Average Calculator
Calculate mean, median, mode, range, and more for any number set. Includes weighted average mode and a visual distribution of your data.
Enter at least one number
About Average Calculator
This calculator computes several measures of central tendency and spread for any set of numbers you provide. It is useful for schoolwork, data analysis, and quick statistical checks.
Mean, Median, and Mode
The three most common averages are calculated automatically. The arithmetic mean sums all values and divides by the count. The median finds the middle value in a sorted list. The mode identifies which value or values appear most often. Together, these give a well-rounded picture of where your data is centered.
Weighted Average
Switch to weighted average mode to assign a weight to each value. This is especially useful for grade calculations, financial analysis, or any situation where some data points carry more significance than others. The calculator multiplies each value by its weight, sums the products, and divides by the total weight.
Summary Statistics
Beyond the averages, you will see the sum, count, minimum, maximum, and range of your data. The sorted data list is also displayed so you can quickly verify the order and spot any outliers.
Visual Distribution
A simple bar chart shows how your values are distributed, making it easy to spot clusters, gaps, or skewness in the data. This visual aid helps you understand the shape of your data at a glance without needing dedicated charting software.
All calculations run entirely in your browser. Your data is never transmitted to any external server.
Frequently Asked Questions
What is the difference between mean, median, and mode?
Mean is the arithmetic average - add all numbers and divide by the count. Median is the middle value when numbers are sorted in order; if there is an even count, it is the average of the two middle values. Mode is the value that appears most frequently. A data set can have no mode, one mode, or multiple modes.
When should I use median instead of mean?
Median is more appropriate when your data contains outliers or is heavily skewed. For example, if most household incomes are around $50,000 but one is $10,000,000, the mean would be pulled far upward while the median stays near the typical value. Median gives a better sense of the central value in such cases.
What is a weighted average and when is it useful?
A weighted average assigns different importance (weights) to each value. For example, if a final exam is worth 50% of your grade and homework is worth 50%, you would weight the exam score by 0.5 and the homework score by 0.5. This is common in academic grading, financial portfolio returns, and survey analysis.
Can a data set have more than one mode?
Yes. If two values tie for the highest frequency, the data set is bimodal. If three or more values tie, it is multimodal. If every value appears the same number of times, there is no mode. This calculator reports all modes when multiple exist.
How does this calculator handle decimal numbers?
The calculator fully supports decimal numbers. Enter values like 3.14 or 0.5 and the results will reflect full decimal precision. All results are rounded to a reasonable number of decimal places for readability.