US School Grade Levels by Age: Full Chart (K–12 + 13th Grade)

Updated July 2026

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. Two kids in the same grade can legitimately be a full year apart in age — the charts and cutoff rules below explain exactly why.

US grade levels by age (full chart)

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:

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 grade is a 9-year-old in?

A 9-year-old is usually in 4th grade, which covers ages 9–10. A child who turns 9 late in the school year may still be finishing 3rd grade — both are normal and depend on where the birthday falls against the state cutoff date.

What grade is a 10-year-old in?

A 10-year-old is usually in 5th grade, the last year of elementary school in most districts (ages 10–11). A 10-year-old with a birthday late in the school year may still be in 4th grade.

What grade is an 11-year-old in?

An 11-year-old is usually in 6th grade — the first year of middle school in most districts (ages 11–12). Some 11-year-olds are still in 5th grade if their birthday falls after the cutoff.

What grade is a 12-year-old in?

A 12-year-old is usually in 7th grade (ages 12–13). A 12-year-old can also be in 6th grade with a late birthday, or in 8th if they skipped a year.

What grade is a 13-year-old in?

A 13-year-old is usually in 8th grade, the final year of middle school (ages 13–14). Depending on their birthday, a 13-year-old may also be in 7th grade — or already a 9th-grade freshman if they started school young.

What grade is a 14-year-old in?

A 14-year-old is usually a freshman in 9th grade, the first year of high school (ages 14–15). A 14-year-old with a late birthday may still be in 8th grade.

What about other ages?

The same one-line logic works down and up the ladder: a 5-year-old is in kindergarten, a 6-year-old in 1st grade, a 7-year-old in 2nd, and an 8-year-old in 3rd. At the top end, a 15-year-old is usually a 10th-grade sophomore, a 16-year-old an 11th-grade junior, and a 17– or 18-year-old a 12th-grade senior. If the birthday falls just after the state cutoff, shift each answer one grade lower.

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.

Kindergarten cutoff dates by state

Most states require a child to turn 5 by a set date to start kindergarten that fall. September 1 is by far the most common cutoff, but the exact date ranges from July 31 to mid-October, and several states leave it to local districts. The table below is based on the National Center for Education Statistics state-policy compilation, with Connecticut updated for its 2024 law change. States do occasionally move these dates — always confirm the current school year’s date with your district before enrolling.

A few states word the rule as “before” rather than “on or before” the date, which shifts eligibility by a single day — another reason the district’s own enrollment page is the final word.

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.

Is delaying kindergarten (redshirting) a good idea?

It depends on the child, not the calendar. Redshirting is most common for children with birthdays within a couple of months of the cutoff, and the usual reasons are maturity, attention span, and physical size rather than academics. Being the oldest in the class can be an early advantage in confidence and stamina, but research on long-term academic benefit is mixed, and most age-driven differences fade by the middle elementary years. If you are weighing it, the readiness signals below and a conversation with the school are far better guides than the birthday alone.

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.

How US grades compare internationally

Other English-speaking school systems group the same ages under different labels, which trips up families moving between countries. The UK comparison is the one people ask about most, so it comes first.

UK year groups vs US grades (full conversion chart)

UK year numbers run one ahead of US grades. A pupil in Year 7 in England is the same age as a US 6th grader, and Year 13 lines up with 12th grade. The offset exists because England’s Year 1 begins at age 5, a year earlier than US 1st grade.

Ages are the typical range during the school year. England, Wales and Northern Ireland all use this Year numbering; Scotland does not (see below). Year groups and ages follow the GOV.UK national curriculum key stages.

Quick answers: what grade is Year 7, Year 10 or Year 13?

• Year 1 is US kindergarten, age 5–6.
• Year 5 is US 4th grade, age 9–10.
• Year 7 is US 6th grade, age 11–12. It is the first year of secondary school in England and, in much of the US, the first year of middle school.
• Year 8 is US 7th grade, age 12–13.
• Year 10 is US 9th grade (freshman year), age 14–15.
• Year 12 is US 11th grade (junior year), age 16–17.
• Year 13 is US 12th grade (senior year), age 17–18.

Scotland uses P1–P7 and S1–S6 instead

Scotland does not use the Year 1–13 labels at all. Primary school runs P1 to P7 and secondary runs S1 to S6, with children starting P1 between roughly 4 and a half and 5 and a half depending on their birthday. That makes Scottish P1 line up with English Reception, and Scottish S1 with English Year 7 (US 6th grade). S1 to S4 are compulsory; S5 and S6 are optional, like the English sixth form.

Canada, Australia and New Zealand

• Canada uses the same grade numbers and ages as the US, Grade 1 at age 6 through Grade 12 at 17–18, with minor provincial differences in cutoff dates.
• Australia and New Zealand also use “Year” labels, but their school year runs January to December, so age alignment shifts by roughly half a year against the US calendar.

When a student transfers, schools place them by age and transcript rather than by the label their old system used. A Year 9 pupil moving from England mid-year is not automatically dropped into 8th grade; the receiving district looks at birthdate and coursework.

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 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 grade is Year 7 in America?

Year 7 in England is the same as 6th grade in the United States. Both are for children aged 11 to 12. UK year numbers run one ahead of US grade numbers.

What is Year 13 in American school?

Year 13 is the final year of school in England and matches US 12th grade, or senior year, at age 17 to 18.

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.

What age is kindergarten?

Kindergarten covers ages 5 to 6. Children must usually turn 5 by around September 1 to enroll that fall, so most kindergartners are 5 at the start of the year and 6 by the end.

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.