σ μ Σ χ² ∞ π

Online Statistics Calculator for Mean, Median, Standard Deviation & More

Calculate mean, median, mode, standard deviation, and more with our free online statistics calculator. Fast, accurate, and easy to use for students and professionals worldwide.

Built For Researchers

Accuracy 99.9%

Live Statistical Analysis

Mean (μ) 85.42

Median 87.00

Std Dev (σ) 12.36

Variance 152.77

Z-Score 1.24

P-Value 0.023

Statistical Calculators

Choose Your Analysis Tool

Check out our wide range of statistical calculators. Each tool uses well-known mathematical formulas and algorithms to get the right answers.

Sample Size Calculator

Work out how many responses a survey needs, or how many users an A/B test needs to detect a lift, with dropout and finite population built in.

Z-Score Calculator

Convert a raw score to a z-score and percentile, find the cutoff for any percentile, compare scores from two tests, or score a whole list with outlier flags.

Linear Regression Calculator

Fit a least squares line to paired data, read the slope and intercept, check R² against the residual plot, and predict new values with an extrapolation warning.

P-Value Calculator

Get an exact p-value from a z, t, chi-square, or F statistic with its degrees of freedom, tail choice, and the call at your alpha level.

Probability Calculator

Enter a one-try chance as 1 in 6, 17%, or 0.17, set how many tries, and read the odds of it landing at least once, exactly k times, or never.

Mean Calculator

Calculate arithmetic mean (average) of numbers online. Free statistical calculator for finding mean values with step-by-step solutions.

Median Calculator

Calculate median value online. Free statistical calculator to find the middle value in your dataset with step-by-step calculations.

Mode Calculator

Calculate mode (most frequent value) online. Free statistical calculator to find the mode in your dataset with frequency analysis.

Standard Deviation Calculator

Get sample and population standard deviation, variance, and mean from a pasted list, with the working shown line by line underneath it.

Variance Calculator

Free online variance calculator to compute sample variance, population variance, and standard deviation for statistical analysis.

Correlation Calculator

Calculate correlation coefficients online. Free Pearson correlation calculator with scatter plots, significance testing, and detailed statistical analysis.

Normal Distribution Calculator

Free online normal distribution calculator to compute probabilities, percentiles, and critical values for the bell curve.

T-Test Calculator

Run one-sample and two-sample t-tests, with the statistic, degrees of freedom, and p-value reported. Paired and unpaired cases are handled.

Chi-Square Test Calculator

Calculate chi-square test statistic online. Free statistical calculator for independence tests and goodness of fit with p-value calculation.

ANOVA Calculator

Calculate ANOVA analysis of variance online. Free one-way ANOVA calculator with F-statistic, p-value, and detailed statistical analysis.

Confidence Interval Calculator

Calculate confidence intervals online. Free statistical calculator for mean confidence intervals with Z and T distributions.

Poisson Distribution Calculator

Work out Poisson probabilities for rare events, with PMF, CDF, and a table. The model assumes events arrive independently at a fixed rate.

Gaussian Random Number Generator

Generate Gaussian random numbers online. Free normal distribution random number generator with customizable mean and standard deviation.

Uniform Random Generator

Generate uniform random numbers with customizable range and precision. Free online tool for statistical sampling, simulations, and random data generation.

Exponential Distribution Calculator

Calculate exponential distribution probabilities online. Free exponential calculator for reliability analysis, survival analysis, and waiting time modeling.

Poisson Distribution Generator

Generate Poisson distributed random numbers at a rate you set, with the sample statistics shown. Built for queue models and rare event studies.

Binomial Distribution Generator

Generate binomial distributed random numbers online. Free binomial random number generator with trials, probability, and statistical analysis.

Monte Carlo Simulator

Run Monte Carlo simulations with your own distribution and trial count, then read the spread of outcomes. More trials narrow the estimate slowly.

Why Choose Our Statistics Calculators?

Statistics is what makes data-driven decision making possible. Our full toolkit makes complicated statistical tasks easy to understand and use, and professionals in many fields trust them.

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Descriptive Statistics Calculate mean, median, mode, variance, and standard deviation with comprehensive data summaries.
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Probability Distributions Work with normal, binomial, Poisson, and exponential distributions for probability analysis.
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Hypothesis Testing Perform t-tests, chi-square tests, and ANOVA for rigorous statistical significance testing.
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Correlation & Regression Measure variable relationships and build predictive models with regression analysis.

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Research

Academic and scientific research requiring rigorous statistical validation and analysis.

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Business Analytics

Data-driven business decisions powered by statistical insights and forecasting.

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Education

Learning and teaching statistics with interactive calculators and visualizations.

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Healthcare

Clinical trials, epidemiology, and medical research statistical analysis.

Privacy-First Processing: All statistical calculations run entirely in your browser. Your data never leaves your device, ensuring complete privacy and security for sensitive research and business data.