Grade calculator
Your weighted average grade, and the score you need on the final.
About this calculator
This grade calculator works out your current grade from weighted assignments, quizzes and exams, and the score you need on the final to reach your target.
Enter each score and its weight on its own line. Scores can be percentages or points, such as 44/50.
How it works
The weighted grade is the sum of each score × its weight, divided by the total weight. The score needed on a final is (target − current × (1 − final weight)) ÷ final weight.
Last reviewed:
Worked example
- Work out: My current grade
- One item per line: score, then weight: 88 20; 92 15; 76 25; 85 40
Your grade: 84.4% (B)
Common questions
How do I calculate a weighted grade?
Multiply each score by its weight, add the results and divide by the total of the weights. A 90 worth 40% and an 80 worth 60% give (90 × 40 + 80 × 60) ÷ 100 = 84.
What do I need on my final to pass?
Choose What I need on the final, enter your current grade, the grade you need and how much the final is worth. The table also shows your result for different exam scores.
What letter grade is 85%?
On the common US scale, 85% is a B (83 to 86). A is 93 and above, A- 90 to 92, and so on down to F below 60. Schools can use their own scales.
The story behind it
Where the idea came from: Mount Holyoke College in Massachusetts is often credited with one of the first letter-grade scales, in 1897.
Universities once ranked students with written comments or numbers out of 100. Letter grades spread through American schools in the early 1900s because they were quick to read and compare. Weighted grading, where a final exam counts for more than a quiz, is how most courses combine them today.
Why you can trust this calculator
- It runs in your browser. Nothing you type into it is sent anywhere.
- The method is explained on this page, so you can check it yourself.
- Free to use, with no sign-up.
- Results are estimates, so please double-check anything important.
- Spotted a mistake? Tell us and we'll look into it.
After 15 years as a mathematics educator, I built CalculStore to give students, teachers, professionals and anyone working with numbers simple, reliable tools.
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