Standard Deviation Calculator
Calculate the population and sample standard deviation, variance and mean of a data set.
Population vs sample
Population ฯ divides by N; sample ฯ divides by N โ 1 (Bessel's correction). Use sample ฯ if your data is a subset of a larger group.
Frequently Asked Questions
Is the Standard Deviation Calculator free to use?
Yes, the Standard Deviation Calculator is 100% free to use. There are no subscriptions, no sign-ups, and no hidden fees.
Is my data safe when using the Standard Deviation Calculator?
Absolutely. All calculations performed by the Standard Deviation Calculator happen locally in your web browser. We do not store, track, or transmit your inputs or results to any server.
How accurate is the Standard Deviation Calculator?
Our Standard Deviation Calculator uses industry-standard formulas and methodology. You can view the exact formula and calculation logic used in the methodology section above to verify the math yourself.
Can I use the Standard Deviation Calculator on my mobile phone?
Yes! The Standard Deviation Calculator is fully responsive and works seamlessly on all devices including smartphones, tablets, and desktop computers.