It turns a list of courses into a grade point average the way universities that use credits do it. For every course you enter the number of credits and either a mark out of 10 or a letter grade. The calculator rounds the mark to one decimal, turns it into a letter, turns the letter into points on the 4.0 scale and then weights every course by its credits. You get the GPA on the 4.0 scale, the plain credit-weighted average on the 10-point scale, the number of credits counted and the classification band. Add the GPA and credits from your transcript to get the cumulative GPA, and a target to see the average you still need.
The conversion table under the tool always shows the scheme you picked, so you can check any row by hand.
How the numbers are calculated
The example in the tool has four courses: 8.6 (3 credits), 7.5 (4), 6.8 (2) and 8.2 (3). With plus grades they become A = 4.0, B = 3.0, C+ = 2.5 and B+ = 3.5. The weighted sum is 3 × 4.0 + 4 × 3.0 + 2 × 2.5 + 3 × 3.5 = 39.5 over 12 credits, so the GPA is 3.2917, shown as 3.29. The 10-point average uses the marks themselves: (3 × 8.6 + 4 × 7.5 + 2 × 6.8 + 3 × 8.2) / 12 = 94 / 12 = 7.83.
Notice what the letters do: on the 10-point scale this student is in the "good" band (7.0 to under 8.0), yet on the 4.0 scale 3.29 falls in "very good" (3.2 to under 3.6). The letter steps are coarse, so a conversion is never a simple formula. The same marks under the letters-only scheme give 3.08, because 8.2 becomes a plain B instead of B+. The article on converting between the 10-point and 4.0 scales walks through this in detail.
All arithmetic is exact. Marks are kept in tenths and credits in hundredths as whole numbers, and only the final GPA is rounded, half up, to two decimals. The classification uses that rounded value, as transcripts do. For a target, the needed average is rounded up, so reaching it is always enough.
Tips and common mistakes
- Do not convert the average. Converting a 7.83 average with a formula gives a different, wrong 4.0 GPA. Each course is converted separately, then averaged.
- Round the mark first. 8.45 is rounded to 8.5 and becomes an A; 8.44 stays a B+. Enter marks the way your transcript prints them.
- F still counts. A failed course carries its credits with zero points until it is retaken; most schools then replace the old grade, so enter only the new one.
- Letters have no 10-point mark. If you enter some courses as letters, the 10-point average is not shown rather than guessed.
- Check your school. Some universities use other cut-offs, A+ grades or a different rounding rule. The calculator follows the common scheme; treat the result as a check, not an official record.
For percentages of a total, use the percentage calculator.
