Home›Calculators›Grade Calculator

Grade Calculator

This grade calculator tracks your weighted class grade from every assignment score and its weight, and the result updates live as you type. When exams get close, the final grade planner tells you the exact score you need on the final to reach your target, or warns you when the target is out of reach.

Built & reviewed by the TurboTeamTools team · Updated September 2026 · 0 uses on this device

Grade Calculator tool

Weighted grade

AssignmentGrade (%)Weight (%)
Current weighted grade
–

What do I need on the final?

You need
–

How to use it

  1. Enter each assignment or category with its grade and its weight.
  2. Read your weighted grade, which updates as you type.
  3. Use the final-exam box to find the score you need for your target grade.

What is a weighted grade?

A weighted grade is a class score, or mark, in which each category counts in proportion to its weight, so a midterm worth 25% moves your grade more than a quiz worth 5%. The formula multiplies each score by its weight, adds the products, and divides by the total weight:

weighted grade = Σ(score × weight) ÷ Σ(weights)

Homework at 92% worth 40% and a midterm at 88% worth 25% give (92 × 40 + 88 × 25) ÷ 65, which is 5,880 ÷ 65, or 90.46%. Run the same formula backwards and it tells you what score on the final reaches any target, which is exactly what the planner below the calculator does.

Worked example

Input: Homework 92% (40%), Midterm 88% (25%)
→
Result: Weighted grade so far: 90.5%

Typical US letter grade scale

LetterPercent rangeLetterPercent range
A+97 to 100C+77 to 79
A93 to 96C73 to 76
A-90 to 92C-70 to 72
B+87 to 89D+67 to 69
B83 to 86D63 to 66
B-80 to 82D-60 to 62

Below 60 is an F on this scale. Cutoffs vary by school: many use a straight 90/80/70/60 scale with no plus or minus bands, so check your syllabus.

How a weighted grade works

A weighted grade multiplies each score by how much that category counts, adds those up, and divides by the total weight. With homework at 92% worth 40% and a midterm at 88% worth 25%, the math is (92 × 40 + 88 × 25) ÷ 65, which is 5,880 ÷ 65, or 90.46%. A 92% on homework worth 40% moves the needle more than a 92% on a quiz worth 5%. Weights do not have to add up to 100 while the term is in progress; the tool divides by whatever weights you have entered so the running grade stays honest.

The final-exam formula

The planner rearranges the same math. If the final is worth F as a decimal, your current grade is C, and you want to finish at T, the score you need is (T − C × (1 − F)) ÷ F. Say you are at 85%, the final is 30% of the grade, and you want an 88%: (88 − 85 × 0.70) ÷ 0.30 = 28.5 ÷ 0.30 = 95%. Wanting a 90% from the same spot needs 101.7%, which the tool flags as out of reach without extra credit. Aiming for an 80% needs only 68.3%, so you can see at a glance how much room you have.

Two things often catch people out. First, the ‘current grade’ should be your weighted grade across everything except the final, not a simple average of your scores. Use the top calculator to get that number, then carry it into the planner. Second, if your syllabus drops the lowest quiz or lets the final replace a midterm, model that by leaving the dropped item out or moving its weight onto the final.

Letter cutoffs vary by school, but the common US scale is 90 to 100 for an A, 80 to 89 for a B, 70 to 79 for a C, 60 to 69 for a D, and below 60 for an F. Check your syllabus before you plan around a number, since some instructors set an A at 93 or use plus and minus bands.

Common uses

  • Tracking your grade during the term
  • Planning the score you need on a final
  • Checking a syllabus's weighting
  • Deciding where to focus your study time
  • Finding the minimum score needed to pass
  • Modeling a dropped quiz or replaced midterm

When to use it

  • You are asking what do I need on my final to get an A and want a number, not a guess.
  • Midway through the term you want to know how to calculate your grade with weighted categories.
  • Your instructor drops the lowest quiz score and you want to see your grade with and without it.
  • You are deciding whether studying for the final or finishing a project moves your grade more.

Related tools

The GPA Calculator takes over once letter grades are final and you need your average on the 4.0 scale.

The Average Calculator handles unweighted lists, where every score counts the same.

The Percentage Calculator turns a raw score like 45 out of 50 into the percent you enter here.

Frequently asked questions

No. During the term you can enter only the categories you have grades for, and the tool weights them against each other. At the end, entering all categories with their real weights gives your true final grade.
Multiply each category's score by its weight, add the results, and divide by the sum of the weights. Homework at 92% worth 40% and a midterm at 88% worth 25% give (3,680 + 2,200) ÷ 65, which is 90.46%.
Enter your current grade, your target grade and the final's weight. The planner shows the exact score you need, and warns you if it is above 100%. The formula is (target − current × (1 − weight)) ÷ weight, with the weight written as a decimal such as 0.30.
Put the passing cutoff in the target box. If you have a 72%, the final is worth 25%, and passing is 70%, you need (70 − 72 × 0.75) ÷ 0.25, which is 64% on the final. Check your syllabus for the actual cutoff, since 60% and 70% are both common.
The target is not reachable with the final alone. Your options are extra credit, a lower target, or checking whether the final replaces an earlier grade. A negative result means the opposite: you have already locked in the target and any score on the final keeps you there.
Enter grades as percentages for the weighted calculator. If your class uses raw points, convert each score to a percentage first: 45 out of 50 is 90%. For a purely points-based class, the weight of each item is simply its maximum points.
Yes. If your instructor drops the lowest quiz, remove that row before reading your grade, since the tool weights everything you enter. Leaving it in will understate your real grade.
On the most common US scale, 90% and above is an A, 80 to 89 is a B, 70 to 79 is a C, and 60 to 69 is a D. Many schools split these into plus and minus bands, and some set the A cutoff at 93, so your syllabus is the final word.