Statistics Calculators
Free statistics calculators and tables: Descriptive statistics, probability, hypothesis tests, standard deviation, z-scores, p-values, confidence intervals, statistical tables, z, t, chi-square and F tables, with the step-by-step working.
- ANOVA Calculator (One-Way)Compare the means of three or more groups with a one-way ANOVA, with the full ANOVA table.
- Bar Chart Maker (Vertical and Horizontal)Turn a list of labels and values into a bar chart you can download.
- Bell Curve Generator (Normal Distribution Graph)Draw a bell curve for any mean and standard deviation, and download the graph.
- Box Plot Maker (Box and Whisker Plot)Draw a box plot from your data, with the five-number summary and outliers.
- Chi-Square Test Calculator (Independence and Goodness of Fit)Run a chi-square test on a table of counts, with expected counts, residuals and an APA sentence.
- Confidence Interval CalculatorFind the margin of error and the confidence interval for a mean.
- Correlation Coefficient Calculator (Pearson and Spearman)Find the correlation between two sets of values, with the p-value and strength.
- Fisher’s Exact Test Calculator (2×2)Test a 2 x 2 table of counts exactly, including small samples.
- Histogram Maker (with Frequency Table)Paste your data to draw a histogram and a frequency table.
- Kruskal-Wallis Test CalculatorCompare three or more groups without assuming normality, with a rank summary.
- Linear Regression CalculatorFit a straight line to your data and predict y for any x, with the full working.
- Mann-Whitney U Test CalculatorCompare two independent groups without assuming normality, with an exact p-value for small samples.
- Mean, Median, Mode and Range CalculatorPaste a list of numbers and get the median, mean (average), mode and range instantly.
- Normal Distribution Calculator (with Graph)Find normal probabilities and percentiles, with the shaded bell curve.
- P-Value CalculatorConvert a z-score or t-statistic into a p-value, for one or two tails.
- Permutation and Combination CalculatorWork out nPr and nCr: how many ways to arrange or choose items.
- Pie Chart Maker (with Percentages)Turn a list of labels and values into a pie chart with percentages.
- Probability CalculatorWork out the probability of two events, or the chance of exactly k successes in repeated trials (binomial).
- Proportion Z-Test Calculator (One and Two Proportions)Run a one- or two-proportion z-test from counts, with the p-value and confidence interval.
- Sample Size CalculatorWork out the sample size you need for a survey or an experiment.
- Scatter Plot Maker (with Line of Best Fit)Plot your data as a scatter plot and add a line of best fit.
- Shapiro-Wilk Normality Test CalculatorCheck whether your data are normal, with W and the p-value.
- Standard Deviation CalculatorMeasure how spread out your numbers are, for a sample or a whole population, with the steps shown.
- Statistics CalculatorGet a full set of descriptive statistics from a list of numbers, including outliers.
- T-Test Calculator (One-Sample, Two-Sample, Paired)Run a t-test from raw data or summary statistics, with the working and an APA sentence.
- Tukey HSD Calculator (Post-Hoc Test)Find which pairs of groups differ after a significant ANOVA.
- Wilcoxon Signed-Rank Test CalculatorTest paired or single-sample data without assuming normality.
- Z-Score CalculatorFind how many standard deviations a value is from the mean, and its percentile.