Most children in the US start Kindergarten at age 5 and move up one grade each year. So 1st graders are usually 6 to 7, 8th graders are 13 to 14, and 12th graders are 17 to 18. A child’s exact grade depends on their birthday, their state’s cutoff date and local school district rules. The chart below shows the typical age for every grade, from Pre-K to 12th grade.
How Old Are Kids in Each Grade? (Quick Age-by-Grade Chart)
| Grade | Age at start of school year | Age range during the year | School level |
|---|---|---|---|
| Preschool / Pre-K | 3–4 | 3–5 | Early childhood |
| Transitional Kindergarten (TK) | 4 | 4–5 | Early childhood |
| Kindergarten | 5 | 5–6 | Elementary |
| 1st Grade | 6 | 6–7 | Elementary |
| 2nd Grade | 7 | 7–8 | Elementary |
| 3rd Grade | 8 | 8–9 | Elementary |
| 4th Grade | 9 | 9–10 | Elementary |
| 5th Grade | 10 | 10–11 | Elementary |
| 6th Grade | 11 | 11–12 | Elementary or middle |
| 7th Grade | 12 | 12–13 | Middle / junior high |
| 8th Grade | 13 | 13–14 | Middle / junior high |
| 9th Grade (Freshman) | 14 | 14–15 | High school |
| 10th Grade (Sophomore) | 15 | 15–16 | High school |
| 11th Grade (Junior) | 16 | 16–17 | High school |
| 12th Grade (Senior) | 17 | 17–18 | High school |
These ages are in line with national trends from the National Center for Education Statistics (NCES), which says students normally finish grade 12 by age 18.
Quick rule to find the grade
Take your child’s age at the start of the school year and subtract 5. A child who is 9 in September is usually in 4th grade (9 − 5 = 4).
The chart gives two ages because people use “age” in two ways:
- Age at the start of the school year: how old the child is on the first day. Most 3rd graders are 8 when the year begins.
- Age during the school year: the full span, including birthdays. A 3rd grader who is 8 in September and turns 9 in March is in the “8–9” range.
- Why birthdays matter: two children born a few days apart can land in different grades if one birthday falls just before the cutoff date and the other just after.
Typical age by grade: Kindergarten to 12th grade
Each bar shows where a grade sits on the age scale. Numbers in brackets are the typical ages during the school year.
Typical ages assume on-time entry. Source: NCES structure of US education; age ranges as in the chart above.
Understanding US Grade Levels and School Ages
US schooling runs for 13 years, from Kindergarten to 12th grade, in three main stages. NCES says students usually spend 6 to 8 years in the elementary grades, 2 to 3 years in middle school or junior high, and 3 to 6 years in high school, depending on how the district is set up.
How the 13 school years are usually split
Number of school years in each stage (K–5, 6–8, 9–12 structure)
Some districts use K–6, K–8 or 7–9 instead, so the split can differ. Source: NCES.
Elementary School (Kindergarten to Grade 5 or 6)
Elementary school usually covers Kindergarten to 5th grade, for ages 5 to 11. Some districts run it to 6th grade (ages 11 to 12). Children learn to read, write and do basic maths, and they usually stay with one main teacher. Families who want extra practice at home often use the best educational apps for kids alongside school work.
So what grade is a 10-year-old in? In most cases, 5th grade.
Middle School (Grades 6 to 8 or 7 to 8)
Middle school usually covers 6th to 8th grade, for ages 11 to 14. Some areas use the older term “junior high” for grades 7 to 8 or 7 to 9. That is why 6th grade can sit in elementary school and 9th grade can sit in junior high. Students start changing classrooms for each subject and can join clubs and school sports.
Most 6th graders are 11 or 12. Most 8th graders are 13, turning 14 by the end of the school year.
High School (Grades 9 to 12)
High school covers 9th to 12th grade, for ages 14 to 18. Each year has its own name: Freshman (9th), Sophomore (10th), Junior (11th) and Senior (12th). Most students are 17 or 18 in their senior year and graduate at the end of it. These years are also when many teenagers learn to drive and prepare for college or work.
Read also: Year of the Snake Google Game
What Grade Is My Child In Based on Their Age?
