School age requirements by country
The age at which children begin formal education varies dramatically around the world — from 3 in France to 7 in Finland. Understanding how your home country's system compares to the US helps families relocating internationally, and illuminates why researchers continue to debate the "right" age to start school.
Quick reference: school starting age worldwide
| Country | Starting age | First year name | Cutoff / notes |
|---|---|---|---|
| United States | 5 | Kindergarten | Cutoff varies by state (July 31 – Jan 1); most use Sep 1 |
| United Kingdom (England) | 4 | Reception | August 31 cutoff; children start the September after turning 4 |
| United Kingdom (Scotland) | 4–5 | Primary 1 | February 28 cutoff; children born Mar–Aug start at almost 5.5 |
| Canada | 5 | Kindergarten / JK | Most provinces use Dec 31; Ontario has JK (age 4) and SK (age 5) |
| Australia | 4–5 | Prep / Foundation | Cutoff varies by state; Jan–Jul depending on state |
| Germany | 6 | Klasse 1 | Must turn 6 by June 30; Grundschule covers grades 1–4 |
| France | 3 | Maternelle (PS) | Compulsory from age 3 since 2019; 3-year kindergarten cycle |
| Japan | 6 | Ichi-nen-sei | Starts April after turning 6; Japan has April 2 fiscal cutoff |
| South Korea | 6 (Korean age 7) | Cho-deung-hak-gyo 1 | Koreans count age from birth year; most enter at Western age 6 |
| Finland | 7 | Grade 1 | World-famous late start; pre-primary at 6 is compulsory but play-based |
| Sweden | 7 | Förskoleklass / Grade 1 | Pre-school class (age 6) became compulsory in 2018 |
| India | 5–6 | Class 1 | Varies by state; Right to Education Act sets 6 as minimum for Grade 1 |
| Brazil | 6 | Fundamental I (1º ano) | Mandatory from age 6 since 2009; Pre-school from age 4 compulsory since 2016 |
| China | 6 | Xiaoxue Year 1 | Must turn 6 by Aug 31; 6-year primary school |
| New Zealand | 5 | Year 1 | Uniquely, children can start on their 5th birthday; Year 1 is not age-cohorted |
Why countries choose such different starting ages
The variation in school starting ages reflects deep cultural and policy differences, not just administrative convenience. Three broad philosophies drive most systems:
- Academic preparedness model (age 5–6). Most English-speaking countries and much of Asia fall here. Formal literacy and numeracy instruction begins early on the assumption that structured learning at age 5 builds a foundation for later achievement. The US, UK, Canada, Australia, and Japan all use this model.
- Play-based early childhood model (age 6–7). Scandinavian countries — particularly Finland — deliberately delay formal academic instruction. The evidence from Finland is striking: Finnish students typically outperform most early-starting countries on PISA assessments, despite (or because of) starting formal reading instruction at age 7. The argument is that play, social learning, and executive function development in early childhood produce better long-term outcomes.
- Universal early access model (age 3). France and some other countries make pre-school compulsory from age 3, but the focus in the early years is on social development, language, and play. Formal academics begin later. France's maternelle is more like extended kindergarten than primary school.
Country-specific notes for families who have moved internationally
Moving from the UK to the US
UK children start Reception at age 4, which puts them one full school year ahead of the US kindergarten start at 5. A UK child who completed Year 1 (equivalent to Grade 1 in the US) would typically be placed in Grade 2 in the US — but this is not automatic. US schools make placement decisions based on assessment, not just age or foreign grade completion. Expect a short reading and math evaluation.
UK Year groups align with US grades as follows: Reception = Pre-K/K transition, Year 1 = Grade 1, Year 2 = Grade 2, Year 6 = Grade 6, Year 9 = Grade 9, Year 11 = Grade 10 or 11 (GCSEs have no direct US equivalent), Year 13 (A-levels) = Grade 12.
Moving from Canada to the US
Canadian and US grade structures are nearly identical. The main complication is the December 31 cutoff used in most Canadian provinces versus the September 1 cutoff used by most US states. A child born in October who started kindergarten in Canada (they qualified under Dec 31) may technically be too young to have started in a US September 1 state — or they may have just barely qualified. US schools will generally respect the Canadian placement, but it is worth confirming with the enrollment office.
Moving from Australia to the US
Australian Prep/Foundation is equivalent to US kindergarten. Year 1 = Grade 1, and so on through Year 12 = Grade 12. The school year runs February through December in Australia (reversed from the US), so a mid-year move may result in a child who has completed half of one Australian year transitioning into either the start or middle of the corresponding US grade.
The relative age effect across countries
One consistent finding across every country studied is the relative age effect: children born just after the enrollment cutoff date — the oldest in their cohort — systematically outperform children born just before the cutoff (the youngest) across academic, athletic, and professional outcomes. This has been documented in the US, UK, Canada, Japan, Germany, and virtually every other country where researchers have looked.
Countries with later starting ages (Finland, Sweden) show a compressed relative age effect — smaller maturity differences at entry mean the within-cohort advantage is smaller. Countries with very early starting ages (England at 4) show the largest within-class age gaps.
For US families: the school age calculator shows your child's exact age relative to the typical class cutoff, which is useful context when thinking about whether your child is one of the younger or older members of their class.