Average Percentage Calculator
Find the average of multiple percentages instantly. Supports simple mean, weighted averages, and shows a step-by-step formula breakdown — ideal for grades, discounts, growth rates, and more.
Average Percentage Estimator
Enter your percentages below and choose your calculation method
Average Percentage Result
Mean, range, and full breakdown
Enter your percentages and click Calculate Average to see the mean, highest, lowest, and step-by-step formula.
Common Use Cases for Averaging Percentages
Click any example to load it instantly into the calculator above.
Student Exam Grades
Average your test and assignment scores to find your overall percentage grade.
Survey Approval Ratings
Combine approval percentages from multiple survey groups into one overall figure.
Monthly Growth Rates
Find the average monthly growth rate across a quarter or year of business data.
Product Discounts
Average the discount percentages across multiple products to find your mean saving.
Weekly Humidity Readings
Average daily percentage humidity readings to find the weekly mean.
Project Completion Rates
Find the average task or project completion percentage across a team or department.
Average Percentage FAQ
Everything you need to know about averaging percentages correctly.
To find the average of multiple percentages, add all the percentage values together and divide by the number of values. For example, if your percentages are 40%, 60%, and 80%, the average is (40 + 60 + 80) ÷ 3 = 60%. This is the simple (unweighted) average, and it is accurate when each percentage applies to the same base or sample size.
You should use a weighted average when each percentage applies to a different base or sample size. For example, if Store A had a 30% sale rate on 200 items and Store B had a 50% sale rate on 1,000 items, a simple average would give 40% — but this is misleading because Store B has far more data. A weighted average (30×200 + 50×1000) ÷ 1200 = 46.7% gives the accurate combined result.
Yes, you can average percentages directly using simple addition and division when the groups or samples they describe are all the same size. If the sample sizes differ, a direct average can produce a misleading result. In those cases, use a weighted average that accounts for each group’s size (weight).
The simple average percentage formula is: Average % = (P1 + P2 + … + Pn) ÷ n, where P1–Pn are your individual percentages and n is how many there are. The weighted average percentage formula is: Weighted Average % = (P1×W1 + P2×W2 + … + Pn×Wn) ÷ (W1 + W2 + … + Wn), where W1–Wn are the weights (e.g. sample sizes) for each percentage.
To average exam scores expressed as percentages, simply add all the percentage scores together and divide by the number of exams. For example, scores of 72%, 85%, and 91% give an average of (72 + 85 + 91) ÷ 3 = 82.7%. If each exam is worth a different portion of your final grade, use a weighted average where the weight is each exam’s contribution to the total grade.
Average percentage is the mean of a set of percentage values (e.g. averaging test scores of 70%, 80%, 90% gives 80%). Percentage change measures how much a value has increased or decreased from one point to another, calculated as ((New Value − Old Value) ÷ Old Value) × 100. These are two very different calculations; this tool computes the mean of multiple percentage values.