Statistics Calculator

How to Use This Tool

1. Enter your data — type or paste numbers separated by commas, spaces, or line breaks into the data input area, or load one of the built-in sample data sets.
2. Click Calculate Statistics — get a full summary including mean, median, mode, standard deviation, variance, range, quartiles, skewness, and kurtosis.
3. Explore the visualizations — view your data as a histogram, box plot, or normal distribution comparison chart.
4. Save or load data — save your current data set to local storage or load a previously saved set for comparison.

Common Use Cases

• What is the average and spread of my data set? Enter your numbers to instantly see the mean, median, standard deviation, and variance.
• Is my data normally distributed? Check the skewness, kurtosis values, and the normal distribution comparison chart to assess normality.
• How do I find outliers in my data? The box plot visualization and quartile calculations (IQR method) help identify values outside the typical range.
• What are the percentiles and quartiles for my test scores? View Q1, Q2 (median), Q3, and the interquartile range in the results summary.
• How do I compare two data sets side by side? Save one data set, enter the second, calculate both, and compare the summary statistics.