Grade Calculator

How to calculate your grade

1. Choose the Calculation: Weighted average (grade × weight) for most course outlines, or Total points (sum earned ÷ sum possible) when your teacher simply adds up points.
2. Fill one row per assignment, quiz or exam. The Grade column accepts a percentage (85), points (17/20) or a letter (B+). The Weight column takes the share of the course (20 for 20%) or a coefficient (2).
3. Use Add a row for more items and the × button to remove one. Clear empties the table.
4. Read your Average, the matching Letter (GPA points), the Total weight and the number of Items counted. The calculation is shown step by step below the results.

Everything updates as you type, and rows with a problem are highlighted in red with a short explanation.

How a weighted grade works

A weighted average gives more influence to the items that count more. Each grade is multiplied by its weight, the products are added, and the sum is divided by the total weight:

Average = Σ (grade × weight) ÷ Σ weight

Example: homework 18/20 (90%) worth 20%, a midterm at 85% worth 30% and a project at 88.5% worth 50%. The products are 1,800 + 2,550 + 4,425 = 8,775, and 8,775 ÷ 100 = 87.75%.

If you leave every weight empty, the tool computes a simple average in which each item counts once. As soon as one weight is filled in, every graded row needs a weight, so that nothing is counted by accident.

When the weights don’t add up to 100

Halfway through a term, your graded work might only cover 40% of the course. The tool then divides by 40, not by 100, which gives your current average on the work graded so far. A note tells you when the weights add up to something other than 100. To see what you need on the remaining work, use the final grade calculator.

Total points instead of weights

Some teachers skip weights and simply add up points: 8/10 + 45/50 gives 53/60, or 88.33%. Choose Total points for that method. Every grade must then be written as points (earned/possible). The result differs from a weighted average, because a 50-point test automatically weighs five times as much as a 10-point quiz.

Letter grades and scales

When you type a letter, the tool turns it into the middle of its percentage range on the chosen Letter grade scale (example): on the US scale with +/−, a B+ covers 87% to just under 90%, so it counts as 88.5%. Your average is then converted back to a letter with the same scale. Three example scales are available: US with +/−, US without +/−, and a Canadian 4.33 scale. They are only examples: cut-offs and grade points vary between schools, school boards and universities, so check your syllabus.