Statistics Calculator
Descriptive statistics, histogram, z-scores & percentile lookup — paste any dataset and get instant insights
Enter your dataset to begin
Paste numbers in the sidebar separated by commas, spaces, or newlines. Supports any size dataset.
Understanding the Statistics
Sample vs Population
Use Sample when your data is a subset of a larger group (divides by n−1). Use Population when you have the complete dataset (divides by n). The sample formula corrects for bias in estimating the true standard deviation.
What is Standard Deviation?
Standard deviation measures how spread out values are from the mean. A low std dev means values are close to the average; a high std dev means they are widely scattered. About 68% of values fall within ±1 std dev in a normal distribution.
Skewness & Kurtosis
Skewness describes asymmetry: positive means a longer right tail, negative means a longer left tail. Kurtosis (excess) describes tail heaviness: positive means heavier tails than a normal distribution; negative means lighter tails.