Grading systems

Standard A-F scale

Grade	Min %	Max %	GPA Points	Description
A	80	100	4.0	Excellent
B	70	79	3.0	Very Good
C	60	69	2.0	Good
D	50	59	1.0	Fair
E	40	49	0.5	Poor
F	0	39	0.0	Fail

Percentage scale

Some schools prefer to display raw percentages without letter grades. In this mode, the numeric mark is displayed directly on report cards.

GPA 4.0 scale

Used in tertiary institutions. The GPA is calculated as the weighted average of grade points:

GPA = Sum(Grade Points x Credit Hours) / Sum(Credit Hours)

Example:
  Mathematics (3 credits): A = 4.0 x 3 = 12.0
  English (3 credits):      B = 3.0 x 3 = 9.0
  Science (4 credits):      C = 2.0 x 4 = 8.0
  ─────────────────────────────────────────
  Total credits: 10
  Total points:  29.0
  GPA: 29.0 / 10 = 2.9

Custom scales

Decimal allows you to define completely custom grading scales with custom grade labels (e.g., Distinction, Merit, Pass, Fail), custom numeric boundaries, non-standard grade point values, and specific point ranges.