Standard Deviation Calculator

Calculate standard deviation, variance, and comprehensive statistical analysis for your data set. Enter your numbers and get detailed insights including confidence intervals and distribution analysis.

Sample data: | |

Understanding Standard Deviation

What is Standard Deviation?

Standard deviation measures the spread of data around the mean. A low standard deviation indicates that data points tend to be close to the mean, while a high standard deviation indicates greater variability.

Population vs Sample

  • Population: Use when you have data for the entire group
  • Sample: Use when you have data from a subset of the population

Quick Tip: Standard deviation is widely used in finance, research, quality control, and data analysis to understand data variability.

Common Applications

Research & Analysis

  • โ€ข Quality control in manufacturing
  • โ€ข Financial risk assessment
  • โ€ข Scientific research analysis
  • โ€ข Educational testing and grading

Practical Uses

  • โ€ข Weather forecasting
  • โ€ข Medical studies and trials
  • โ€ข Market research and surveys
  • โ€ข Performance metrics tracking