Calculator
Enter your data
Sample formula: s = sqrt(sum((x - mean)^2) / (n - 1))
Use sample mode when your values are a subset of a larger population. Use population mode only when the full population is represented in the data you entered.
Apps / Statistics
Standard Deviation Calculator
Enter numeric values from your data set, then calculate the standard deviation, mean, variance, and record count instantly. The calculator defaults to sample standard deviation, which is usually the right choice when you are analyzing data taken from a larger population.
Instructions
How to use this app
- Enter your numeric values in the data box. Separate them with commas, spaces, or line breaks.
- Leave the calculator in Sample standard deviation mode if your data is a sample taken from a larger population.
- Switch to Population standard deviation only if the data entered represents the complete population.
- Click `Calculate` to update the mean, variance, standard deviation, and calculation breakdown.
- Use `Reset` to reload the example values and start over.
Example: if you measured six cycle times from a production line and want to understand how much they vary, paste those six values into the box and keep the calculator on sample mode.
This app accepts whole numbers and decimals, including negative values if your data set requires them.