UK Key Stages vs US Grades
Side-by-side comparison, when-to-use-each guide, and instant conversion. Reviewed for 2026.
UK curriculum, UK educational materials, UK exam systems.
US/international curriculum, American resources, study-abroad comparisons.
| Aspect | UK Key Stages | US Grades |
|---|---|---|
| Reception | Year R (age 4-5) | Kindergarten (age 5-6) |
| Y1-2 (KS1) | Age 5-7 | Grades 1-2 |
| Y3-6 (KS2) | Age 7-11 | Grades 3-6 (Elementary) |
| Y7-9 (KS3) | Age 11-14 | Grades 7-9 (Middle / Jr High) |
| Y10-11 (KS4) | GCSEs, age 14-16 | Grades 10-11 |
| Y12-13 | A-levels, age 16-18 | Grade 12 + AP |
Frequently asked
Why do UK Years start 1 lower than US Grades?
UK Year 1 is roughly equivalent to US Grade 1 in age, but UK starts compulsory schooling at 4-5 (Reception, before Year 1). US Kindergarten serves the same role. The numbering looks different but the ages line up.
What's the equivalent of GCSEs?
There's no exact US equivalent. GCSEs are subject-by-subject final exams at age 16. The US 10th-grade PSAT is the closest analogue chronologically; the high school diploma (Grade 12 graduation) is the closest in completeness. SAT/ACT are taken in Grades 11-12, more like the A-level timing.
Frequently asked questions
Why do UK Years start 1 lower than US Grades?
UK Year 1 is roughly equivalent to US Grade 1 in age, but UK starts compulsory schooling at 4-5 (Reception, before Year 1). US Kindergarten serves the same role. The numbering looks different but the ages line up.
What's the equivalent of GCSEs?
There's no exact US equivalent. GCSEs are subject-by-subject final exams at age 16. The US 10th-grade PSAT is the closest analogue chronologically; the high school diploma (Grade 12 graduation) is the closest in completeness. SAT/ACT are taken in Grades 11-12, more like the A-level timing.