Simulates a class of percentage scores (0–100), then assigns grades under two systems:
UT A/AB/B/BC/C/CD/D/F and
Common +/-.
Inputs
Typical range: 10–200
Target average
Selected:
Standard deviation: percentage points
Change to reproduce different runs
Options
“High end” focus
Top % of students
Cutoffs (editable)
Enter minimum percentage for each grade. Tool assigns the highest grade whose minimum is met.
(So 60% → D, 59% → F.)
UT scale cutoffs
UT points: A 4.0, AB 3.5, B 3.0, BC 2.5, C 2.0, CD 1.5, D 1.0, F 0.0
+/- scale cutoffs
Common points: A 4.0, A- 3.7, B+ 3.3, …, D- 0.7
Tip: If you want “apples-to-apples” comparisons, set +/- cutoffs so that the boundary between
A and A- roughly aligns with the boundary between A and AB (and similarly for B/BC).
UT Scale Distribution
Plus/Minus Distribution
Where the GPA changes happen
Shows average (GPA under +/-) − (GPA under UT) by percentile bin of the simulated score distribution.
Positive bars mean the +/- system yields higher GPAs for that segment.