Statistics Calculators
What are the chances of winning the lottery? What is the risk of doing this? How many times do I have to roll a dice to get the number I want? All these questions are statistics problems. We provide simple statistics calculators to help you make better decisions and solve problems faster. From the odds calculator to the probability calculator, you’ll always find a useful tool in our collection. So help us help you solve statistics problems, and you will learn something new and valuable. Who knows? Maybe you will learn how to convince your friends to bet for almost impossible things (that only you know are almost impossible ;))
Probability theory and odds calculators 🎲
- Accuracy CalculatorThe accuracy calculator is a simple tool for calculating accuracy using three simple methods.
- ANOVA CalculatorANOVA Calculator performs statistical analysis to identify significant differences between group means using one-way and two-way ANOVA.
- Bayes' Theorem CalculatorBayes' theorem calculator helps calculate conditional probabilities in accordance with Bayes' rule.
- Bertrand's Box ParadoxWhat is the chance of choosing the box containing only gold? Find the answer to Bertrand's box paradox with Omni!
- Bertrand's ParadoxBertrand's paradox is an intriguing warning for every scientist: dealing with infinity and randomness can lead to pitfalls!
- Birthday Paradox CalculatorThe birthday paradox calculator is a tool that enables you to determine the probability that at least two people from a group of a given size will share a birthday.
- Boy or Girl ParadoxThe boy or girl paradox is an excellent example of why how we ask questions matters!
- Chebyshev's Theorem CalculatorThe Chebyshev's theorem calculator counts the probability of an event being far from its expected value.
- Coin FlipperUse our coin flipper for a 50/50 chance of getting heads or tails. Our tool helps you make a decision and determine your choices randomly.
- Coin Flip Probability CalculatorCoin flip probability calculator lets you calculate the likelihood of obtaining a set number of heads when flipping a coin multiple times.
- Coin Toss Streak CalculatorWith this coin toss streak calculator, you will discover a very interesting problem in probability related to consecutive heads appearing in coin flips.
- Combination CalculatorUse the combinations calculator to determine the number of combinations for a set.
- Conditional Probability CalculatorUse the conditional probability calculator to determine the probability of an event conditional on another event.
- Confusion Matrix CalculatorOur confusion matrix calculator helps you to calculate all the metrics you need to assess the performance of your machine learning model.
- Dice Average CalculatorWith this dice average calculator, you can quickly calculate the average value of a set of dice rolls.
- Dice Probability CalculatorWith this dice probability calculator, you can easily find the various probabilities related to rolling a set of dice.
- Dice Roller CalculatorUse this dice roller calculator when you've lost the dice to your favorite board game. Throw up to 15 dice of twenty different types.
- Expected Value CalculatorUnlock the power of statistics with our expected value formula calculator. Learn how to calculate the expected value swiftly. Try it today!
- False Positive Paradox CalculatorDiscover why "accurate" tests can be misleading with this false positive paradox calculator.
- Implied Probability CalculatorOur implied probability calculator helps you to calculate the probability of an incident happening, given the odds.
- Joint Probability CalculatorOur joint probability calculator helps you compute the likelihood of multiple events occurring together.
- Lottery CalculatorThe lottery calculator finds the odds for winning in a typical lottery.
- Monty Hall Problem CalculatorThe Monty Hall Problem calculator can help you win a car 66% of the time — but only if you play the game!
- Odds CalculatorUse the odds calculator to convert odds to a probability of winning or losing.
- Parrondo's Paradox CalculatorLearn how two losing games can make a winning game by alternating between them in this Parrondo's paradox calculator.
- Password Combination CalculatorUse Omni's password combinations calculator to find how many possible combinations of numbers, letters, and symbols exist, given the length of a password.
- Permutation CalculatorUse the permutation calculator to determine the number of permutations in a set.
- P-Hat CalculatorUse this p-hat calculator to determine the sample proportion according to the number of occurrences of an event and the sample size.
- Post-Test Probability CalculatorThe post-test probability calculator allows you to calculate pre-test probability, likelihood ratios, and finally, the post-test probability itself.
- Probability CalculatorUse the probability calculator to find the likelihood of various interactions between two distinct events.
