Why is variance shown in squared units?
Variance squares the distance from the mean, so the unit is squared. The calculator also shows standard deviation to bring it back to the original scale.
Step-by-step walkthrough
Variance Calculator Guide
Use this companion guide beside the interactive calculator to make sure you understand the “why” behind every click. Each section includes the classroom explanation, student-friendly language, and quick practice prompts.
Before you start
Collect the data points listed below and double-check their units. Keeping an organized “givens” list is one of the fastest ways to reduce math errors and impress exam graders.
- variance
- spread
- standard deviation
Detailed procedure
Step 1
Paste or type values separated by commas or spaces.
Step 2
Pick sample or population mode depending on your dataset.
Step 3
Review variance and standard deviation results with the same units squared.
Teaching & troubleshooting tips
Can I export the results?
Copy the displayed values directly—everything is formatted for quick pasting into reports or spreadsheets.