Percentage and letter grade to GPA converter

What you can enter

• A percentage, with or without the % sign: 80, 80% or 89.6.
• A letter with an optional plus or minus: A, B+, C-. Lower case works too.
• A points score, written as points earned / points possible: 12/15, 43.5/50. A score above the total, such as 16/15 with extra credit, counts as more than 100%.

This page converts one grade at a time. To average several courses into a GPA, use the high school GPA calculator or the college GPA calculator. To score a test from the number of questions wrong, use the test grade calculator.

How the conversion works

A points score becomes a percentage first: points earned / points possible x 100. The converter keeps the exact fraction, so 2/3 is 66.666...% and never a rounded 66.67 when it picks a letter.

The percentage then becomes a letter on each scale. A grade belongs to the highest letter whose cutoff it reaches, with no rounding, so an 89.6 stays below a 90 line.

The letter then becomes points from that scale's letter table. Where a school publishes cutoffs but no points we could read, the cell says not stated rather than guessing.

A letter skips the percentage step. You see its points on each 4.0 table and the percent range it covers on each band scale.

A worked example: 12/15

12 / 15 x 100 = 80.00%. Where an A starts at 93 (Green Bay's cutoffs, the default here), a B- runs from 80 to 82, so 80% is a B-, worth 2.7 on the common plus/minus table. On North Carolina's 10-point scale, a B runs from 80 to 89, so the same 80% is a B, worth 3.0 on the plain scale.

The same 12 out of 15 is a C on North Carolina's old 7-point scale, where a C ran from 77 to 84. One quiz score can sit in three letters depending on the school.

Colleges use their own rules

Your school's scale builds your transcript, but a college may recalculate. The College Board says colleges may drop non-core courses, change honors and AP weighting or use their own scale. The University of California counts A as 4, B as 3, C as 2 and D as 1 and ignores pluses and minuses. Treat the result as your grade on each scale, not as the number an admissions office will use.

For the longer explanation, with a table of ten percentages on three scales and why you convert before you average, read the guide on converting percentages and letter grades to GPA.

The scales the converter uses

Each row in the result is one published percent scale. The letter comes from its cutoffs, with no rounding, so an 89.6 stays below a 90 line. The points come from a letter scale only where that scale cites the same school or district, or where our test examples pair the two. Alexandria and the old North Carolina 7-point scale publish cutoffs but no points we could read, so their points say not stated. Green Bay's own page lists thirds (a B- is 2.67), while the default here pairs its cutoffs with the more common 3.7 table, so a B- shows 2.7.