Average Percentage Calculator
Use this calculator to combine two or more percentages. A simple average treats each value equally. A weighted average uses credits, credits hours, or any other weights you enter. Averaging percents is not the same as taking a percent of a number.
How this is calculated
A simple average adds the percents and divides by how many there are. A weighted average multiplies each percent by its weight, then divides by the sum of weights.
simple: (p1 + p2 + …) / n; weighted: Σ(value × weight) / Σ(weight)
- 80 and 90: (80 + 90) / 2 = 85.
- 80 with weight 2 and 90 with weight 1: (160 + 90) / 3 = 83.333…%.
- 70, 80, and 90: (70 + 80 + 90) / 3 = 80.
Do not use this tool to find 15% of 80. That is percent of a number, not an average of percents.
Not the same as
An average of percentages is a mean. A percent of a number is a product.
- What is X percent of Y? That tool takes one percent and one number. This tool averages several percentages. Open percent of a number
Related tools
Average-percentage questions
85%.
83.333…%. (80 × 2 + 90 × 1) / 3.
Yes. Convert each paper to a percent first, then average. Use weights if the papers have different credit.
No. 15% of 80 is 12. The average of 10% and 20% is 15%, which is still a percent, not an amount.
The weighted average cannot run, because it would divide by zero.
80%.