Use this table to match a child’s age to a likely grade. Two grades are shown because it depends on whether the child’s birthday falls before or after the school year starts.
| Child’s age | Likely grade |
|---|---|
| 4 years old | Pre-K / TK |
| 5 years old | Kindergarten |
| 6 years old | Kindergarten / Grade 1 |
| 7 years old | Grade 1 / 2 |
| 8 years old | Grade 2 / 3 |
| 9 years old | Grade 3 / 4 |
| 10 years old | Grade 4 / 5 |
| 11 years old | Grade 5 / 6 |
| 12 years old | Grade 6 / 7 |
| 13 years old | Grade 7 / 8 |
| 14 years old | Grade 8 / 9 |
| 15 years old | Grade 9 / 10 |
| 16 years old | Grade 10 / 11 |
| 17 years old | Grade 11 / 12 |
| 18 years old | Grade 12 / graduated |
The first grade shown is for a child who has not yet had their birthday this school year. These are likely placements, not guarantees. For a longer age lookup, see our guide on what grade you are in.
What Age Do Kids Start Kindergarten in the US?
Children usually start Kindergarten at age 5. Most states say a child must turn 5 by a set cutoff date before the school year begins. Miss it by a day and the child normally waits a year.
September 1 is the most common cutoff, used by 21 of the 51 places in the table below, but it is not universal. Dates run from 31 July to 1 December, and four places set the date locally.
Kindergarten is also not compulsory everywhere. The Education Commission of the States (ECS) reports that only 17 states and Washington, DC require children to attend. Even so, 46 states plus DC require districts to offer at least half-day Kindergarten.
Kindergarten to 3rd grade rules: how many places have them?
Number of jurisdictions out of 51 (50 states plus Washington, DC)
Source: Education Commission of the States, 50-State Comparison: State K–3 Policies, published 15 September 2026. Counts include DC where ECS lists it.
Before you enrol your child, check these things:
- Your state’s cutoff date, and whether your district sets an earlier one.
- Whether your district allows early entry or a delayed start.
- Enrolment deadlines and the documents the school asks for, such as proof of age.
- Whether Kindergarten is half-day or full-day.
Children who are not quite ready can still build skills at home. These brain development activities for kids and these educational activities to do at home are good places to start.
Kindergarten Cutoff Dates by State (2026–2027)
The table shows the date by which a child must turn 5 to start Kindergarten in autumn 2026. It is based on state education rules as summarised by ECS and state education sources. Rules change and districts can differ, so confirm with your local school before you enrol.
| State | Child must turn 5 by | Local exceptions and notes |
|---|---|---|
| Alabama | 1 September | – |
| Alaska | 1 September | – |
| Arizona | 31 August | Must turn 5 before 1 September |
| Arkansas | 1 August | – |
| California | 1 September | Transitional Kindergarten for younger four-year-olds |
| Colorado | 1 October | Districts may set an earlier date |
| Connecticut | 1 September | Moved from 1 January in recent years |
| Delaware | 31 August | – |
| District of Columbia | 30 September | – |
| Florida | 1 September | – |
| Georgia | 1 September | – |
| Hawaii | 31 July | – |
| Idaho | 1 September | – |
| Illinois | 1 September | – |
| Indiana | 1 August | – |
| Iowa | 15 September | – |
| Kansas | 31 August | – |
| Kentucky | 1 August | – |
| Louisiana | 30 September | – |
| Maine | 15 October | Latest fixed statewide date |
| Maryland | 1 September | – |
| Massachusetts | Set by each district | Check your district |
| Michigan | 1 September | Waiver possible for children turning 5 by 1 December |
| Minnesota | 1 September | – |
| Mississippi | 1 September | – |
| Missouri | 1 August | – |
| Montana | 10 September | – |
| Nebraska | 31 July | – |
| Nevada | 1 August | Recently changed from 30 September; confirm with your district |
| New Hampshire | Set by each district | Check your district |
| New Jersey | 1 October | Districts may set an earlier date |
| New Mexico | 1 September | – |
| New York | 1 December | Districts set their own date; New York City uses 31 December |
| North Carolina | 31 August | – |
| North Dakota | 31 July | – |
| Ohio | First day of school | New for 2026–27; exact date depends on the district’s start date |
| Oklahoma | 1 September | – |
| Oregon | 1 September | – |
| Pennsylvania | Set by each district | Most districts use 1 September |
| Rhode Island | 1 September | – |
| South Carolina | 1 September | – |
| South Dakota | 1 September | – |
| Tennessee | 15 August | – |
| Texas | 1 September | – |
| Utah | 1 September | – |
| Vermont | 1 January | State default; districts may set an earlier date |
| Virginia | 30 September | – |
| Washington | 31 August | – |
| West Virginia | 31 August | Must turn 5 before 1 September |
| Wisconsin | 1 September | – |
| Wyoming | 15 September | – |
Kindergarten cutoff dates across the US
Number of places (50 states plus DC) in each cutoff group
Grouped from the table above. Dates in the 10 September to 15 October group include DC (30 September).
