Pevlika

Standard Deviation Calculator

Measure how spread out your numbers are.

Runs in your browser — nothing is uploaded

—

Formula

s = √( Σ(x − x̄)² ÷ (n − 1) )

For a population, divide by n instead of n − 1. Roughly 68% of normally distributed values fall within one standard deviation of the mean.

How to use Standard Deviation Calculator

  1. Paste or type numbers separated by commas, spaces or new lines.
  2. Read the results instantly.
Statistics CalculatorMean, median, mode, standard deviation, variance and quartiles of a list. Percentage CalculatorWork out percentages, percentage change, and what percent one number is of another. Probability CalculatorProbability of A and B, A or B, complements and repeated trials. Grade CalculatorWeighted course grade — and the score you need on the final exam.