How to use the weighted grade calculator
- Choose Percent or Points. Use Percent if your gradebook shows each part as a percentage, such as 85%. Use Points if you have scores like 45 out of 50.
- Fill in one row for each assignment or category, with its grade and its weight from the syllabus, such as "Homework 20%". The name is optional and only helps you read the breakdown.
- Add or remove rows as you need. A row with a weight but no grade yet, such as a final you have not taken, is left out and listed as not graded yet.
The weighted average updates as you type, with a breakdown of what each row adds. Copy result gives you a plain text summary to paste into notes or a message.
How a weighted grade is worked out
Multiply each grade by its weight, add those up, and divide by the total of the weights:
Weighted average = (grade 1 × weight 1 + grade 2 × weight 2 + ...) ÷ (weight 1 + weight 2 + ...)
When the weights add up to 100, that last step is just dividing by 100. Here is a class with four parts:
| Part | Grade | Weight | Grade × weight ÷ 100 |
|---|---|---|---|
| Homework | 92% | 20% | 18.4 |
| Quizzes | 85% | 20% | 17 |
| Midterm | 78% | 25% | 19.5 |
| Final exam | 88% | 35% | 30.8 |
| Total | 100% | 85.7% |
A plain average of the four grades would be 85.75%. The weighted average is a little lower, 85.7%, because homework, the highest of the four grades, counts for only 20% of the course.
Grades in points
In Points mode each row's grade is points earned divided by points possible, times 100. Lab reports at 45 out of 50 are 90%. For example:
| Part | Points | Percent | Weight | Adds |
|---|---|---|---|---|
| Lab reports | 45 / 50 | 90% | 30% | 27 |
| Quizzes | 34 / 40 | 85% | 30% | 25.5 |
| Test | 70 / 100 | 70% | 40% | 28 |
| Total | 100% | 80.5% |
Some classes have no percentage weights at all: your grade is simply all the points you earned divided by all the points possible. You can still use this calculator. Put the points possible for each part in its Weight box. A homework total of 180 out of 200 and exams at 255 out of 300 give (90 × 200 + 85 × 300) ÷ 500 = 87%, the same as 435 ÷ 500.
When the weights do not add up to 100
The calculator always divides by the weights you actually entered, so the result stays on the usual 0 to 100 scale. It also tells you the total and shows the other figure, grade times weight divided by 100, so you can choose the one that fits your situation.
- Work still to come. Midway through a course, your final exam (35%) has no grade yet. The first three rows above add up to 18.4 + 17 + 19.5 = 54.9 points from 65% of the course. Dividing by 65 gives 84.46%, your average on the work done so far. Dividing by 100 gives 54.9%, which is what you would end on if everything still to come scored zero. The first is the useful one for knowing where you stand. To find what you need on the remaining work, try the final grade calculator with 84.46% as your current grade.
- A typo in the weights. If your syllabus weights should add up to 100 but yours come to 95 or 110, check them against the syllabus first. The note under the result shows the total you entered.
- Extra credit on top. If your class adds a bonus category on top of 100%, dividing by the full total would shrink its effect. In that case the grade times weight divided by 100 figure is the one that matches how the bonus is meant to work.
Letter grades
With Show a letter grade on, the result includes a letter on a widely used 10-point scale: A for 90 to 100, B for 80 to 89, C for 70 to 79, D for 60 to 69 and F below 60. The US National Center for Education Statistics uses the same cut-offs when it standardizes high school transcripts, while noting that grade information can "vary considerably among schools, districts and states".
So treat the letter as a guide. Your school may use plus and minus grades or different cut-offs, and some teachers round 89.5 up while others do not. Your syllabus is the final word.
Questions and answers
What is a weighted grade?
A grade where some parts count more than others. If the final exam is worth 35% and homework 20%, a point on the exam moves your grade more than a point on homework. The weighted average multiplies each grade by its weight before adding them up.
Do the weights have to add up to 100?
No. The calculator divides by the total of the weights you entered, so the result is still a percentage. It tells you when the total is not 100 and shows the grade times weight divided by 100 figure as well.
How do I enter a test I have not taken yet?
Fill in its weight and leave the grade empty. It is listed as not graded yet and left out, so the result is your average on the work graded so far.
How do I add extra credit?
If the extra credit raises a category, enter that category above 100%, or with more points earned than possible. If it is a separate bonus on top of the course, add it as its own row and use the grade times weight divided by 100 figure.
Can I use points instead of percentages?
Yes. Choose Points and enter points earned and points possible for each row. Each row is turned into a percentage before the weights are applied.
Is the letter grade the one my school uses?
Not necessarily. It uses a common 10-point scale (90 and above is an A). Many schools use plus and minus grades or other cut-offs, so check your syllabus.
Sources
Checked on 7 October 2026. If a rule has changed, please tell us.