- Probability of 3 Events CalculatorThe probability of 3 events calculator determines the chances of three independent events occurring.
- Quiz: Dice Average CalculatorTest your knowledge of dice averages, expected values, and probability with our average dice quiz before rolling or designing your next game.
- Quiz: Lottery CalculatorUnderstand the math behind the millions. Test your probability skills to see if you are a certified jackpot genius!
- Random Number GeneratorNo more straining with the tossing of a coin and the rolling of dice — this random number generator will give you the figures you need.
- Relative Risk CalculatorUse the relative risk calculator to compare the probability of developing a disease in two groups of people.
- Risk CalculatorRisk calculator checks which of the two options is less risky based on the probability of failure and its consequences.
- Roulette Payout CalculatorFind your bet's odds and potential winnings with the roulette payout calculator!
- Sensitivity and Specificity CalculatorOur sensitivity and specificity calculator is a simple way to calculate all the values needed in medical statistics.
- Two Envelopes Paradox CalculatorThe two envelopes paradox calculator helps you determine whether swapping envelopes will make you obtain the envelope with a larger amount of money.
Distributions and plots calculators 🔔
- Benford's Law CalculatorBenford's law calculator allows you to verify if your data set follows Benford's distribution of leading digits.
- Beta Distribution CalculatorBeta distribution calculator can evaluate all things related to this famous family of probability distributions.
- Binomial Distribution CalculatorUse the binomial distribution calculator to calculate the probability of a certain number of successes in a sequence of experiments.
- Box Plot CalculatorThe box plot calculator is here to show you a graphic analysis of your dataset in the form of a box-and-whisker plot.
- Central Limit Theorem CalculatorThe central limit theorem calculator allows you to calculate the sample mean and the sample standard deviation for the given population distribution and sample size.
- Chi-Square CalculatorDetermine the goodness of fit of your data with the chi-square calculator.
- Class Width CalculatorCalculate the class width of any dataset.
- Confidence Interval CalculatorThe confidence interval calculator finds the confidence level for your data sample.
- Continuity Correction CalculatorThe continuity correction calculator shows you how to apply continuity correction to approximate a binomial distribution of a given problem.
- Dot Plot CalculatorMake your own dot plots with this dot plot calculator!
- Empirical Rule CalculatorThe empirical rule calculator allows you to find the three intervals within which you'll find 68, 95, and 99.7% of your data.
- Exponential Distribution CalculatorThe exponential distribution calculator finds out the probability of a certain amount of time elapsing between two events.
- Exponential Growth Prediction CalculatorThe exponential growth prediction calculator estimates a future value based on past performance.
- Frequency Distribution CalculatorThe frequency distribution calculator generates the cumulative frequency distribution table and a bar graph representing the frequency distribution for the given set of numbers.
- Frequency Polygon CalculatorThe frequency polygon calculator will help you create a frequency polygon for the given set of data points.
- Geometric Distribution CalculatorOur geometric distribution calculator will help you determine the probability of a certain number of trials needed for success.
- Histogram CalculatorThe histogram calculator is a histogram maker and a lesson on histograms, all in one. Let's explore what is a histogram, some examples, and the differences between a histogram vs a bar chart.
- Hypergeometric Distribution CalculatorUse the hypergeometric distribution calculator to find the probability (or cumulative probability) associated with the hypergeometric distribution.
- Inverse Normal Distribution CalculatorThe inverse normal distribution calculator finds the x-value and Z-score if you input the area, mean, and standard deviation of the normal distribution.
- Lognormal Distribution CalculatorOur lognormal distribution calculator helps you solve problems regarding probabilities, quantiles, samples, etc. from the lognormal distribution.
- Negative Binomial Distribution CalculatorThe negative binomial distribution calculator calculates what is the probability according to the Pascal distribution.
- Normal Distribution CalculatorEffortlessly calculate probabilities with our bell curve calculator, a perfect tool for any probability distribution analysis. Try it today!
- Normal Probability Calculator for Sampling DistributionsThe normal probability calculator for sampling distributions gives you the probability of finding a range of sample mean values.
- Pie Chart CalculatorUsing this pie chart calculator, you can compare values in different groups visually using a pie chart.
