Calculate Mean, Median & Mode
Enter a dataset to find the mean (average), median (middle value), and mode (most common value). Step-by-step.
Three Measures of Central Tendency
Mean: Add all values, divide by count. Best for symmetric data without outliers. Median: The middle value when data is sorted. Best for skewed data — resistant to extreme values. Mode: The most frequently occurring value. Can be used with categorical data. Each measure tells you something different about the "center" of your data.
Step-by-Step Process
Mean: Sum all numbers, divide by how many. For {4,8,6,5,3}: sum=26, count=5, mean=5.2. Median: Sort the numbers {3,4,5,6,8}, pick the middle. Median=5. If even count, average the two middle values. Mode: Count frequency of each value. The value(s) appearing most often is the mode. If all values appear equally, there is no mode.
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