Grade D sits at 63 to 66 percent on the standard US grading scale and equals a 1.0 GPA on the 4.0 scale. It is one of the D-tier letters in the A-through-F sequence used at most US colleges and high schools, and counts as below average academic standing on most transcripts. A D grade earns elective credit at most US colleges but rarely satisfies a major prerequisite, where the floor is typically C or C+.
What Grade D Means on the Standard US Grading Scale
On the standard US grading scale used at most colleges and public high schools, grade D covers 63 to 66 percent and converts to a 1.0 grade-point value when the transcript is summarized on the 4.0 GPA scale. D is the middle D tier. It passes the course but sits below the 2.0 academic good standing minimum and may trigger probation if the cumulative GPA falls below it.
Some US institutions adjust the percentage cutoffs by a few points: a school might publish an A floor of 90 instead of 93, or run a 7-point band for plus and minus tiers rather than the standard 3-point modifier shift. The 4.0 GPA value tied to grade D is more consistent across schools than the percentage range, so it's worth verifying the specific cutoff with the registrar's published grading policy before relying on either reading.
How Grade D Compares to Adjacent Letters
The plus and minus modifiers split each letter tier into three sub-bands worth 0.3 GPA points each. The table below shows how grade D sits relative to the letter directly above and below on the standard scale, with percentage range and 4.0 GPA value for each.
| Letter | Percentage | 4.0 GPA | Standing |
|---|---|---|---|
| D+ | 67-69% | 1.3 | Below average |
| D | 63-66% | 1.0 | Below average |
| D- | 60-62% | 0.7 | Below average |
What GPA Is A D on the 4.0 Scale?
A D grade is worth 1.0 grade points on the standard 4.0 GPA scale used at most US colleges and high schools. A D grade earns elective credit at most US colleges but rarely satisfies a major prerequisite, where the floor is typically C or C+. On a credit-weighted transcript, every D grade multiplies its course's credit hours by 1.0 to produce that course's contribution to the cumulative GPA total.
The arithmetic stays the same regardless of the course load: a D in a 3-credit class contributes 3.0 quality points; the same D in a 4-credit class contributes 4.0 quality points. Use the GPA calculator to model how a transcript with multiple D grades and other letters resolves to a final cumulative GPA on the 4.0 scale.
Browse All Letter Grades on the US Scale
The US grading scale has 13 standard letters from A+ to F, plus two special variants (E historical, F- atypical). Use the chips below to jump to any letter's reference page, or see the full grading scale for all letters in one comparison table.
- Grade A+
- Grade A
- Grade A-
- Grade B+
- Grade B
- Grade B-
- Grade C+
- Grade C
- Grade C-
- Grade D+
- Grade D
- Grade D-
- Grade F
- Grade E
- Grade F-
Last verified: 2026-05-09. Sources: AACRAO transcript standards, NCES grade-distribution data, and the Mount Holyoke College historical record of the 1887 letter-grade adoption. Always verify the specific cutoff and GPA value with your school's registrar; institutional grading policies vary.