What do I need to pass?
"Passing" is not one number. Depending on the system grading you, the line sits at 60, 65, or 70 — and because a final exam only controls its weight's share of the course, each five-point difference in the line moves the score you need on a 20%-weight final by twenty-five points. Knowing which line applies to you is worth more than any amount of studying aimed at the wrong one.
Three real lines, three real sources
The common US college convention puts the lowest passing grade at a D− near 60 — the standard 4.0 ladder published by university registrars, such as the University of Missouri's, runs D− at 0.7 grade points, still credit-earning. New York's Regents system sets its line at 65: the state's diploma requirements have students score 65 or above on each required Regents examination. And Texas sets the highest of the three: under 19 TAC §74.26, credit for a high school course "may be earned only if the student received a grade which is the equivalent of 70 on a scale of 100." Same country, three passing lines, five points apart each.
The ladder at a 20% final
Needed final-exam score by current grade and passing line, using needed = (target − current × 0.8) ÷ 0.2:
| Current grade | Pass at 60 | Pass at 65 | Pass at 70 |
|---|---|---|---|
| 55 | 80 | 105 | 130 |
| 65 | 40 | 65 | 90 |
| 75 | 0 | 25 | 50 |
Read one row end to end and the twenty-five-point swings are the whole story. A student at 55 needs an 80 to clear a 60 line — hard but real — while the same student under a 70 line needs a 130, which is not a study plan. A student at 65 is comfortable against the 60 line (a 40 does it), on a knife edge against 65 (needs exactly a 65 — hold your average), and in serious trouble against 70 (needs a 90). And the 75 row shows the pleasant edge case: against a 60 line the needed score is exactly 0 — the pass is banked to the decimal, though walking out of the final is still a bad idea anywhere attendance or completion rules exist.
The entry tickets run the same way: at a 20% final, a pass stays possible (needed ≤ 100) from a current grade of 50 against the 60 line, 56.25 against 65, and 62.5 against 70.
Passing is not the same as counting
One more distinction worth five minutes before finals week: at many colleges a D passes the course and earns the credit hours, but does not satisfy every requirement the course sits in. Marquette University's bulletin says it directly: courses completed with a grade of C−, D+ or D "do not count toward the total hour requirement for a major or minor" but "do count toward the total 120 credit hours required for graduation." A D can simultaneously pass, count toward graduation, and force a retake for the major. Whether your program has such a floor is in the bulletin, not in any calculator — and the GPA cost of the D itself is visible in the letter-to-GPA converter: a D is 1.0 on the standard ladder, a full three points under an A, which the cumulative GPA calculator will show rippling through your average for semesters. If your school offers a pass/fail option instead, the pass/fail impact calculator prices that trade before you make it.
Run your own numbers
Your final's weight is probably not exactly 20%, and your current grade is not a round number. The final grade calculator takes your actual three inputs and answers with the same honest states this page uses — including "already secured" and "not reachable" when the arithmetic says so. If what remains of your course is more than one final — a few assignments, a project, an exam — the grade needed calculator is the general version: it prices the average you need across everything left. And if you are aiming higher than the line, the companion guide — what do I need to get an A? — runs the same grid against the 93 and 90 cutoffs.