Sample Variance Calculator
Calculate sample variance, sample standard deviation, mean, and dataset size from a list of values using the sample formula.
Enter values separated by commas, spaces, or line breaks.
Formula:
s² = Σ(x − x̄)² / (n − 1)
| Metric | Value |
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Privacy: calculations run locally in your browser. No inputs are stored or transmitted.
How it works
Sample variance is used when the dataset represents a sample rather than the entire population. This is why the denominator is n − 1 instead of n.
Examples
- 12, 15, 18, 21, 24
- This page returns sample mean, sample variance, and sample standard deviation.
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 sample variance?
Sample variance measures spread in sample data and divides the sum of squared deviations by n − 1.
- What formula does this calculator use?
It uses sample variance: s² = Σ(x − x̄)² / (n − 1).
- Why divide by n − 1?
Dividing by n − 1 provides an unbiased estimate of population variance from a sample in many common settings.
- How many values do I need?
At least 2 numeric values are required.
- Are calculations stored?
No. Everything runs locally in your browser.