Explanation

What is Standard Deviation?

Standard deviation shows how spread out values are around the mean.

What this calculator does

Compute standard deviation for a list of numbers.

Inputs you need

• Values (comma or space separated)
• Type
• Sample
• Population

Formula

• Mean: sum(x)/n
• Population SD: sqrt(sum((x-mean)^2)/n)
• Sample SD: sqrt(sum((x-mean)^2)/(n-1))

Example

For 4,8,6,5,3 (sample):

• Mean = 5.2
• SD ≈ 1.92

Quick input set you can try:

• Values (comma or space separated): 4, 8, 6, 5, 3
• Type: 1
• Sample: 1
• Population: 1

FAQ

1) What does this calculator help with? It helps you calculate Standard Deviation quickly and with consistent formulas.

2) Which formula is used? It uses the standard method shown in the formula section on this page.

3) Can I use decimal values? Yes. Decimal values are supported for most numeric fields.

4) Should I rely on this for final decisions? Use it as a practical estimate, and verify critical decisions with official documents or expert advice.