Below you will find a table of ages and grade levels of Primary students at Odense International School compared with the Danish school system, the UK, Australia, and the USA.
Please note that all placement decisions are determined in the weeks after a student's arrival and are subjected to observation by the teaching team.
| Age in Years | Odense International School | Danish School System | United Kingdom | Australia & USA |
| 4–5 | Preschool | Børnehave | Reception | Pre-School & Pre-K |
| 5–6 | Primary 1 | Forårs SFO/0. klasse | Year 1 | Kindergarten |
| 6–7 | Primary 2 | 1. klasse | Year 2 | Year 1 & 1st Grade |
| 7–8 | Primary 3 | 2. klasse | Year 3 | Year 2 & 2nd Grade |
| 8–9 | Primary 4 | 3. klasse | Year 4 | Year 3 & 3rd Grade |
| 9–10 | Primary 5 | 4. klasse | Year 5 | Year 4 & 4th Grade |
| 10–11 | Primary 6 | 5. klasse | Year 6 | Year 5 & 5th Grade |
| 11–12 | Secondary 7 | 6. klasse | Year 7 | Year 6 & 6th Grade |
| 12–13 | Secondary 8 | 7. klasse | Year 8 | Year 7 & 7th Grade |
| 13–14 | Secondary 9 | 8. klasse | Year 9 | Year 8 & 8th Grade |
| 14–15 | Secondary 10 | 9. klasse | Year 10 | Year 9 & 9th Grade |
| 15–16 | Secondary 11 | 10. klasse | Year 11 | Year 10 & 10th Grade |