Weighted Average Calculator
Free weighted average calculator: enter grades with their weights, credits or percentages and get the weighted average, the plain average and a step-by-step table. Paste from a spreadsheet, save your list and open it on any device with a link.
Enter each grade (or any number) and how much it counts: credits, hours, points or a percentage. Only the weights relative to each other matter.
About the weighted average calculator
Although a weighted average calculator is often used to find an overall semester average for courses that count for different numbers of credits, the same calculation works for any group of numbers: assignments, tests, courses or whole semesters. It can also give a plain, unweighted average: set every weight to the same value (the Equal weights button sets them all to 1).
How does it work?
A basic average adds up the grades and divides by how many there are. A weighted average multiplies each grade by its weight, adds those up, and divides by the total weight:
- Basic average = (Grade1 + Grade2 + …) ÷ (number of grades)
- Weighted average = (Grade1 × Weight1 + Grade2 × Weight2 + …) ÷ (Weight1 + Weight2 + …)
For example, grades of 90, 80 and 70 with credits 3, 4 and 2 give (90×3 + 80×4 + 70×2) ÷ 9 = 730 ÷ 9 = 81.11, a little higher than the plain average of 80 because the 90 counts for more than the 70.
Good to know
- Percentage weights (e.g. 20%, 30%, 50%) work the same way; they do not have to add up to 100.
- Saving: your list is saved in this browser. Use Copy link to this list to open it on another device — the link holds the whole list, nothing is uploaded.
- Need the grade for a final exam? Use the Final Grade Calculator. GPA? Use the GPA Calculator. Weighted Average Tutorial