What is HMChO?

Founded by students from Harvard and MIT, HMChO was created with the vision of inspiring high school students worldwide to deepen their passion for chemistry. Our goals:

Engage a diverse community of students
Support students in reaching beyond school curriculums;
Prepare students for examinations like the U.S. National Chemistry Olympiad
Provide students with an enriching environment meant to deepen their understanding of chemistry

Exam Format

The Olympiad follows a format modeled after the U.S. National Chemistry Olympiad (USNCO) in order to ensure a rigorous assessment of students across the multiple areas of chemistry. It will run virtually in the 2025 competition.

The exam will be split into two parts as follows with a break between them:

Part I: 90 minutes for 60 multiple-choice questions;

Part II: 105 minutes for 8 written-response problems;

Scoring Formula: Total Score = 1.25 × Part I Score + Part II Score.

Eligibility

HMChO is open to all high school students (equivalents of U.S. grades 9-12) with all students participating in the same division. While the Olympiad primarily targets students in the United States, international students are welcome to participate.

Registration is now closed!

HMChO 2025 Schedule

Tournament Date: Saturday, March 8th, 2025

Check-in Time: 9:30 AM EST

Part I Exam (Multiple Choice): 10:50 AM - 12:20 AM EST

Break: 12:20 AM - 12:50 PM EST

Part II Exam (Free Response): 12:50 PM - 2:35 PM EST

Part II Exam Upload Period: 2:35 PM - 2:50 PM EST

The awards ceremony will tentatively take place one week after the competition.

Complete information can be found on the HMChO Information page.

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