Standard Deviation Calculator - Free Online | FunToolX

Enter a set of data (separated by commas or spaces), and the tool calculates: mean (arithmetic mean), median (sorted median), mode (most frequently occurring value), variance (degree of dispersion of the data), standard deviation (square root of variance).

Standard deviation formula: σ = √(∑ (xi - μ)² / N). The denominator of the sample standard deviation is N-1 (Bessel correction) and the denominator of the overall standard deviation is N. The tool automatically distinguishes and displays two results.

The smaller the standard deviation, the more concentrated the data, and the larger the more scattered the data. Measure risk in finance, measure consistency in quality control, and measure achievement distribution in education. The tool displays calculation steps to help understand.

Standard deviation calculator, which inputs a set of data to calculate statistics such as standard deviation, variance, mean, median, etc., supporting both sample and population models.