Skewness Calculator
Calculate sample skewness from a dataset to estimate whether the distribution is left-skewed, right-skewed, or roughly symmetric.
Enter values separated by commas, spaces, or line breaks.
This page returns sample skewness based on the dataset mean and sample standard deviation.
| Metric | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
Skewness is based on the third standardized moment of the sample. It indicates whether a dataset leans left, leans right, or appears roughly symmetric.
Examples
- 2, 3, 3, 4, 5, 9 is often right-skewed because of the larger upper tail.
- Skewness near 0 suggests approximate symmetry.
FAQ
- What is skewness?
Skewness measures asymmetry in a dataset. Positive skew means a longer right tail, and negative skew means a longer left tail.
- What formula does this calculator use?
It uses a sample skewness formula based on standardized third moments with a small-sample adjustment.
- How many values are required?
At least 3 values are required, and the standard deviation must be greater than 0.
- What does skewness near 0 mean?
It suggests the data is roughly symmetric, though not perfectly.
- Are calculations stored?
No. Everything runs locally in your browser.