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Grade Calculator

Calculate your weighted average grade from percentage, letter or points grades — and work out the grade you need on a final exam — free and instantly in your browser.

Select grade type
Assignment (optional)Grade (%)Weight
Find additional grade needed to reach % (assumes weights in %)
Decimal places:

About the Grade Calculator

A grade calculator works out your overall course grade from each assignment's grade and its weight. This tool handles three grade types — percentages, letter grades (A+ to F) and points — and also includes a final-grade calculator (the score you need on a final exam) and a GPA calculator. Everything runs locally in your browser; nothing is uploaded.

How Grade Calculator works

The weighted grade is the sum of each grade multiplied by its weight, divided by the total weight:

Weighted grade = (g₁×w₁ + g₂×w₂ + …) ÷ (w₁ + w₂ + …)

Example: Math 80 (weight 30%), Biology 90 (50%), History 72 (20%): (80×30 + 90×50 + 72×20) ÷ 100 = 8340 ÷ 100 = 83.4%.

To find the grade you need on a final exam: required = (target − current × (1 − w)) ÷ w, where w is the final's weight as a decimal.

How to use

  1. Enter your values as shown in the input box.
  2. The result is calculated instantly.
  3. Click Copy to use it.

Common uses

  • Average multiple assignment or test scores by weight
  • Convert letter grades (A+ to F) into a GPA and a percentage
  • Work out the score you need on a final exam to reach a target grade
  • Calculate a semester GPA from course credits and letter grades

Frequently asked questions

How is a weighted grade calculated?
Multiply each grade by its weight, add the results together, then divide by the total of the weights. If your weights already add up to 100, you can simply divide by 100.
What grade do I need on my final exam?
Use the Final grade calculator tab: enter your current grade, the weight of the final, and your target overall grade. It returns the score you need on the final.
How does the letter-grade scale work?
A+ and A = 4.0, A− = 3.7, B+ = 3.3, B = 3.0, B− = 2.7, and so on down to D− = 0.7 and F = 0.0, with matching percentages (A ≈ 93%, B ≈ 83%, C ≈ 73%).
Is my data saved or uploaded?
No. The grade calculator runs entirely in your browser — nothing you enter is sent to or stored on our servers.