman (9th), sophomore (10th), junior (11th), and senior (12th). For the full naming guide, see what 9th–12th graders are called.
Starting school: kindergarten entry and cutoff dates
Most states require a child to turn 5 by a set date to start kindergarten that year. According to the National Center for Education Statistics, state entry-age cutoffs cluster between September 1 and the end of the calendar year, with September 1 the single most common date. A few states leave the date to local districts.
The practical effect: a child born in late summer can be one of the youngest in the class, while a child born in early fall starts a year later and is among the oldest. Compulsory attendance, the age at which the law requires a child to be in school, typically begins at 6 and runs to 16, 17, or 18 depending on the state.
Why a student’s age in a grade can vary
The charts show the typical age, but two students in the same grade can be a full year apart. The reasons:
- State cutoff dates. A child born just before the cutoff starts a year younger than one born just after.
- Redshirting. Some parents delay kindergarten by a year so their child is older and more ready, common with summer birthdays.
- Repeating a grade. A retained student is a year older than peers.
- Skipping a grade. A student who skips is a year younger than peers.
- Transfers from other countries with different grade structures can shift placement either way.
That is why a question like “can you be 15 or 16 in 8th grade?” has a real answer: yes, and it is completely normal.
Moving up: elementary, middle, and high school transitions
Students change schools twice in a typical K–12 path. The first jump is from elementary to middle school around 6th grade (age 11), when single-classroom days give way to changing rooms for each subject. The second is from middle to high school at 9th grade (age 14), when grades start counting toward graduation and a GPA. Knowing a child’s grade-by-age placement makes both transitions easier to plan for.
Is my child ready for their grade?
Age is only a starting point. Schools and parents also look at whether a child is developmentally ready for the grade their birthday assigns them. A few practical signals:
- Starting kindergarten: readiness shows up in basic independence (following two-step directions, separating from a parent, holding a pencil, recognizing some letters and numbers) more than in academics. A child who turns 5 right at the cutoff but isn’t there yet is a common reason families choose to wait a year.
- Young for the grade: a child who is among the youngest may need more time on focus and stamina early on, then even out by 2nd or 3rd grade. It is rarely a long-term disadvantage on its own.
- Old for the grade: a child who started late or repeated a year is usually one of the most confident in the room, though some parents watch the social fit in the later teen years.
If you are unsure where a child belongs, your local school district makes the final placement call and can assess readiness directly. The age charts above tell you the default; the school confirms the fit.
Is there a 13th grade in the US?
Standard US K–12 education ends at 12th grade, so there is no regular 13th grade. A small number of programs use the term for an optional transition or career-prep year after high school, but the vast majority of American students finish at 12th grade and move on to college, work, or a gap year. The full explanation is in is there a 13th grade?
Frequently asked questions
What age is 1st grade?
Students are typically 6 to 7 years old in 1st grade in the United States.
What grade is a 10-year-old in?
A 10-year-old is usually in 5th grade, the final year of elementary school in most districts.
What age are you in each grade?
Kindergarten starts at age 5, and each grade adds about one year: 1st grade is 6–7, 5th is 10–11, 8th is 13–14, and 12th grade is 17–18.
What grade is a freshman?
A freshman is a 9th grader, typically 14 to 15 years old and in their first year of high school.
How old is a senior in high school?
A senior is in 12th grade and is usually 17 or 18 years old, depending on their birthday and graduation timing.
What age do you start kindergarten?
Most children start kindergarten at age 5, provided they turn 5 by their state’s cutoff date, which is most often September 1.
Why are some students older than others in the same grade?
State enrollment cutoff dates, delayed starts (redshirting), and repeating or skipping a grade all mean two students in the same grade can be up to a year apart in age.
Is there a 13th grade?
No. Standard US schooling ends at 12th grade. Only a few special transition or career programs use the “13th grade” label.
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