What Is Transitional Kindergarten (TK)?
Transitional Kindergarten, or TK, is a bridge year before Kindergarten for children aged about 4 to 5. It usually has a play-based approach and smaller steps than a full Kindergarten year. California first offered TK to children with late-autumn birthdays and has now opened it to all four-year-olds. Other states offer similar pre-K programmes under names such as 4K or VPK. Availability and age rules depend on the state and the district.
Can a 4-Year-Old Start Kindergarten?
In most places, no. A child who turns 5 after the cutoff normally has to wait. Some districts allow early entry after an assessment of reading readiness and social skills, but many leave this decision to the district. If your child just misses the date, contact the local school first. TK or Pre-K is often the easier route.
Why Are Kids in the Same Grade Different Ages?
Even in one classroom, ages can differ by a year or more. There are five main reasons.
Birthday and Kindergarten Cutoff Dates
With a 1 September cutoff, a child born on 31 August starts Kindergarten at 5, while a child born on 2 September waits and starts at nearly 6. Same year of birth, different class.
Delayed Kindergarten Entry (Academic Redshirting)
Redshirting means holding back an age-eligible child for a year, often because of a late birthday or because parents feel the child needs more time. It is less common than people think. Research from the University of Virginia and Stanford found that only around 4% to 5.5% of children are redshirted, although in some high-income communities nearly one in four children delay entry.
Grade Retention
A student may repeat a grade because of academic gaps. ECS reports that 17 states require third graders who miss reading benchmarks to be held back, with exemptions. A further 12 states and DC let local schools decide. A student who repeats a grade becomes older than most classmates.
Grade Skipping or Acceleration
Academically advanced students may move up a grade. Schools usually decide this after assessments and talking to parents. Skipping a grade makes a child younger than their classmates. Both skipping and repeating can affect friendships and confidence, so schools look at social and emotional readiness as well as marks.
Moving Between States or School Districts
Cutoff dates differ, so a child who moves can end up in a different grade from the one they left. A child who is one of the oldest in a 1 December cutoff state could be among the youngest in a 1 August state. The new school looks at age, previous records and local rules.
How to Calculate Your Child’s Grade Based on Their Birth Date
- Find your state’s Kindergarten cutoff date in the table above.
- Check whether your child turns 5 on or before that date in the year they would start.
- That autumn is their Kindergarten year.
- Add one grade for each school year after that.
- Confirm the placement with your local school district.
Here is an example with a 1 September cutoff:
| Date of birth | Turns 5 by the cutoff? | Starts Kindergarten | Starts 1st grade | Finishes 12th grade |
|---|---|---|---|---|
| 15 August 2020 | Yes (turns 5 on 15 August 2025) | Autumn 2025 | Autumn 2026 | Spring 2038 |
| 15 September 2020 | No (turns 5 two weeks after the cutoff) | Autumn 2026 | Autumn 2027 | Spring 2039 |
Missing the cutoff by two weeks moves the whole school journey back a full year. Retention, skipping or a delayed start would shift these dates again.
How Old Are Students When They Graduate High School?
Most US students graduate at 17 or 18. Grade 12 is the 17–18 year, and NCES says students normally finish it by age 18. Birthdays decide which age it is. With a 1 September cutoff, a child born in late August usually graduates at 17, while a child born in early September usually graduates at 18. A repeated year adds a year, and a skipped year takes one off. You can read more about how old seniors in high school are, and many families start planning a celebration early with these high school grad party ideas.
