What grade is my child in by age?

Grade placement in the US is not purely age-based — it is determined by your child's birthday relative to your state's kindergarten cutoff date. Two children born the same year can be in different grades if one was born before the cutoff and the other after it.

Grade by age — US reference table (September 1 cutoff)

The table below assumes the most common US cutoff: September 1. If your state uses a different date, your child's grade may differ by one — use the calculator below with your state's exact cutoff.

Why the table shows single ages, not ranges

Most grade-by-age tables show ranges like "5–6 for kindergarten." That is correct over the course of a school year — a child who turns 5 in September starts kindergarten at age 5, but by the following May they are 6. The table above shows age at the start of the school year in September, which is more useful for answering "what grade is my child in right now?"

The one-year span in the "Notes" column (e.g., "typically 6 in the fall, turns 7 by spring") reflects that children move through that age during the school year, not that two different grades are possible. For ambiguous cases near a cutoff date, the calculator gives you the definitive answer.

What happens when a child's birthday is near the cutoff?

The cutoff date creates a sharp dividing line. In a September 1 state, two children born a single day apart — one on August 31, one on September 2 — end up in different school years and will be in different grades for their entire K–12 education. The August child starts kindergarten at 4 years and 11 months; the September child waits a full year and starts at 5 years and 11 months.

Research consistently shows that children born in the months just before the cutoff — the youngest in their class — are more likely to be diagnosed with ADHD, less likely to be identified as academically gifted, and are underrepresented in elite sports programs. This is known as the relative age effect and it persists well into adulthood. It does not mean holding a summer-born child back is always the right choice — but it is a real phenomenon worth understanding.

What grade should a 7-year-old be in?

A 7-year-old is almost always in Grade 1 or Grade 2. The split depends on their birthday:

• Born Jan–Aug (in a Sept 1 state): Started kindergarten at 5, so turned 7 during Grade 2. Currently Grade 2.
• Born Sept–Dec (in a Sept 1 state): Started kindergarten the following fall, so turned 7 during Grade 1. Currently Grade 1.
• If held back a year: Could be in Grade 1 even if born in spring. The calculator accounts for this via the custom cutoff override field.

What grade should a 10-year-old be in?

A 10-year-old is typically in Grade 4 or Grade 5. A child who turned 10 between January and August is in their Grade 5 school year (they are now 10 during a year when the class average is 10). A child who turned 10 between September and December is in Grade 4. Enter the exact birthday below for a precise answer.

Grades for a child born on February 29

Leap-day birthdays are handled by treating the birthday as March 1 in non-leap years for school eligibility purposes. This is the most common legal standard across US states. In practice it means a February 29 child almost always meets the typical September 1 cutoff and enters kindergarten in the same year as other children who turned 5 in early spring.

Use the calculator for a precise answer

The table above is a guide — the calculator below gives you the exact grade, current school year, and full K–12 timeline for any birthday in any state or country.