Letter Grade to GPA Converter

A GPA turns a set of letter grades into one number, and this tool does it in the letter-to-GPA direction. You start with letters you already have, such as A, B plus, and C, and the tool gives each one a point value, then averages them. That is different from a GPA calculator that starts from percentage scores, which first has to guess which letter each percentage means. Here, the letters are the input, and the points follow directly.

The standard 4.0 scale is the simplest. A is worth 4 points, B is worth 3, C is worth 2, D is worth 1, and F is worth 0. A plus or minus sign is ignored on this scale, so B plus counts as 3, just like a plain B. Many schools use this scale because it is easy to explain and easy to check, and it treats a whole letter band as one step, even though the top and bottom of the band feel different.

The plus and minus scale adds finer steps. A minus is 3.7, B plus is 3.3, B minus is 2.7, C plus is 2.3, and so on, with A plus capped at 4.0 on most scales. That finer scale rewards the difference between a strong B and a weak B, which the standard scale hides. It also means the same set of letters can give a different GPA on the two scales, so always say which scale you used when you quote a GPA.

Here is a worked example on both scales. The letters are A, B plus, A minus, C, and B. On the standard scale, the points are 4, 3, 4, 2, and 3, which sum to 16, and 16 divided by 5 is 3.20. On the plus and minus scale, the points are 4.0, 3.3, 3.7, 2.0, and 3.0, which sum to 16.0, and the average is also 3.20 in this case. Other sets will differ, so try both scales and compare.

Averaging is the whole calculation, and it is worth seeing plainly. Add the points for every grade, count how many grades there are, and divide the sum by the count. Every subject counts equally here, which is the unweighted GPA. Some schools use a weighted GPA, where harder courses add a bonus, such as 0.5 or 1.0 points, and those GPAs can rise above 4.0. This tool gives the unweighted result, so do not compare it directly with a weighted GPA.

Institutions vary, and that is the biggest caveat. One school may treat A plus as 4.3, another may cap it at 4.0, and another may not use plus and minus at all. Some countries use entirely different grade letters or numbers. Before you use a GPA for an application, check the scale of the school that issued the grades, and the scale of the school that will read them. A GPA without its scale is a number without a meaning.

Invalid letters are skipped, not guessed. If you type a letter the scale does not know, such as E or a typo, the tool leaves it out and counts only the grades it recognises. Check the count shown beside the result: if you entered 6 letters but only 5 were counted, one entry needs fixing. That check prevents a silent error from changing your average without you noticing.

You can use this tool in several ways. Check a term GPA from a report card, compare the standard and plus-minus results for the same letters, or see what GPA you need by testing what happens if one grade rises a step. It is a planning and checking aid, not an official transcript, and the school record is always the final word. In short, it turns letters into points, honestly and with the scale stated.

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