How GPA Works in Canada: A Complete Guide

June 4, 2026 · Editorial Team

Grade point average (GPA) is a single number that summarises your academic performance. In Canada there is no national GPA standard, so the way your GPA is calculated depends on which university you attend. This guide explains the underlying mechanics that every Canadian GPA shares, then walks through the main scales you will encounter.

What a GPA actually measures

Your GPA is a credit-weighted average of your grade points. Every course grade is converted to a numeric value (its grade points), multiplied by the course's credit weight, and added up. That total is divided by the sum of your credits. Courses worth more credits therefore influence your GPA more than smaller courses.

The formula is:

GPA = (Σ grade points × credits) ÷ (Σ credits)

A worked example

Suppose you take three courses on a 4.0 scale:

Total grade points = 12.0 + 9.9 + 3.0 = 24.9. Total credits = 3 + 3 + 1 = 7. GPA = 24.9 ÷ 7 = 3.56. Notice the 1-credit lab pulled the average down only slightly because it carries less weight.

Why Canadian scales differ

Unlike the United States, Canada never standardised a single GPA scale. Each institution sets its own. The most common systems are:

• 4.0 scale — the most widespread. Letter grades map to points where A is 4.0. At some schools (such as the University of Toronto) A+ and A both equal 4.0; at others A+ is worth more.
• 4.3 scale — used by schools like Queen's University, where A+ is worth 4.3, giving extra credit at the very top.
• 4.33 scale — a close cousin of the 4.3 system (A+ = 4.33), used at institutions such as Simon Fraser University.
• Percentage based — some universities, including Waterloo and Western, record course results as percentages and do not issue a 4.0 GPA at all. Students convert to a 4.0 equivalent only when an application requires it.
• 9.0 and 12.0 scales — used historically and in specific programs; less common today but you may still see them referenced.

Sessional, cumulative, and major GPA

You will often see more than one GPA on your record:

• Sessional / term GPA — the average for a single term.
• Cumulative GPA (CGPA) — the average across every applicable course you have taken.
• Major or program GPA — limited to courses in your discipline, used for some honours and graduate decisions.

Each is calculated with the same credit-weighted formula; only the set of courses included changes.

What does not count toward GPA

Most universities exclude pass/fail and credit/no-credit courses from the GPA calculation — they count toward graduation credits but carry no grade points. Withdrawn courses (a "W" notation) usually have no GPA effect either. Repeated courses are handled differently by each school: some replace the old grade, others average both attempts, so check your registrar's policy.

Converting between scales

There is no single accepted formula for converting a percentage to a 4.0 GPA, and converting between letter scales can shift your number slightly. For graduate and professional school applications, bodies like the Ontario Medical School Application Service (OMSAS) publish their own conversion tables, and receiving institutions often prefer to convert your original transcript themselves. The safest approach is to submit your transcript with its official grading legend and let the receiving school apply its own scale.

How to calculate your GPA

You can do it by hand with the formula above, but it is easy to make weighting mistakes. The calculators on this site are built for each university's exact scale: choose your school, enter your grades and credits, and the credit-weighted GPA is computed for you. For a quick estimate on a standard 4.0 scale, use the general calculator on the homepage.

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