- Poisson Distribution CalculatorThe Poisson distribution calculator is a tool for determining the probability of a certain number of independent events happening in a given time.
- Rayleigh Distribution CalculatorOur Rayleigh distribution calculator helps you generate samples from the Rayleigh distribution, or determine probabilities, cdf, pdf, quantiles, and common measures in this distribution.
- Relative Frequency CalculatorOur relative frequency calculator can help you find the experimental probability for ungrouped and grouped data, as well as cumulative relative frequency.
- Sampling Distribution of the Sample Proportion CalculatorUse our sampling distribution of the sample proportion calculator to find the probability that your sample proportion falls within a range.
- SMp(x) Distribution CalculatorSMp(x) distribution calculator can generate a six-parameter probability function, which can simulate virtually every known probability distribution.
- Stem and Leaf Plot CalculatorConvert any given set of integers to a stemplot using this stem-and-leaf plot calculator!
- Uniform Distribution CalculatorThe uniform distribution calculator can perform all sorts of computations related to this popular probability distribution. Comes with free sample generator!
- Upper Control Limit CalculatorThe upper control limit calculator helps you determine the lower and upper control limit values of your dataset.
- Weibull Distribution CalculatorUse this Weibull distribution calculator if you need find probabilities, quantiles, etc. in the Weibull distribution, or generate samples from this distribution.
Descriptive statistics calculators 📊
- 5 Number Summary CalculatorThe 5 number summary calculator will give you the five most important statistical parameters of your dataset: minimum, first quartile, median, third quartile, and maximum.
- Average Rating CalculatorThe rating average calculator returns an average rating based on the number of 1-5 ratings.
- Coefficient of Variation CalculatorThe coefficient of variation calculator is a convenient way to describe the standard deviation as a percentage of the mean.
- Cohen's D CalculatorOur Cohen's D calculator can help you measure the standardized effect size between two data sets.
- Constant of Proportionality CalculatorOur constant of proportionality calculator can help you to calculate the ratio that relates two dependable given values.
- Correlation Coefficient CalculatorCorrelation coefficient calculator quickly finds the values of several different correlation coefficients. If you wish, it will show you the intermediate steps of the calculations as well!
- Correlation Coefficient Calculator (Matthews)The correlation coefficient calculator helps you determine the statistical significance of your data with the Matthews correlation formula.
- Covariance CalculatorCovariance calculator gives you the sample covariance for two equally sized samples, as well as an estimate of population covariance.
- Decile CalculatorUsing the decile calculator, you can divide your data into deciles in order to interpret them.
- Descriptive Statistics CalculatorThe descriptive statistics calculator will thoroughly analyze your data set using more than 20 different descriptive statistics spread over various subcategories of statistical measurements, such as central tendency and dispersion.
- Dispersion CalculatorThe dispersion calculator is a handy tool that calculates the spread of data using multiple measures like range, interquartile range, variance, and standard deviation.
- Error Propagation CalculatorThis error propagation calculator helps propagate the primary parameter(s)' error to the final parameter.
- Grouped Data Standard Deviation CalculatorUse the grouped data standard deviation calculator to find the mean, variance, and standard deviation of given data ranges.
- Index of Qualitative Variation CalculatorCalculate the index of qualitative variation easily with our tool, employing the IQV formula for accurate and fast analysis.
- IQR Calculator — Interquartile RangeThe IQR calculator allows you to find the interquartile range of up to 50 values.
- Least to Greatest CalculatorThe least to greatest calculator is here to put your numbers in ascending order, even if instead of specific values, you give it arithmetic expressions.
- Mean Absolute Deviation CalculatorThe mean absolute deviation calculator can calculate the mean absolute deviation around the mean, median, or any other statistically significant number.
- Mean Median Mode CalculatorThe mean median mode calculator tells you the mean, median, mode, range, and midrange of a dataset. We also show you all the steps!
- Median CalculatorThe median calculator allows you to calculate the median number of a dataset with up to 50 values.
- Median Absolute Deviation CalculatorThe median absolute deviation calculator can calculate the median absolute deviation of a data set of up to 50 points.
