Grade Calculator
Weighted course grade, and the score you need on the final.
How to use Grade Calculator
- For a course grade, type one item per line: name, score, weight. Scores can be a percentage (92) or points (45/50).
- If the weights add up to less than 100%, the result is your grade so far; enter the grade you want to see what you need on the rest.
- Or switch to "Score needed on the final" and enter your current grade, target and the final’s weight.
How it works
Weighted grade = Σ(score % × weight) ÷ Σ(weights). If you leave the weights out on every line, points are simply added: total earned ÷ total possible.
Score needed on the final = (target − current × (1 − w)) ÷ w, where w is the final’s weight as a decimal and "current" is your grade on everything else. If the answer is above 100%, the target is out of reach without extra credit, and the tool tells you the best grade still possible. Letter grades use the common US scale (A 93+, A− 90, B+ 87, B 83, B− 80, C+ 77, C 73, C− 70, D+ 67, D 63, D− 60).
Example
Current grade 88%, final worth 25%, target 80%: (80 − 88 × 0.75) ÷ 0.25 = 56% needed on the final.
Frequently asked questions
How do I calculate a weighted grade?
Multiply each score by its weight, add the results and divide by the total weight. Homework 90 at 20% and a test 80 at 30%: (90 × 20 + 80 × 30) ÷ 50 = 84%.
What do I need on my final to get an A?
Switch to "Score needed on the final", enter your current grade, 90 or 93 as the grade you want (check your syllabus), and the final’s weight.
What if my class uses points, not percentages?
Enter scores as earned/possible (45/50) and leave the weights out. The grade is total points earned divided by total points possible.
Why is my grade different from the school’s system?
Courses may drop the lowest score, curve, round or weight categories differently. Check the syllabus and enter categories the way it describes.
Limitations
- Does not drop lowest scores, apply curves or extra credit automatically.
- Letter-grade cut-offs vary by school and course.
Last reviewed November 9, 2026. How we build and test tools.