The worst grade you can receive in school is an F, which stands for “fail” and typically covers any score below 60%. An F carries zero grade points, meaning it drags your GPA down without giving you any credit for the course. Whether you’re in middle school, high school, or college, an F signals that you did not meet the minimum standards to pass.
What an F Actually Means
On the standard letter grading scale used across most American schools, grades run from A (excellent) down through B, C, D, and finally F. The F grade generally applies to any final percentage of 59% or below. Unlike the other letters, there is no F+ or F-. It’s a single category that covers everything from a 59% down to a zero.
An F earns 0.0 grade points per credit hour. To put that in perspective, even a D, the next grade up, earns 1.0 grade point per credit hour. So a single F in a three-credit course doesn’t just give you nothing; it dilutes the points you’ve earned in every other class when your GPA is calculated. If you’re carrying a 3.0 GPA across four courses and fail a fifth, your overall GPA drops significantly because those zero points get averaged in with the rest.
Is a D Any Better?
A D is technically a passing grade in most schools, but just barely. It typically represents a score between 60% and 69%. In college, a D usually satisfies general credit requirements, meaning the course counts toward your total credits. However, many programs require a C or higher in courses related to your major or in prerequisite classes that feed into more advanced coursework. A D in those situations may force you to retake the course anyway.
Even when a D technically “passes,” it can create problems. Some schools require a minimum cumulative GPA of 2.0 to graduate, and stacking up D grades (worth just 1.0 points each) makes it hard to stay above that threshold. If you plan to take higher-level courses in the same subject, a D suggests you didn’t learn enough of the material to succeed at the next level.
Grades That Don’t Show Up the Same Way
Not every bad outcome on a transcript works like an F. Two common marks worth understanding are the W (withdrawal) and the I (incomplete).
- W (Withdrawal): You dropped the course after a certain deadline but before the end of the term. A W appears on your transcript but carries no grade points and is not factored into your GPA. It’s far less damaging than an F, though a pattern of W’s can raise questions on applications.
- I (Incomplete): Your instructor granted extra time to finish coursework, usually because of illness or an emergency. An incomplete also stays out of your GPA calculation, but if you don’t complete the work within the school’s deadline, it often converts to an F automatically.
Because neither a W nor an I counts toward your GPA, they are not “grades” in the traditional sense. When people ask about the worst grade, they mean the worst mark that actually factors into academic standing, and that’s the F.
How Other Countries Handle It
The letter F is a distinctly American convention, but other grading systems have their own equivalent. In the United Kingdom, the lowest mark at the GCSE level is a U, which stands for “ungraded” and corresponds directly to an F in the US system with a 0.0 GPA equivalent. At the A-level and university level, UK students can receive a “Fail” classification for scores roughly below 30% to 50% depending on the degree level. The practical effect is the same: no credit earned, and a significant hit to academic standing.
Some American schools use an E instead of an F for their failing grade. The meaning is identical. Whether the transcript reads E or F, it represents zero grade points and no course credit. The College Board treats both E and F grades the same way when calculating GPA for academic records.
What Happens After an F
An F doesn’t have to be permanent. Most schools allow you to retake a failed course. Policies vary on how the retake affects your record. Some schools replace the original F with the new grade in your GPA calculation, while others average the two together. Either way, the F typically still appears on your transcript even if it no longer counts toward your GPA.
In high school, failing a required course usually means you need to make it up through summer school, an extra semester, or credit recovery programs before you can graduate. In college, a failed course simply doesn’t count toward your degree requirements, so you’ll need to pass it (or an approved substitute) to move forward. The credit hours from the failed course still count as “attempted” hours, which can affect financial aid eligibility if your completion rate drops too low.
If you’re staring at a potential F and still have time in the semester, withdrawing with a W is almost always less damaging to your academic record. Check your school’s withdrawal deadline and talk to your instructor about where you stand before that date passes.