How to use this calculator

Variance measures spread in squared units. Sample variance uses Bessel’s correction.

The method

Variance = average squared distance from the mean

Enter your values in the labeled fields and choose Calculate. The result panel shows the answer and supporting values when useful.

WORKED EXAMPLE INPUT

Numbers: 4, 7, 9, 10, 12, Variance type: sample

Select Calculate to evaluate these example values.

Scope and limitations

At least two values are required for sample variance.

Common questions

Can I use different units?

Use consistent units unless this page is a unit converter. The result follows the units implied by the inputs.

Are results exact?

Displayed values may be rounded. Keep extra precision for important follow-up calculations.

Methods & verification

Formulas use standard mathematical definitions and fixed unit factors where applicable. See our methodology for numerical conventions, rounding, privacy, and limitations.