Statistics
Binomial Distribution Calculator
Calculate exact, cumulative, at-least, and between probabilities.
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Statistics Calculators
Understand probability and compare your data.
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Statistics
Cohen's d Calculator
Calculate a signed independent-group effect size using pooled standard deviation.
Statistics
Mean, Median & Mode Calculator
Find common measures of center for a list of numbers.
Statistics
Variance Calculator
Calculate population or sample variance for a data set.
Statistics
Standard Deviation Calculator
Calculate sample or population standard deviation.
Statistics
Z-Score Calculator
Standardize a value using a mean and standard deviation.
Statistics
Coefficient of Variation Calculator
Compare standard deviation with the magnitude of the mean.
Statistics
Probability of A or B Calculator
Calculate P(A ∪ B) when P(A), P(B), and their overlap are known.
Statistics
Independent Probability Calculator
Calculate the probability that two independent events both occur.
Statistics
Correlation Coefficient Calculator
Calculate Pearson’s r from paired x and y values.
Statistics
Median Calculator
Find the middle value of a numeric data set.
Statistics
Mode Calculator
Find the most frequently occurring value or values.
Statistics
Range Calculator
Find the minimum, maximum, and range of a data set.
Statistics
Quartile and IQR Calculator
Find Q1, median, Q3, and the interquartile range.
Statistics
Percentile Calculator
Estimate a percentile value from a data set using linear interpolation.
Statistics
Percentile Rank Calculator
Estimate the percentage of observations at or below a chosen value.
Statistics
Standard Error Calculator
Estimate the standard error of the sample mean from raw observations.
Statistics
Mean Confidence Interval Calculator
Build a z-based confidence interval for a mean from mean, known standard deviation, and sample size.
Statistics
Expected Value Calculator
Calculate the weighted expected value of discrete outcomes.
Statistics
Linear Regression Calculator
Fit a least-squares line y = mx + b to paired data.
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