How to calculate your grade average
- 1.
Choose a mode
Grade average (any list of grades with weights), School report (several subjects, Polish 1-6 scale) or University (grades 2-5 with ECTS credits).
- 2.
Enter grades
Separate them with spaces: 5 4+ 3 6. Add a weight after a colon: 5:3 means grade 5 with weight 3. Grades without a weight use the default weight.
- 3.
Set pluses and minuses
Choose what a plus and a minus are worth: 0.5, 0.33 or 0.25. With 0.33 a “3+” equals 3.33 and a “4−” equals 3.67.
- 4.
Read the result
See the weighted average, the simple average, the sum of weights and a table showing the value and weight of each grade.
How to calculate a weighted average
Weighted average = sum of (grade × weight) ÷ sum of weights. A simple average is the special case where every weight equals 1.
Example: exam 6 (weight 3), quiz 5 (weight 2), oral answer 4+ (weight 1) and homework 3 (weight 1), with a plus worth 0.5:
(6·3 + 5·2 + 4.5·1 + 3·1) ÷ (3 + 2 + 1 + 1) = 35.5 ÷ 7 = 5.07.
The same grades without weights give a simple average of 4.63 - the heavily weighted exam pulls the result up. In the calculator, enter 6:3 5:2 4+:1 3:1. A grade with weight 0 is listed but does not affect the weighted average.
Grading scales around the world
| System | Scale | Weights |
|---|---|---|
| US / Canada GPA | A = 4.0, B = 3.0, C = 2.0, D = 1.0, F = 0 | credit hours |
| Percentages | 0-100%, often mapped to A-F (90+ = A, 80-89 = B…) | % of the final grade |
| Europe (ECTS) | national grade, weighted by ECTS credits | ECTS credits |
| Polish school | 1-6 (6 excellent, 2 lowest pass) | set by the teacher |
| Polish university | 2-5 in steps of 0.5 | ECTS credits |
The formula is the same everywhere. Percentage course grades work exactly like this too: quizzes 85% (20%), midterm 72% (30%) and final 90% (50%) give 0.2·85 + 0.3·72 + 0.5·90 = 83.6%. The calculator’s input accepts grades 1-6 (with + and −) and, in University mode, 2-5, so percentages need to be computed by hand with the formula above (the percentage calculator helps with the individual scores).
Calculating a GPA with this tool
US letter grades fit the Grade average mode: enter A as 4, B as 3, C as 2, D as 1 and use credit hours as weights. Set both plus and minus to 0.33 and you get the standard 4.0 scale: B+ = 3.33, A− = 3.67, C− = 1.67.
Example: A in a 3-credit course, B+ in a 4-credit course, C in a 3-credit course → 4:3 3+:4 2:3 → (12 + 13.33 + 6) ÷ 10 = 3.13.
Limitations: an F (0 points) cannot be entered, and the “suggested grade” refers to the 1-6 scale, so ignore it for GPA. To include an F, take the result and rescale it: GPA × credits without F ÷ all credits. With the example above plus a 3-credit F: 3.13 × 10 ÷ 13 = 2.41. Some schools also cap A+ at 4.0, while the calculator would count it as 4.33.
University (ECTS) and school report modes
The University mode accepts grades 2, 3, 3.5, 4, 4.5 and 5 (3+ = 3.5) and weights each one by its ECTS credits. Example: 5 (6 ECTS), 4.5 (4 ECTS) and 3 (2 ECTS) give (30 + 18 + 6) ÷ 12 = 4.50. Total credits are shown next to the result.
The School report mode follows Polish rules: list subjects, enter grades or a final grade for each, and the tool computes the report average. A certificate with distinction requires an average of at least 4.75 (not rounded - 4.74 is not enough) and at least “very good” conduct; the tool tells you how many points are missing.
Frequently asked questions
How do I calculate a weighted average?
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How do I calculate my GPA?
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What is the difference between a simple and a weighted average?
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How much is a plus or minus worth?
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How do I enter weights?
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How is the ECTS average calculated?
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Is the average rounded?
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