Math Calculators · cluster
Free Statistics & Probability Calculators
Describing data and quantifying uncertainty.
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24 calculators in this cluster
Free Statistics Calculator
Mean, median, mode, range, variance, and standard deviation.
Free Probability Calculator
P(A ∪ B), P(A ∩ B), and conditional probability from two events.
Free Permutation and Combination Calculator
Count ordered permutations P(n,r) and unordered combinations C(n,r).
Free Random Number Generator
Uniformly random integers or decimals in any range.
Free Average Calculator
Mean of a list of numbers, plus sum and count.
Free Combination Calculator
nCr combinations and nPr permutations.
Free Binomial Probability Calculator
Probability of exactly k successes in n trials.
Free Coin Flip Probability Calculator
Chance of getting exactly k heads in n flips.
Free Confidence Interval Calculator
Confidence interval for a sample mean.
Free Correlation Coefficient Calculator
Pearson's r between two paired data sets.
Free Dice Probability Calculator
Odds of a target sum when rolling multiple dice.
Free Expected Value Calculator
Average outcome of a probabilistic bet or event, over the long run.
Free Linear Regression Calculator
Best-fit line (y = mx + b) through paired data.
Free Margin of Error Calculator
Margin of error for a survey proportion.
Free Mean, Median & Mode Calculator
Central tendency of a data set: mean, median and mode.
Free Normal Distribution Probability Calculator
Probability that X falls below, above or between values.
Free Percentile Calculator
Find the percentile rank of a value in a data set.
Free Poisson Distribution Calculator
Probability of k events given an average rate λ.
Free Quartiles & IQR Calculator
Q1, median, Q3 and interquartile range with outlier bounds.
Free Sample Size Calculator
Minimum sample size needed for a survey.
Free Standard Deviation Calculator
Sample and population standard deviation and variance.
Free Variance Calculator
Sample and population variance of a data set.
Free Weighted Average Calculator
Average of values weighted by importance.
Free Z-Score Calculator
How many standard deviations a value is from the mean.
Concepts you'll meet here
Related clusters in math calculators
Free Algebra & Equations Calculators
Solving for unknowns and manipulating expressions.
Free Geometry & Shapes Calculators
Length, area, volume and angle in two and three dimensions.
Free Number Tools & Notation Calculators
Bases, factors, rounding and precision.
Free Academic & Grades Calculators
Weighted averages applied to education.