- Midrange CalculatorThe midrange calculator will quickly calculate the midrange of a given set of data.
- Minimum and Maximum CalculatorThe minimum and maximum calculator will quickly give you the smallest and largest values in your dataset of up to fifty entries.
- Mode CalculatorThe mode calculator finds the modal value for your dataset.
- MSE Calculator — Mean Squared ErrorThe MSE calculator can quickly find the mean squared error of your sample and provide you with intermediate calculations. SSE and RMSE are available as well!
- Outlier CalculatorThe outlier calculator is here to analyze your dataset of up to thirty entries and tell you if any of them are outliers, i.e., differ a lot from the others.
- Pearson Correlation CalculatorUse this Pearson correlation calculator to find Pearson's r of any given dataset, as well as a general oversight on what Pearson's correlation is all about.
- Percentile CalculatorThe percentile calculator is here to help you get the k-th percentile of a data set of up to 30 numbers.
- Percentile Rank CalculatorThis percentile rank calculator finds the percentile for any data value in a dataset that contains up to 30 numbers.
- Pooled Standard Deviation CalculatorOur pooled standard deviation calculator can help you measure the variability or spread of data when combining or pooling multiple datasets.
- Population Variance CalculatorUse the population variance calculator to estimate the variance of a given population from its sample.
- Process Capability Index CalculatorOur process capability index calculator helps you calculate whether the variation of your process is within specification limits and whether your process can produce the intended output.
- Quartile CalculatorThe quartile calculator is a simple tool to help you find the quartiles of your dataset (and some additional extra information).
- Quiz: Simpson’s Diversity Index CalculatorTry our quiz to test your understanding of Simpson’s diversity index and its real-world interpretation.
- Range CalculatorThe range calculator will quickly calculate the range of a given data set.
- Relative Standard Deviation CalculatorThe relative standard deviation calculator presents the standard deviation as a percentage of the mean.
- RSE Calculator — Relative Standard ErrorOur RSE calculator assists you in measuring estimate precision by calculating the ratio of the standard error to the mean.
- Simpson’s Diversity Index CalculatorEfficiently calculate diversity index and understand the Gini index formula with our Simpson's diversity index calculator. Try it today!
- Skewness CalculatorThis skewness calculator finds both the skewness and kurtosis of a dataset and interprets these values, telling you how skewed or peaked your distribution is.
- Spearman's Correlation CalculatorSpearman's correlation calculator can help you determine the value of this popular measure of rank association between two variables.
- Standard Deviation CalculatorThe standard deviation calculator tells you the mean and standard deviation of a dataset.
- Standard Deviation Index CalculatorHere you can find the standard deviation index calculator and its possible uses for your test model.
- Standard Deviation of Sample Mean CalculatorUse this tool to calculate the standard deviation of the sample mean, given the population standard deviation and the sample size.
- Standard Error CalculatorUse this standard error calculator whenever you need to find the standard error of the mean of any dataset with up to 30 numbers.
- Sum of Squares CalculatorUse this sum of squares calculator to determine the variability of your data.
- Upper and Lower Fence CalculatorThe upper and lower fence calculator determines the cutoff points for outliers in a dataset with up to 50 values.
- Variance CalculatorThe variance calculator finds the variance of a set of numbers. It is a measure of how tightly clustered the data is around the mean.
- Venn Diagram CalculatorDiscover the ultimate Venn diagram solver with our intuitive calculator. Effortlessly visualize complex data intersections and unions. Try it today!
Inference, regression, and statistical tests calculators 📉
- Absolute Uncertainty CalculatorFind how far the measured value may be from the real one using the absolute uncertainty calculator.
- AB Test CalculatorDetermine the statistical significance of your A/B tests effortlessly with our AB test calculator. Reliable, quick results. Start calculating now!
- Bonferroni Correction CalculatorOur Bonferroni correction calculator helps you adjust p-values to account for multiple comparisons.
- Coefficient of Determination Calculator (R-squared)This coefficient of determination calculator finds the R-squared of any bivariate dataset, and provides an interpretation as well!
- Critical Value CalculatorThe critical value calculator helps you find the one- and two-tailed critical values for the most widespread statistical tests.
