Equivalence Chart

  • AGEAMERICAN SYSTEMTHAI SYSTEMBRITISH SYSTEMCATEGORY
    9 YearsGrade 4Prathom 4Year 5Category 1
    10 YearsGrade 5Prathom 5Year 6
    11 YearsGrade 6Prathom 6Year 7Category 2
    12 YearsGrade 7Matthayom 1Year 8
    13 YearsGrade 8Matthayom 2Year 9Category 3
    14 YearsGrade 9Matthayom 3Year 10
    15 YearsGrade 10Matthayom 4Year 11Category 4
    16 YearsGrade 11Matthayom 5Year 12