Statistics Calculator: Mean, Median, Variance and Standard Deviation
Use Statistics Calculator online for your needs
Performing complex mathematical analyses can quickly become time-consuming, while often raising legitimate questions about the security and processing of your sensitive data. Our free statistics calculator offers a 100% client-side solution, executing all calculations directly in your browser without any interaction with our servers. You benefit from rigorous precision, including variance and standard deviation management, with zero data storage. Ensure the total confidentiality of your figures with a powerful tool, designed for the rigor of professionals and the simplicity of students.
How to calculate descriptive statistics?
Descriptive statistics summarize and analyze a numerical dataset through key indicators: central tendency (mean, median, mode), dispersion (variance, standard deviation, range) and distribution (quartiles, IQR). This calculator handles series of 2 to 1,000 values.
Mean, median and mode
The arithmetic mean (μ) is the sum of values divided by their count. The median is the central value that splits the ordered series into two equal halves. The mode is the most frequent value. These three indicators characterize the central tendency of a series.
Standard deviation and variance
Variance (σ²) measures the dispersion of values around the mean: σ² = Σ(xᵢ−μ)²/n. Standard deviation (σ) is the square root of variance. The larger σ, the more spread out the data. IQR (interquartile range = Q3−Q1) measures the spread of the central 50%.
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