Free Variance Calculator (Sample s² & Population σ²) Online
Calculate sample variance (s²), population variance (σ²), sum of squared deviations (SS), and degrees of freedom for statistical analysis. — 100% free online utility, zero sign-up, zero paywalls, and private client-side processing.
How It Works
Enter Numbers
Input dataset separated by commas or spaces.
Select Variance Type
Choose Sample (divided by n - 1) or Population (divided by N).
Inspect Steps
Review deviation from mean (x - μ) for each data point.
Frequently Asked Questions
Related Math & Science Calculators & Utilities
Interlinked precision tools in the Math & Science collection.
Standard Deviation & Variance Calculator (Sample & Population)
Calculate Population (σ) and Sample (s) Standard Deviation, Variance, Mean, Sum of Squares, and Margin of Error for any numeric dataset.
Mean, Median, Mode & Range Calculator
Calculate central tendency metrics: Arithmetic Mean, Median, Mode, Range, Quartiles, and Interquartile Range (IQR) for any dataset.
Z-Score & Normal Distribution Probability Calculator
Calculate Z-scores (standard score z = (x - μ) / σ), percentile ranks, and cumulative normal distribution probability P(Z < z).
Scientific Calculator (Trigonometry, Logarithms & Powers)
High-precision scientific calculator supporting sine, cosine, tangent, natural log (ln), exponential powers, square roots, and radian/degree modes.
Quadratic Equation Solver (Real & Complex Roots with Steps)
Solve any quadratic equation ax² + bx + c = 0 instantly. Computes discriminant (b² - 4ac), real roots, and complex imaginary roots with full steps.
Permutations & Combinations Calculator (nPr & nCr)
Calculate combinations nCr (order does not matter) and permutations nPr (order matters) with full factorials and step-by-step breakdown.