- Cubic Regression CalculatorThis cubic regression calculator will help you determine the polynomial of degree 3 that best fits your two-dimensional dataset.
- Degrees of Freedom CalculatorThe degrees of freedom calculator finds the number of independent values in a data sample.
- Exponential Regression CalculatorThe exponential regression calculator helps you find the exponential curve that best models your dataset.
- Fisher's Exact Test CalculatorThe Fisher's exact test calculator performs a one-tailed and two-tailed Fisher's test on any given 2 x 2 contingency table.
- F-statistic calculatorUse the F-statistic calculator to compare the variances of two given populations.
- Hypothesis Testing CalculatorHypothesis testing calculator is here to help you quickly check your hypothesis and get p-values and critical values in seconds.
- Linear Regression CalculatorThe linear regression calculator determines the coefficients of linear regression model for any set of data points.
- Margin of Error CalculatorCalculate precise margins of error with our easy-to-use calculator. Get accurate results using the margin of error formula. Try it now!
- McNemar's Test CalculatorOur McNemar's test calculator can perform several different versions of this popular statistical test for paired binomial data, including the exact binomial test!
- Normal Approximation CalculatorUse the normal approximation calculator to approximate the probability for a binomial event with a normal distribution.
- Point Estimate CalculatorPoint estimate calculator computes the "best guess" of an unknown population parameter.
- Polynomial Regression CalculatorThe polynomial regression calculator can help you find a polynomial curve that best fits your data set.
- Power Analysis CalculatorUse our power analysis calculator to determine the minimum number of subjects for adequate study power.
- p-value CalculatorThe p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.
- Quadratic Regression CalculatorQuadratic regression calculator determines the parabola that best fits any given set of points.
- Raw Score CalculatorThe raw score calculator will help you to determine the original data point from the mean value, standard deviation, and z-score.
- Relative Error CalculatorFind out what is the relative error and absolute error, and discover the difference between the two, with our relative error calculator!
- Residual CalculatorThe residual calculator helps you to calculate the residuals of a linear regression analysis.
- Sampling Error CalculatorUse this tool to calculate the sampling error incurred when inferring from a population.
- t-statistic CalculatorUse the T statistic calculator to estimate the t-value of a given dataset.
- t-test Calculatort-test calculator performs all kinds of t-tests: one-sample, two-sample, and paired.
- Mann-Whitney U Test CalculatorThe Mann-Whitney U test calculator performs this popular statistical test using the beloved U statistic.
- Wilcoxon Rank-Sum Test CalculatorThe Wilcoxon rank-sum test calculator allows you to perform the famous non-parametric test based on the ranks of observations. Both exact and approximated versions are available, along with corrections for ties and continuity!
- Youden Index CalculatorOur Youden index calculator determines a test's effectiveness by measuring its ability to distinguish between true positives and true negatives.
- Z-score CalculatorThe z-score calculator can help you determine the standard score for a data point.
- Z-test CalculatorOur Z-test calculator is here to help you learn about, and perform, a one-sample Z-test.
Other calculators
- Sample Size CalculatorThe sample size calculator determines the sample size required for the result to be statistically significant.
- Shannon Entropy CalculatorCheck out this Shannon entropy calculator to find out how to calculate entropy in information theory.
Show redundant calculators
Redundant calculators
Calculators you see below have a very close or identical functionality to other calculators, they exist only to make it easier for you to find them.
- 10 Sided Dice Roller CalculatorUse this 10-sided dice roller calculator to roll up to 15 10-sided dice at a time.
- 2 Dice Roller CalculatorOur 2 dice roller calculator simulates a toss of two dice and much more!
- 4-Sided Dice Roller CalculatorSet up to 15 dice to roll with our 4-sided dice roller calculator.
- 6 Sided Dice Probability CalculatorUse 6 sided dice probability calculator to find the likelihood of rolling numerous numbers sets with standard cubic dice.
- 6 Sided Dice Roller CalculatorOur 6-sided dice roller calculator simulates the toss of the most common dice type and much more!
- 90% Confidence Interval CalculatorIf you don't like statistics, but life is forcing you to count the 90% confidence interval, this calculator will significantly help.
