Ontario University Admission GPA Calculator (OUAC Scale)

🎓 Ontario University Admission GPA Calculator

Use this tool to estimate your **Admission Average** for Ontario universities (UofT, Waterloo, McMaster, etc.) based on the **OUAC 4.0 GPA Scale**. Enter your final high school grades to see your overall GPA, your required **"Top 6"** average, and how your results compare to common admission thresholds. Grades are automatically converted to the official OUAC scale.

Repeated Course Handling Policy: Keep Highest Grade (Default) Replace Mark (Second attempt replaces first) Count All Attempts (Less common, reduces average) This selection may affect your calculated average if you have repeated courses.

Course Name	Code	Grade (%)	Type (U/M/C)	Credit Weight	Semester	Action

Calculation Results

Overall OUAC GPA (All Courses)

N/A

Best 6 Admission Average (%)

N/A

Based on **Top 6 U/M** courses only.

Notes & Top 6 Selection

Course Conversion Summary

Course Name (Grade)	Type / Weight	OUAC GPA	Included in Top 6?

Understanding the OUAC GPA and Admission Average

The Ontario Universities’ Application Centre (OUAC) does not calculate a single, universal GPA in the traditional 4.0 scale for admissions. Instead, they facilitate the transmission of your high school percentage grades. However, many admission offices, especially those dealing with international or highly competitive applicants, internally map these percentages to a 4.0 scale for quick comparison, or simply rely on the percentage average of your top six eligible courses.

How to use the calculator

To get an accurate result, enter your final or midterm percentage grade for each of your Grade 12 courses. Use 'U' or 'M' for university-level or mixed-level courses, as only these count toward the 'Top 6' admission average. The calculator will automatically identify your best six U/M courses, convert your percentage grades to the OUAC 4.0 scale, and present both your percentage average and your OUAC GPA.

The Calculation Formula and OUAC Scale

The OUAC 4.0 scale is a standardized conversion, though universities may use slight variations. This calculator uses the most common scale:

• 90–100% = 4.0
• 85–89% = 3.9
• 80–84% = 3.7
• 75–79% = 3.3
• 70–74% = 3.0
• 65–69% = 2.7
• 60–64% = 2.3
• 55–59% = 2.0
• 50–54% = 1.0
• <50% = 0.0

The Best 6 Admission Average is simply the sum of the percentage grades of your six highest U/M courses, divided by six. The Overall OUAC GPA is the sum of the OUAC GPA scores for all courses (weighted by credit value, default 1.0) divided by the total credits.

Importance of these calculations

Your "Top Six" average is the most critical number for competitive programs in Ontario. It provides universities with a standardized way to assess your academic performance across your best courses. Achieving a high percentage average (typically 85%+) is essential for consideration in high-demand fields like Engineering, Computer Science, and Business.

Frequently Asked Questions (FAQ)

What is the difference between Overall GPA and Best 6 Average?

The **Overall GPA** is the average of *all* courses you entered, converted to the 4.0 OUAC scale. The **Best 6 Average** is the calculated percentage average of only your six highest U or M level courses, which is the primary metric used by Ontario universities for admission decisions.

Which courses count towards the "Top 6" average?

Only Grade 12 courses designated as **University ('U')** or **Mixed ('M')** level are eligible. College ('C') level courses are generally excluded from the calculation of the admission average for university programs.

How are repeated courses handled?

The default policy for most Ontario universities is to take the **highest grade achieved** in a repeated course for the Top 6 calculation. However, some highly competitive programs (like at UofT or Waterloo) may scrutinize repeated courses or, in rare cases, use the average of attempts. Our calculator allows you to select your preferred policy.

Is this calculator officially endorsed by OUAC?

No, this is an independent, non-official tool designed to help students estimate their admission metrics based on the publicly understood OUAC conversion scale and university admission practices. Official admission calculations are performed by the universities themselves.

Can I use a letter grade (e.g., A+) instead of a percentage?

The calculator is designed for percentage grades (0-100), as this is the standard reported format in Ontario high schools and required by OUAC. You must convert any letter grades to their corresponding percentage equivalent before entering them into the calculator.