About the Grade Calculator
This grade calculator does two jobs for a single course. In the first, you list assignments with a grade and a weight, and it returns your weighted grade and a letter. In the second, you enter your current grade, the grade you want and the weight of the final exam, and it tells you what score the final has to be. Grades can be typed as 85, 85% or as a score like 17/20. The letter uses a common US scale where A starts at 93, but schools differ, so treat it as a guide. It does not drop your lowest scores, and the final-exam answer assumes the rest of your grade stays as entered.
Updated September 2026
How to use the Grade Calculator
- 1Pick My current grade or What do I need on the final?
- 2For the first, type each grade (85, 85% or 17/20) and its weight in percent.
- 3Add or remove rows as needed, and read the weighted grade and letter.
- 4For the final, enter your current grade, your goal and the final's weight.
- 5Check the score needed and the table of other targets.
How weighted grades work
In a weighted course, some work counts more than other work. A final exam might be worth 30 percent and homework 20 percent, so a single homework score cannot move your grade as much as one exam mark. Each grade is multiplied by its weight, the products are added, and the total is divided by the sum of the weights.
That division is why the calculator still works when the weights do not reach 100. It simply averages the work counted so far.
Working out what you need on the final
Before the final, part of your grade is fixed: your current grade multiplied by the share of the course that is already done. The final has to make up the rest. If you have 85 and the final is worth 20 percent, you keep 68 points of your grade and need 12 more to reach an 80, which means 60 percent on the exam.
The result is marked not possible when the score needed is above 100, and already achieved when it is zero or less. The table lists other targets so you can see what a B or a C would take.
Points versus percentages
Some teachers give scores out of 20 or 50 rather than a percentage. Type them as a fraction like 17/20 and they are converted automatically. Some courses count total points across the term instead of weighting categories; in that case each item's weight is its share of all the points, and you can enter that share as the weight.
Letter grades are school-specific
The letters shown follow one common US scale: A from 93, A- from 90, B+ from 87, B from 83, B- from 80, and so on down to D- at 60. Your school may use different cut-offs, round up at a half point, or use numbers only. If your grading is by grade points instead, the GPA Calculator adds several courses together, and the CGPA to Percentage tool converts between systems. To check a single percentage, the Percentage Calculator is quicker, and the Average Calculator is handy when every score counts equally.
Features
- Weighted grade from any number of rows
- Accepts percent, 85% or points such as 17/20
- Letter grade on a common US scale
- Warning when the weights do not add to 100
- Score needed on the final for your goal
- Clear message when a target is out of reach
- Table of needed scores for A, B, C and D
- Runs in your browser
Frequently asked questions
How do I calculate a weighted grade?
Multiply each grade by its weight, add the results, and divide by the total weight. With 90 at 30 percent, 80 at 20 percent and 70 at 50 percent you get (2,700 + 1,600 + 3,500) divided by 100, which is 78. Enter your rows above and the page does the sum.
What grade do I need on the final to get an A?
Choose the final exam tab, type your current grade, tap A 90 and enter the weight of the final. The formula is the goal minus the part of your grade that is already fixed, divided by the final's weight. If the answer is over 100 percent, the page says it is not possible.
How do I turn 17/20 into a percentage?
Divide 17 by 20 and multiply by 100 to get 85 percent. You can type 17/20 directly into the grade box and the calculator converts it for you, and 3.5/4 becomes 87.5 percent.
What if my weights don't add to 100?
The grade shown is an average of the work you have entered so far, weighted by the numbers you gave. A note reminds you how much of the course the weights cover, for instance 50 percent if only half the coursework is done.
What is a passing grade?
It depends on the school and country. Many US courses pass at 60 or 70 percent, while some programmes require higher marks. Use the final exam tab with the passing mark as your target to see what you need.
Can I use points instead of percentages?
Yes. Type each score as points earned over points possible, such as 43/50, and give it a weight. If your course simply adds up all points, use each category's total points as its weight relative to the whole.
Can a grade be above 100 percent?
Yes, for extra credit. The calculator accepts grades up to 200 percent and flags anything above 100 with a small note.