Weighted Grade Calculator
Work out an overall grade from weighted components. Enter each component’s score (%) and its weight (%), in the same order.
How to enter your data: Put each piece of work on its own line. On each line, type the score first and its weight second, separated by a comma, for example 85, 20. Press Enter to start a new line for the next score.
A weighted grade calculator works out one overall grade when some pieces of work count for more than others. You enter each score together with how much it counts, called its weight, and the calculator blends them into a single final grade, usually shown as a percentage. It saves you from doing the multiplying and adding by hand.
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Where it is used
- Teachers: A teacher works out final report-card grades where homework, quizzes, and the final exam each count for a different share of the mark.
- Students: A student checks their current grade and sees what they need on the final exam to reach the mark they want.
- Training and HR staff: A workplace trainer combines several assessment scores into one overall result for a course, giving each part its proper weight.
How weighted grades work
Each component contributes to the final grade in proportion to its weight. Multiply each score by its weight, add them up and divide by the total weight. The weights do not have to sum to 100.
When should you use it?
Use this calculator whenever the different pieces of work do not count equally toward a final grade. In many courses, homework might be worth a small share while the final exam is worth much more. If you simply averaged the scores, the answer would be wrong, because it would treat everything as equal. This tool lets you tell it how much each score counts, so the pieces that matter more pull the final grade harder. It is handy for report cards, course results, and checking a grade before it becomes official.
What does the result mean?
The result is one overall grade, usually shown as a percentage out of 100. A higher number means better overall performance. What counts as good depends on the grading scale you use. In many schools a widely used letter scale treats 90 and above as an A, 80 to 89 as a B, 70 to 79 as a C, 60 to 69 as a D, and below 60 as failing. Your school or workplace may set different cut-offs, so always check the scale that applies to you before deciding what the number means.
Mistakes to avoid
The most common mistake is mixing up the score and the weight, so always put the mark first and how much it counts second. Make sure the weights reflect how much each part really counts, and if they are meant to add up to 100, check that they do. Do not leave out a piece of work that counts, and do not enter the same one twice. Finally, keep every score on the same scale, so use all percentages or all points, never a mixture, or the final grade will be off.
How to use this calculator
- Enter your first score, then its weight, separated by a comma, on the first line (for example 80, 20).
- Press Enter and add the next score and weight on a new line, then repeat for every piece of work.
- Check that each mark and its weight are the right way round and that nothing is missing or repeated.
- Read the final grade the calculator shows, then compare it against your grading scale to see what it means.
Worked example
Say homework scored 80 and counts for 20 percent, quizzes scored 90 and count for 30 percent, and the final exam scored 70 and counts for 50 percent. Enter them as 80, 20 then 90, 30 then 70, 50. The calculator gives a final grade of 78 percent.
Frequently asked questions
What do I type on each line?
Type one score followed by its weight, separated by a comma. For example, a score of 85 that counts for 20 percent would be entered as 85, 20.
Where do I get the weights from?
The weights are how much each part counts toward the final grade. Your teacher, course outline, or syllabus usually lists them, for example homework 20 percent and final exam 50 percent.
Do my weights have to add up to 100?
No. The calculator works out the totals for you, so any numbers that show the correct balance will do. Weights that add up to 100 are just easier to read as percentages.
What does the final number mean?
It is your overall grade, blending every score by how much it counts. A result of 78, for example, means 78 percent overall.
Can I use points instead of percentages?
Yes, as long as every score uses the same scale. Do not mix percentages with raw points in the same calculation, or the result will be wrong.
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