Standard Deviation Calculator – Understand Your Data Instantly

Use this free online Standard Deviation Calculator to quickly find out how spread out your data is. It’s perfect for students, researchers, analysts, and anyone working with statistics. Enter a list of numbers (comma or space separated), and choose whether you want to calculate for a sample or a population.

Why Use a Standard Deviation Calculator?

Standard deviation tells you how spread out your data is. A low standard deviation means your data points are close to the mean, while a high standard deviation shows greater variability.

Where It’s Used:

• Education: Analyze test score dispersion
• Finance: Evaluate investment risk
• Science: Assess data reliability
• Business: Forecast product demand

FAQs

Q: Can I use decimals or negative numbers?
A: Yes, this calculator supports any real numbers.

Q: What’s the difference between sample and population standard deviation?
A: Sample uses n – 1 in the denominator, population uses n.

Q: Do I need to log in?
A: Nope! It’s 100% free and instant.