In short. A UK school “Year” is set by age on 1 September. Year 7 is ages 11–12, Year 9 is 13–14, Year 11 (GCSE) is 15–16, and Year 13 (final A-level year) is 17–18. US Grade is roughly UK Year minus one. So a US 8th-grader (age 13–14) maps to UK Year 9, the year most senior boarding schools take pupils in.
A mother in Lagos is looking at a UK school website at eleven at night. It says the main entry point is Year 9. Her daughter is in JSS 3. She has no idea whether those are the same thing, and the website assumes she was born knowing. This guide is the answer she needed.
UK year groups run by age, fixed to the school year that starts in September. Work out your child’s age on 1 September and the rest follows.
| UK Year | Age on 1 Sept | US Grade | Stage | Key exams |
| Year 7 | 11–12 | Grade 6 | Start of senior school (11+ entry) | — |
| Year 8 | 12–13 | Grade 7 | — | — |
| Year 9 | 13–14 | Grade 8 | Main boarding entry (13+ / Common Entrance) | — |
| Year 10 | 14–15 | Grade 9 | GCSE courses begin | — |
| Year 11 | 15–16 | Grade 10 | — | GCSE |
| Year 12 | 16–17 | Grade 11 | Sixth form begins (16+ entry) | AS |
| Year 13 | 17–18 | Grade 12 | Final school year | A-level / IB |
Two rules of thumb do most of the work. US Grade is usually UK Year minus one. And the three doors into a UK boarding school are 11+ (Year 7), 13+ (Year 9), and 16+ (Year 12, for sixth form). Most senior boarding schools fill mainly at 13+, so Year 9 is the year to aim at if your child is around thirteen.
Other systems line up against age, not against a grade number. An IB or international school will state the child’s age group. A child turning 14 during the school year is a Year 9 child in the UK, whatever the local label says. If your system runs on a different cut-off month, and several do, a child born in late summer can sit on the border of two UK years. That single fact changes which entry exam a school will ask for, so it is worth confirming with the admissions office rather than guessing.
The opinion worth stating: do not try to “advance” a child a year to look ahead. UK schools place on age and readiness, and a child who is young for the year in a demanding boarding house is a child under quiet strain. Fit beats acceleration.
One translated year group is a small thing. It is also the first moment a family from outside the UK stops feeling locked out of the system, and starts feeling able to choose inside it.