Variance & Standard Deviation
Measure the spread of data points around the mean.
- Free Online Tool
- Instant Results
- Mobile Friendly
- No Installation
- Secure & Private
Result
Understanding This Calculator
Variance Formula (Sample)
Average squared deviation from the mean.
s² = Σ (x - x̄)² / (n - 1)
- Standard Deviation s = √(Variance)
Example 1
Data: 2, 4, 6 (Mean=4)
- Deviations: -2, 0, 2
- Squared: 4, 0, 4 (Sum=8)
- Variance = 8 / (3-1) = 4
- Std Dev = √4 = 2
How to Use
- Enter your dataset as comma-separated numbers.
Frequently Asked Questions
How do I use the Variance & Std Dev Calculator?
Enter your values in the input fields, and the result will appear instantly.
Is this calculator free to use?
Yes, this calculator is 100% free and does not require any registration or subscription.
Is it mobile-friendly?
Absolutely! Our tool is optimized for all devices, including mobile phones, tablets, and desktop computers.