Statistics & Data Calculators
Descriptives, distributions, regression, tests and sample size.
20 calculators in this category.
Averages
- Geometric Mean Calculator — Calculate the geometric mean, the correct average for growth rates and ratios.
- Harmonic Mean Calculator — Calculate the harmonic mean, the correct average for rates and speeds.
- Standard Error Calculator — Calculate the standard error of the mean and its confidence interval.
Distributions
- Exponential Distribution Calculator — Find probabilities for waiting times between events.
- Normal Distribution Calculator — Find probabilities and z-scores for any normal distribution.
- Poisson Distribution Calculator — Find the probability of a number of events in a fixed interval.
More statistics & data calculators
- Binomial Probability Calculator — Find the probability of a number of successes in a fixed number of trials.
- Chi-Square Calculator — Run a chi-square goodness-of-fit test on observed versus expected counts.
- Coefficient of Variation Calculator — Compare relative variability between data sets with different units or scales.
- Confidence Interval Calculator — Build a confidence interval for a mean or a proportion.
- Correlation Coefficient Calculator — Calculate Pearson correlation between two variables, with significance testing.
- Covariance Calculator — Calculate sample and population covariance between two variables.
- Interquartile Range Calculator — Find the quartiles and interquartile range of a data set, and flag outliers using the 1.5 × IQR rule.
- Linear Regression Calculator — Fit a least-squares line, with slope, intercept, r² and prediction.
- Margin of Error Calculator — Calculate the margin of error for a survey result.
- Percentile Calculator — Find any percentile of a data set, or the percentile rank of a value.
- Quartile Calculator — Find Q1, Q2, Q3, the interquartile range and any outliers.
- Sample Size Calculator — Find the sample size needed for a target margin of error.
- T-Test Calculator — Run a one-sample or two-sample t-test and get the p-value.
- Z-Score Calculator — Convert a value to a z-score and find its percentile in a normal distribution.