A weighted average calculator helps when you’re working with numbers that aren’t all equal in value.
Maybe one test is worth 40% of your grade. Another? Just 10%.
A plain average doesn’t quite cut it—but this does.

✅ Step 1: Add your entries

Click the “Add Assignment” button. A new row appears. For each one, type in:

• The assignment name (like Midterm, Quiz 1, or Final Project)
• The grade you received (or expect to get)
• The weight it carries—maybe 15%, 40%, or anything else

Add as many as you need. You can delete extras if something changes. Totally up to you.

✅ Step 2: Fill everything in

Make sure every row has a grade and a weight. You can use whole numbers or decimals.
If your weights don’t add to exactly 100%—don’t worry. The calculator handles that later.

✅ Step 3: Hit calculate

Click the button labeled “Calculate Weighted Average.”
The calculator multiplies each grade by its weight, adds everything together, and then divides by the total weight.
If you’re curious about the math, here’s the formula:

That’s it. No spreadsheet. No need to write out the equation. You get your result instantly.

✅ Step 4: Check your results

You’ll see two things:

• Your weighted average, as a percentage
• The total weight of your inputs

If the weights don’t add up to 100%, you’ll see a yellow warning. That’s not always an error,
but it’s a good idea to double-check.