Grade Calculator
Work out your final weighted grade.
Your score on each component, separated by commas.
Weight of each component. Leave blank for a simple average.
Results update as you type.
How it works
A grade calculator combines the scores from your assignments, tests and exams into a single final result, honouring the fact that not every assessment counts equally. You enter each score and, optionally, the weight it carries in the course. The tool multiplies each score by its weight, sums those products, and divides by the total weight to produce your weighted percentage, then maps that onto a letter grade. Weighting is what makes the number trustworthy. A final exam worth 50 percent of the course should move your grade far more than a quiz worth 5 percent, and a plain average of the two would badly misrepresent where you stand. A grade calculator applies each weight correctly so the result matches how your instructor actually tallies the course. The multiply-by-weight-then-divide method is the same weighted-average formula used on report cards and in grading software everywhere. Students use a grade calculator to check their current standing before an exam, work out the score they still need to hit a target, and remove the anxiety of guessing. Teachers, tutors and parents use it to verify marks quickly. Leave the weights blank and it falls back to a simple, unweighted average of every score you enter.
final = Σ(score × weight) ÷ Σ(weight)
Each score is multiplied by its weight so that heavier assessments contribute proportionally more to the result. Summing those weighted products gives the total earned across the course. Dividing by the sum of all weights rescales that total back onto a 0 to 100 percentage, which is why the weights need not add up to 100 — any consistent scale works because the division normalises them automatically.
Source:Standard weighted-average grading
We review all our tools from time to time to ensure accuracy.
Worked example
How to use this calculator
- 1
Enter your values
Enter scores (%).
- 2
Adjust the options
Adjust weights (%) if they apply — sensible defaults are already set.
- 3
Read your result
Final grade updates instantly as you type — no button to press.
Frequently asked questions
Do the weights need to add up to 100?
No. The calculator divides by the total of your weights, so any consistent scale produces the correct result. Weights of 1, 1 and 2 give exactly the same grade as 25, 25 and 50, because both describe the same relative importance. This is handy when a syllabus lists weights as points, categories or fractions rather than neat percentages. Just enter the numbers as your course states them and let the division normalise them for you.
What grade do I need on the final exam?
Work backwards from your target. Enter your current scores and their weights to see where you stand, then treat the final as the remaining weight. If everything so far totals 60 percent of the course at an 85 average and the final is worth 40 percent, the score you need on it to reach a target grade follows directly. Set the required final grade aside first, then solve for the missing score.
What happens if I leave the weights blank?
The calculator returns a simple, unweighted average — it adds your scores and divides by how many there are. The same fallback applies if the number of weights does not match the number of scores, which prevents a mismatched entry from producing a misleading result. Use the unweighted mode for quick checks where every assessment counts equally, and fill in weights whenever your course treats some items as more important.
How is the letter grade determined?
The tool applies a common United States scale in which 90 to 100 percent is an A range, 80 to 89 a B, 70 to 79 a C, 60 to 69 a D, and below 60 an F. Your own school may set different cutoffs, use plus and minus bands, or round differently, so always confirm against the official grading policy in your syllabus before relying on the letter for anything important.
Can I use this for my whole semester grade?
Yes. Enter every graded component of the course — homework, quizzes, projects, midterms and the final — with each one's weight, and the result is your projected semester grade. For categories that hold several items, average that category first, then enter it as one weighted score. Update the figures as new marks come in to keep a running, accurate picture of your standing throughout the term.