SHAPES, DATA, AND SCHOOL MATH
Calculate mean, variance, and standard deviation from comma-separated data using either population or sample rules.
Your result
Enter your values and select Calculate. Your result stays on this device.
Standard deviation is the square root of the mean squared deviation; sample variance divides by n − 1.
Values are unweighted. Choose population or sample based on how the data was collected.
This standard deviation calculator keeps the population-versus-sample choice explicit. It returns the mean and variance alongside the standard deviation so students can check each stage.
Use case
Enter a comma-separated data set and compare standard deviation, variance, mean, count, and the selected n or n − 1 method.
Calculate spread for a data set while explicitly choosing the sample or population convention.
Build a reliable scenario
Standard Deviation Calculator helps you check a specific geometry & statistics question with figures that apply to you. Calculate mean, variance, and standard deviation from comma-separated data using either population or sample rules. Enter a comma-separated data set and compare standard deviation, variance, mean, count, and the selected n or n − 1 method. Calculate spread for a data set while explicitly choosing the sample or population convention. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
Prepare Numbers and Data type. Paste the comma-separated values. Choose population when the list is the full group or sample when it represents a larger group. Calculate the standard deviation and variance. Compare the result with your course convention and rounding rules. Keep units, dates, currency, and time periods consistent.
The stated method is: Standard deviation is the square root of the mean squared deviation; sample variance divides by n − 1. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
Values are unweighted. Choose population or sample based on how the data was collected. Check the input and rounding, then calculate again.
Method and update
Last reviewed: 2026-08-22. This tool performs the stated formula locally in your browser using the values you enter.
It measures how far values typically spread from the mean.
Use the sample form when the observations are a sample used to estimate variation in a larger population.
The n − 1 divisor is the conventional correction used when estimating population variance from a sample.
Keep exploring
Clear calculation guide
This free Standard Deviation Calculator keeps the values and the calculation method visible instead of returning an unexplained number. Calculate mean, variance, and standard deviation from comma-separated data using either population or sample rules. Use it to check a scenario with the figures that apply to you.
Start by checking units, dates, decimal places, and the option you selected. This standard deviation calculator keeps the population-versus-sample choice explicit. It returns the mean and variance alongside the standard deviation so students can check each stage. The stated mathematical method is: Standard deviation is the square root of the mean squared deviation; sample variance divides by n − 1.
Change one assumption at a time to understand what moves the result, then keep any final record or institution-specific rule separate from the arithmetic. Values are unweighted. Choose population or sample based on how the data was collected. Hesaplayın is a clear, browser-based calculator for checking the maths behind your decision.