- 95% Confidence Interval CalculatorThe 95% confidence interval calculator will be your buddy in calculating the range in which you can be 95% sure of your result.
- 99% Confidence Interval CalculatorThe 99% confidence interval calculator will help you with the fundamental statistics problem of estimating a specific confidence interval.
- AND Probability CalculatorLearn how to calculate the joint probability of two events with Omni's AND probability calculator.
- Ascending Order CalculatorSort numbers from least to greatest with this ascending-order calculator.
- Combination without Repetition CalculatorUse our combinations without repetition calculator to know the possible combinations without repetition from a group of objects.
- Combinations with Repetition CalculatorThis tool calculates the combinations with repetition of a set of objects. But be careful! Please don't confuse it with permutation!
- Custom Dice Roller CalculatorThis custom dice roller calculator will help you with boredom and roll up to 15 dice with up to 120 sides!
- D100 Dice Roller CalculatorThis fast D100 dice roller calculator will allow you to throw up to 15 D100 dice at a time.
- D20 Dice Roller CalculatorRoll online multiple D20 dice for Dungeons & Dragons or any tabletop game with our D20 dice roller calculator.
- Decimal Odds CalculatorUse our decimal odds calculator to quickly find your total return in case of a winning bet.
- Decimal Random Number GeneratorThis decimal random number generator can output sequences of uniformly distributed random numbers from any given range.
- DnD Dice Roller CalculatorUse DnD Dice Roller Calculator to easily roll multiple dice for your tabletop game.
- False Positive CalculatorThe false positive calculator finds the rate of false positives based on the specificity and prevalence.
- First Quartile CalculatorOur first quartile calculator will teach you all there is about the lower quartile.
- Fractional Odds CalculatorUse this fractional odds calculator to find the odds of a situation in fraction form.
- Greatest To Least CalculatorSort numbers in descending order with this greatest-to-least calculator.
- Least to Greatest Decimals CalculatorUse our least to greatest decimals calculator to sort decimals in ascending order.
- Lower Fence CalculatorUse this tool to calculate the lower fence of a set of numbers.
- Moneyline Odds CalculatorFind out how much you can win or lose if you wager $100 with the moneyline odds calculator's help.
- Order from Least to Greatest CalculatorUse this calculator to order from least to greatest, for any list of numbers.
- Ordering Decimals CalculatorUse this calculator to order decimals in ascending or descending order
- Ordering Numbers CalculatorWith our ordering numbers calculator, you can quickly rearrange up to 50 numbers in ascending or descending order.
- OR Probability CalculatorThis or that? The OR probability calculator will teach you how to find the probability of one outcome, the other, or both.
- Permutation without Repetition CalculatorCount exactly what the name says with our permutation without repetition calculator!
- Permutation with Repetition CalculatorFind out how many different arrangements of a set of objects are possible using this permutation with repetition calculator.
- Pie Chart Angle CalculatorWith this pie chart angle calculator, you will be able to quickly create pretty pie charts!
- Pie Chart Percentage CalculatorWith the pie chart percentage calculator, you can find the percentage fraction of categories in a data set, and display them in a pie chart.
- Possible Combinations CalculatorUse our possible combinations calculator to know how many combinations are possible, given a total number of objects and a sample size.
- Probability Fraction CalculatorLearn how to express probability as a fraction with our probability fraction calculator!
- Quartic Regression CalculatorA set of x-y data is fitted with a 4th-order polynomial model using the quartic regression calculator.
- Random Dice RollerThe random dice roller can roll up to fifteen dice at once and output a list of their results.
- Sensitivity CalculatorThis sensitivity calculator will introduce you to this key concept related to the accuracy of diagnostic tests.
- Specificity CalculatorWith our specificity calculator, you can learn how to examine the accuracy of diagnostic tests.
- Third Quartile CalculatorThis third quartile calculator can help you discover all the interesting properties of the upper quartile.
- Two Dice Probability CalculatorUse the two dice probability calculator to find the likelihood of running different types of two dice.
- Upper Fence CalculatorEfficiently determine limits with our upper and lower fence calculator. Perfect for statistical analysis. Simplify your data evaluation now!