What is the Western University grading scale?

Western's undergraduate scale is: A+ = 90–100%, A = 80–89%, B = 70–79%, C = 60–69%, D = 50–59%, and F = below 50%. The minimum passing grade is D (50%).

Western University Average & GPA Calculator – Official Scale

Q: Does Western University use a GPA?

No. Western University (UWO) uses a numeric percentage grading scale and does not issue a grade point or cumulative GPA on transcripts or in letters. Your standing is reported as a percentage average. A 4.0 GPA is only produced when you apply to programs (such as medical or graduate school) that convert your marks using the OMSAS Undergraduate Grade Conversion Table.

Q: How do I convert my Western average to a 4.0 GPA?

Use the OMSAS percentage conversion: 90–100 = 4.0, 85–89 = 3.9, 80–84 = 3.7, 77–79 = 3.3, 73–76 = 3.0, 70–72 = 2.7, 67–69 = 2.3, 63–66 = 2.0, 60–62 = 1.7, 57–59 = 1.3, 53–56 = 1.0, 50–52 = 0.7, below 50 = 0.0. OMSAS converts each course individually and then takes the credit-weighted average — not the other way around.

Q: How does Western treat failing marks in an average?

Per Western's official policy, all marks below 50% are failures and are included in average calculations. Failing marks below 40% are counted as 40%, and marks from 40% to 49% are counted as the actual mark reported.

Tool 1

Western Weighted Average Calculator

Add each course with its final percentage and course weight (e.g. 1.0 or 0.5). You get both your percentage average and your OMSAS 4.0 cGPA.

Add Your Courses

Western reports a percentage average. Course weights are usually 1.0 (full) or 0.5 (half).

Course / Subject

Final Mark (%)

Course Weight

Course	Mark (%)	Weight	Actions

Convert a single mark →

How to use the CGPA Calculator

Enter your semester name or number (e.g. Semester 1, 1st, First).
Enter the SGPA for that semester.
Enter the total credits earned in that semester.
Click “Add Semester”, then repeat for every completed semester.
Click “Calculate CGPA” to see your cumulative result.

Although CGPA is normally awarded at the end of the programme, you can use this tool any time to see your current or running CGPA based on the semesters you've completed so far.

The Math

How a Western Average Is Calculated

Western uses a credit-weighted average of your percentage marks.

Western Average Formula

\[ \text{Average} = \frac{\displaystyle\sum (\text{Mark}\% \times \text{Weight})}{\displaystyle\sum \text{Weight}} \]

Mark %Final percentage earned in the course

WeightCourse weight (full = 1.0, half = 0.5)

📝 Worked Example

A student completes five courses:

Course	Mark (%)	Weight	Mark × Weight
Course 1	88	1.0	88 × 1.0 = 88.0
Course 2	76	1.0	76 × 1.0 = 76.0
Course 3	91	0.5	91 × 0.5 = 45.5
Course 4	69	1.0	69 × 1.0 = 69.0
Course 5	82	0.5	82 × 0.5 = 41.0
Total	—	4.0	319.5

Plugging into the formula:

\[ \text{Average} = \frac{319.5}{4.0} \approx \mathbf{79.9\%} \]

79.9% falls in Western's B band and converts to roughly 3.3 on the OMSAS 4.0 scale.

Tool 2

Western Percentage → 4.0 GPA Converter

Convert a single Western percentage mark to its OMSAS 4.0-scale value — the conversion Western directs students to for medical, graduate and professional school applications.

Convert Percentage → GPA

Enter any Western percentage between 0 and 100.

Your Western Percentage

⚠ Convert First, Then Average

OMSAS does not convert your overall average. It converts each course to a 4.0 value individually, then takes the credit-weighted mean of those values. Tool 1 above does this automatically — averaging your percentage and then converting it can produce a different (often inflated) GPA.

Reference

Official Western Grading Scale

Undergraduate percentage scale and the OMSAS 4.0 conversion, sourced from Western's Academic Handbook and OUAC.

📘 Western Undergraduate Percentage Scale

Applies across Arts & Humanities, Science, Engineering, Health Sciences, Social Science, Business and the Affiliated Colleges.

Marks Range	Letter Grade	Performance
90 – 100%	A+	One could scarcely expect better at this level
80 – 89%	A	Superior work, clearly above average
70 – 79%	B	Good work, eminently satisfactory
60 – 69%	C	Competent work, meeting requirements
50 – 59%	D	Fair work, minimally acceptable
below 50%	F	Fail

Note: All marks below 50% are failures and are included in average calculations. Failing marks below 40% are counted as 40%; marks from 40–49% are counted as the actual mark. Western does not issue a GPA — your standing is a percentage average.

🎓 Western Percentage → OMSAS 4.0 Scale

Used for medical, graduate and professional school applications (OMSAS / OUAC).

Percentage	OMSAS Value
90 – 100	4.0
85 – 89	3.9
80 – 84	3.7
77 – 79	3.3
73 – 76	3.0
70 – 72	2.7
67 – 69	2.3
63 – 66	2.0
60 – 62	1.7
57 – 59	1.3
53 – 56	1.0
50 – 52	0.7
below 50	0.0

Note: Each medical school may compute a slightly different GPA from the same transcript. Always confirm current values on the OUAC OMSAS website before applying.

Got Questions?

Western University Grades — Frequently Asked Questions

Does Western University use a GPA?

No. Western (UWO) uses a numeric percentage scale and does not issue a grade point or cumulative GPA — not on transcripts and not in letters.

A 4.0 GPA only appears when an application service (like OMSAS) converts your marks for you.

What is the Western grading scale?

A+ = 90–100% · A = 80–89% · B = 70–79% · C = 60–69% · D = 50–59% · F = below 50%.

The minimum passing grade is D (50%).

How do I convert my Western average to a 4.0 GPA?

Use the OMSAS table: 90–100 → 4.0, 85–89 → 3.9, 80–84 → 3.7, 77–79 → 3.3, 73–76 → 3.0, 70–72 → 2.7, and so on down to below 50 → 0.0.

Important: convert each course first, then take the weighted average. Tool 1 above handles this for you.

How are failing marks counted in my average?

Marks below 50% are failures and are included in averages. A failing mark below 40% is counted as 40%; a mark of 40–49% is counted as the actual mark reported.

Is this calculator official?

It uses Western's official percentage scale and the OMSAS conversion table, but it is a planning tool only. Your official record always comes from the Western Office of the Registrar.

Reference: Grading data verified against the Western University Office of the Registrar and the OUAC OMSAS Undergraduate Grade Conversion Table.