Average Percentage Calculator

Calculate the simple or weighted average of multiple percentages.

Enter Percentages

Choose calculation mode and enter percentage values

Percentage (%)

How to Calculate Average Percentage

Depending on whether each percentage is worth the same value, you will use either simple or weighted calculation.

Simple Average Formula

Use this if all percentages have the same weight (e.g. 3 school subjects of 100 marks each):

Simple Average = (P₁ + P₂ + ... + Pₙ) / n

Where P represents each percentage and n is the total count.

Weighted Average Formula

Use this if percentages have different weights (e.g. semesters with different course credits or exams with different marks weightings):

Weighted Average = Σ(Percentage × Weight) / Σ(Weight)

Each percentage is multiplied by its corresponding weight, then summed up and divided by the sum of all weights.

Frequently Asked Questions

How do you calculate the simple average of percentages?
Add all individual percentages together and divide by the total count of percentages. For example, the average of 70%, 80%, and 90% is (70 + 80 + 90) / 3 = 80%.
How do you calculate a weighted average of percentages?
Multiply each percentage by its corresponding weight (credits, total marks, or grade weight), sum those products, and divide by the sum of all weights. Formula: Weighted Average = Sum of (Percentage * Weight) / Sum of Weights.
Can I use semester credits as weights for average percentage?
Yes, if you want to find the cumulative percentage of multiple semesters, you can enter the percentage obtained in each semester and use the total credits for each semester as the weight.
Why isn't simple average always correct for grades?
A simple average assumes all tests, assignments, or courses are of equal importance. If one course is worth 4 credits and another is worth 2 credits, the 4-credit course has double the impact, requiring a weighted average calculation.