British System

• International General Certificate of Secondary Education (IGCSE), or General Certificate of Secondary Education (GCSE), or General Certificate of Education Ordinary Level (GCE O Level)
• Grade results A*-C on 5 different subjects + transcript
• General Certificate of Education Advanced Level (GCE A Level) with grade results A*-E on at least 3 different subjects + transcript

IB Diploma

• International Baccalaureate Diploma Programme (IBDP) or;
• International Baccalaureate Diploma or;
• IB Diploma Course Results (IBCR) 
• With not less than grade 3 on at least 5 different subjects

Note: 

• Applicants must have completed or presently be enrolled in their final year of high school, or its equivalent levels according to the condition set by Chulalongkorn University
• Applicants must have graduated or currently be enrolled in their final year of high school (Mathayom 6 in Thai system), or its equivalent levels according to the criteria set by Chulalongkorn University, with a minimum GPAX of 2.75 and in high school level have taken course or proficiency test in Science subject.

Applicants must submit all of the following 3 required documents that all results must meet the requirements.

2.1 Applicants must submit one of the following English proficiency test scores:

• TOEFL (Paper-based) at least 550 or
• TOEFL (Internet-based)  at least 79
• IELTS Academic at least 6.0
• SAT (Evident-Based Reading and Writing) at least 450
• CU-AAT (Verbal Section) at least 400
• CU-TEP at least 80
  

2.2 Applicants must submit one of the following Mathematics test scores:

• CU-AAT (Math Section) at least 450
• SAT (Math) at least 500
• SAT II (Subject Test) (Math Level 2) at least 500

Selection criteria for admission are:

• English Proficiency Test Score 30%
• Mathematics Proficiency Test Score 30%
• Interview Score 40%