Statistics Calculators
Mean, median, mode, standard deviation, z-score, and combinatorics.
Mean Calculator
Calculate the arithmetic mean (average) of a data set.…
Median Calculator
Find the median (middle value) of a data set, even or odd count.…
Mode Calculator
Find the mode(s) — most frequently occurring value(s) in a data set.…
Standard Deviation Calculator
Calculate population and sample standard deviation and variance.…
Variance Calculator
Calculate population and sample variance from a data set.…
Probability Calculator
Calculate basic, compound (AND/OR), and conditional probabilities.…
Z Score Calculator
Calculate the z-score and percentile of a value in a normal distribution.…
Normal Distribution Calculator
Calculate PDF, CDF, and probabilities for a normal distribution.…
Binomial Distribution Calculator
Calculate binomial probabilities P(X=k), P(X≤k), mean, and variance.…
Permutation Calculator
Calculate nPr — ordered arrangements of r items from n.…
Combination Calculator
Calculate nCr — unordered selections of r items from n.…
Confidence Interval Calculator
Calculate confidence intervals for a population mean.…
Sample Size Calculator
Calculate the minimum sample size for a survey or study.…
Correlation Coefficient Calculator
Calculate Pearson r correlation coefficient from two data sets.…
Regression Calculator
Calculate linear regression equation, slope, intercept, R², and make predictions.…
About Statistics Calculators
Our statistics calculators provide accurate, instant results with clear step-by-step explanations. Whether you're a student, professional, or just curious, these tools help you get the right answer fast.
All results are for informational purposes only. Please consult a qualified professional for critical decisions.