Grade Calculator

How to use it

1. Type one item per line: the score as a percentage, then its weight as a percentage. For example 90 20 means 90% on something worth 20% of the course.
2. Type the overall grade you are aiming for.
3. Read your current grade and the score needed on the rest.

The formulas

Current grade = sum of (score × weight) ÷ sum of weights

Score needed = (target × 100 − sum of (score × weight)) ÷ remaining weight

Worked example

Item	Score	Weight	Score × weight
Homework	90	20	1,800
Midterm	85	30	2,550
Project	78	20	1,560
So far		70	5,910

Current grade = 5,910 ÷ 70 = 84.43%.

The final exam is the remaining 30%. To finish on 85% overall: (85 × 100 − 5,910) ÷ 30 = 2,590 ÷ 30 = 86.33% needed on the final.

If your course uses points

Convert each item to a percentage first. 42 out of 50 is 42 ÷ 50 × 100 = 84%. If every point in the course counts equally, the weight of an item is its share of the total points.

Limits

• The weights you enter must not add up to more than 100.
• The tool assumes one score for everything still to come. If several items remain, the figure is the average you need across them.
• Dropped lowest scores, curves and extra credit are not handled.
• Letter-grade boundaries differ between schools, so the tool shows percentages only.