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.
When to use this tool
This tool is designed for quick, practical tasks such as everyday calculations, data formatting, or simple conversions. It is best used when you need fast results without installing software or using complex tools.
When to use
- Quick checks or one-time calculations
- Validating or converting data before using it elsewhere
- Simple tasks that do not require advanced software
When not to use
- Critical financial, legal, or medical decisions
- Large-scale or automated processing
- Situations requiring guaranteed precision beyond basic validation
Always review results before using them in important contexts.
About this tool
This tool helps you perform quick utility operations directly in your browser. It runs entirely in your browser without sending data to a server.
You can use this tool when handling simple tasks without installing additional software. The results should be interpreted as a processed output based on your input data.
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.