US Grade Levels Compared With Other Countries
Use this table for a rough match by age. These are approximate age equivalents, not guaranteed matches for curriculum or exams.
| Age at start of year | US | England and Wales | Canada | Australia | India |
|---|---|---|---|---|---|
| 4–5 | Pre-K / TK | Reception | Junior Kindergarten | Kindergarten / Preschool | Lower Kindergarten (LKG) |
| 5–6 | Kindergarten | Year 1 | Kindergarten | Foundation / Prep | Upper Kindergarten (UKG) |
| 6–7 | 1st grade | Year 2 | Grade 1 | Year 1 | Class 1 |
| 7–8 | 2nd grade | Year 3 | Grade 2 | Year 2 | Class 2 |
| 8–9 | 3rd grade | Year 4 | Grade 3 | Year 3 | Class 3 |
| 9–10 | 4th grade | Year 5 | Grade 4 | Year 4 | Class 4 |
| 10–11 | 5th grade | Year 6 | Grade 5 | Year 5 | Class 5 |
| 11–12 | 6th grade | Year 7 | Grade 6 | Year 6 | Class 6 |
| 12–13 | 7th grade | Year 8 | Grade 7 | Year 7 | Class 7 |
| 13–14 | 8th grade | Year 9 | Grade 8 | Year 8 | Class 8 |
| 14–15 | 9th grade | Year 10 | Grade 9 | Year 9 | Class 9 |
| 15–16 | 10th grade | Year 11 (GCSE year) | Grade 10 | Year 10 | Class 10 |
| 16–17 | 11th grade | Year 12 | Grade 11 | Year 11 | Class 11 |
| 17–18 | 12th grade | Year 13 | Grade 12 | Year 12 | Class 12 |
Reception in England is often compared with Kindergarten, but it is a year younger by age. In England, children must start school by the term after their fifth birthday, and most begin Reception in the September after turning 4 (GOV.UK). Canada and Australia also use different names and cutoff dates by province or state.
In Summary
Children are usually 5 to 6 in Kindergarten and 17 to 18 in 12th grade, with about one year of age for each grade in between. Birthdays, state cutoff dates, delayed starts, retention and skipping can all move a child up or down by a year. If you want to see more guides like this, browse our kids development and education section.
Related Post: What Age Do Children Start School in the UK? Your Simple Guide
Frequently Asked Questions About Age by Grade
How old are most Kindergarten students?
Most are 5 when the year starts and turn 6 during it, so the typical range is 5 to 6.
How old are first graders?
First graders are usually 6 to 7. Most are 6 on the first day of school.
How old are 8th graders?
Most 8th graders are 13 to 14. They are usually 13 in September and turn 14 during the year.
How old are high school freshmen?
Freshmen (9th grade) are usually 14 to 15.
How old are high school seniors?
Seniors (12th grade) are usually 17 to 18.
What grade is a 10-year-old in?
Grade 4 or 5. A child who was already 10 in September is usually in 5th grade. A child who turned 10 after the year began is usually in 4th grade.
What grade is a 13-year-old in?
Grade 7 or 8. Most 13-year-olds who were 13 at the start of the year are in 8th grade.
What grade is a 16-year-old in?
Grade 10 or 11. A child who was 16 at the start of the year is usually in 11th grade (junior year).
Can a 5-year-old be in first grade?
It is uncommon. Most 5-year-olds are in Kindergarten. It can happen in states with a late cutoff date, or if a district allows early entry or skipping after an assessment.
Can a child start Kindergarten at age 4?
Rarely. Some districts allow early entry after testing, but most children aged 4 join Pre-K or TK instead. Ask your local school district.
Is Kindergarten mandatory in every US state?
No. ECS reports that 17 states and Washington, DC require children to attend Kindergarten. In the other states it is optional.
Do all US schools follow the same grade structure?
No. Elementary can be K–5, K–6 or K–8. Middle school can be 6–8 or 7–8, and some districts have junior high for 7–9. High school is usually 9–12.
What is the difference between Kindergarten and Pre-K?
Pre-K is for children aged about 3 to 4, and is often optional. Kindergarten is for 5-year-olds and is the first year of elementary school in most districts.
Sources and How We Verified the Age-by-Grade Information
The age chart uses the standard US grade-age pattern, checked against the National Center for Education Statistics (NCES). Kindergarten policy figures come from the Education Commission of the States (ECS), and cutoff dates were compared with state education rules. Rules were last checked on 31 October 2026 and can change, so confirm with your school district.
- NCES: The Structure of American Education
- ECS: 50-State Comparison: State K–3 Policies (15 September 2026)
- GOV.UK: School starting age
- Your state department of education website, for the final cutoff date in your area