Standard Deviation Calculator
Standard Deviation Calculator is free to use. Enter your figures below and the result updates as you type. Use it for planning; it is an estimate, not advice.
About the Standard Deviation Calculator
Sample standard deviation = √(Σ(x − mean)² ÷ (n − 1)). Population uses n instead of n − 1.
A small standard deviation means values sit close to the mean. Use the sample form for survey data.
How to use the Standard Deviation Calculator
- Enter each figure in the boxes above, using the same currency and time units.
- The result updates as you type. Press Calculate to refresh it at any time.
- Change one figure at a time to see how much it moves the result.
Frequently asked questions
What is the Standard Deviation Calculator used for?
A small standard deviation means values sit close to the mean. Use the sample form for survey data.
How accurate is the Standard Deviation Calculator?
It applies standard formulas to the figures you enter. Real results depend on actual rates, fees, taxes and timing, so treat the output as an estimate and confirm with your bank or adviser.
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