Grade Calculator: Final Grade Needed, Average and GPA

Two tools in one

Final grade needed: enter what’s been graded so far and what each part is worth, and it tells you the score you need on everything that’s left, usually the final exam.
Average and GPA: enter your classes with their grades and credit hours to get your weighted average, its letter grade and your GPA on a 4.0 scale.

What do I need on the final?

The formula is short:

needed = (target − points earned) ÷ weight remaining

Say homework is 20% of your grade and you have 92% on it, and the midterm is 30% and you got 78%. So far you’ve earned 92 × 0.20 + 78 × 0.30 = 41.8 points out of the 50 that have been graded. The final is the other 50%.

For an 80% (a B), you need 76.4% on the final.
For a 90% (an A), you need 96.4%.

If the result is above 100%, the target isn’t reachable with the final alone, and the calculator tells you so. That’s the moment to ask about extra credit or whether your lowest quiz can be dropped.

The letter grade scale

Percentage	Letter	Grade points
90–100	A	4
80–89	B	3
70–79	C	2
60–69	D	1
Below 60	F	0

This is the most common scale. Many schools also use plus and minus grades (an A− is often worth 3.7 points), so your official GPA may differ slightly from this one.

How GPA works

Your GPA doesn’t average your percentages: it averages the grade points of each letter, weighted by credit hours. Take three classes:

94% in a 3-credit class: an A, 4 points.
85% in a 4-credit class: a B, 3 points.
72% in a 3-credit class: a C, 2 points.

GPA = (4 × 3 + 3 × 4 + 2 × 3) ÷ 10 credits = 3.00. The weighted average of the percentages is 83.8%, also a B.

Because only the letter counts, an 89% and an 81% are worth exactly the same for your GPA: two B’s, 3.0 points each, even though their average is 85%. Those last few points before a cutoff are the ones that move your GPA.

What this calculator doesn’t do

It doesn’t round (89.5% counts as a B), doesn’t handle plus and minus grades, and doesn’t add the extra point some high schools give honors or AP classes in a weighted GPA. For any other percentage question, try the percentage calculator.

Frequently asked questions

How do I calculate what I need on my final?

Subtract the points you've already earned from the grade you want, then divide by the weight of the final. If homework (20% of the grade) is at 92% and the midterm (30%) at 78%, you've earned 41.8 points. For an 80% overall you need 38.2 more from a final worth 50%: 38.2 ÷ 0.5 = 76.4% on the final.

How do I calculate a weighted grade?

Multiply each score by its weight, add them up and divide by the total weight. With 92% on homework worth 20% and 78% on a midterm worth 30%, the weighted average so far is (92 × 20 + 78 × 30) ÷ 50 = 83.6%.

How is GPA calculated?

Each class gets grade points from its letter grade (A = 4, B = 3, C = 2, D = 1, F = 0), multiplied by its credit hours. Add them up and divide by total credits. An A in a 3-credit class, a B in a 4-credit class and a C in a 3-credit class give (12 + 12 + 6) ÷ 10 = a 3.00 GPA.

What percentage is an A?

On the most common scale, 90% and above is an A, 80–89 a B, 70–79 a C, 60–69 a D and below 60 an F. Many schools add plus and minus grades (an A− is often 90–92), and some use different cutoffs, so check your syllabus.

Does an 89.5% round up to an A?

It depends on your teacher or school; many round, some don't. This calculator doesn't round: it treats 89.5% as a B. If your class rounds up, you can set your target half a point lower.

Grade calculator: what you need on the final

Average grade