What is the Grade Calculator?
A grade calculator works out your overall grade in a class when different pieces of work count for different amounts, and tells you what you need on the final exam to reach the grade you want.
In weighted grade mode, add a row for each assignment or category with its grade and weight, and see your weighted average and letter grade. In final exam mode, enter your current grade, the grade you want and how much the final counts, and see the score you need.
How to use it
- 1
Pick a mode
Choose Weighted grade or Final exam needed.
- 2
Enter your grades
Add each assignment's grade and weight as percentages, or enter your current grade and target.
- 3
Set the final's weight
In final exam mode, enter how much of the class grade the final is worth.
- 4
Read the result
See your weighted grade and letter, or the score you need on the final.
Features
Weighted average
Each grade counts according to its weight, so a 30% midterm matters more than a 10% quiz.
Letter grade
See the letter on a standard US scale, with or without plus and minus grades.
Final exam score needed
Find the percentage you need on the final to reach your target grade.
Partial weights
If your weights add up to less than 100%, you see your grade so far on the work already marked.
Formula shown
The final exam result shows the formula with your own numbers.
Popular uses
Before the final
Find out how hard you need to study to keep or raise your grade.
Tracking a class
Keep an eye on your grade as marks come back during the term.
Checking your syllabus
Make sure the grade in your school's portal matches the weights you were given.
Teachers and tutors
Show a student what they need on upcoming work.
Frequently asked questions
How do I calculate a weighted grade?
Multiply each grade by its weight, add those together, then divide by the total of the weights. For example, 90% on homework worth 40% and 80% on a test worth 60% gives (90 × 40 + 80 × 60) ÷ 100 = 84%.
How do I work out what I need on my final?
Use needed = (desired − current × (1 − w)) ÷ w, where w is the final's weight as a decimal. With a current grade of 80%, a target of 85% and a final worth 30%, you need (85 − 80 × 0.7) ÷ 0.3 ≈ 96.7%.
What if the score needed is over 100%?
Then the target cannot be reached with the final alone unless it has extra credit. The calculator shows the best grade a perfect final would give you.
What letter grade is an 85%?
On the common US scale, 85% is a B, or a B on the plus/minus scale (83 to 86.99). Schools set their own cut-offs, so check your syllabus.
Do my weights have to add up to 100%?
No. If they add up to less, the result is your grade on the work marked so far. If your class uses points instead of percentages, enter each category's share of the total points as its weight.