182 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 Poisson distribution through risk calculators and permutation calculators all the way to binomial distribution, you will always find a useful calculator amongst 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 ;))

Critical Value Calculator

The critical value calculator helps you find the one- and two-tailed critical values for the most widespread statistical tests.

p-value Calculator

The p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.

Confidence Interval Calculator

The confidence interval calculator finds the confidence level for your data sample.

Probability Calculator

Use the probability calculator to find the likelihood of various interactions between two distinct events.

t-test Calculator

t-test calculator performs all kinds of t-tests: one-sample, two-sample, and paired.

Dice Probability Calculator

With this dice probability calculator, you can easily find the various probabilities related to rolling a set of dice.

Z-score Calculator

The z-score calculator can help you determine the standard score for a data point.

Empirical Rule Calculator

The empirical rule calculator allows you to find the three intervals within which you'll find 68, 95, and 99.7% of your data.

Combination Calculator

Use the combinations calculator to determine the number of combinations for a set.

Coin Flip Probability Calculator

Coin flip probability calculator lets you calculate the likelihood of obtaining a set number of heads when flipping a coin multiple times.

Odds Calculator

Use the odds calculator to convert odds to a probability of winning or losing.

Degrees of Freedom Calculator

The degrees of freedom calculator finds the number of independent values in a data sample.

Binomial Distribution Calculator

Use the binomial distribution calculator to calculate the probability of a certain number of successes in a sequence of experiments.

Z-test Calculator

Our Z-test calculator is here to help you learn about, and perform, a one-sample Z-test.

Point Estimate Calculator

Point estimate calculator computes the "best guess" of an unknown population parameter.

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Accuracy Calculator

The accuracy calculator is a simple tool for calculating accuracy using three simple methods.

Bayes' Theorem Calculator

Bayes' theorem calculator helps calculate conditional probabilities in accordance with Bayes' rule.

Bertrand's Box Paradox

What is the chance of choosing the box containing only gold? Find the answer to Bertrand's box paradox with Omni!

Bertrand's Paradox

Bertrand's paradox is an intriguing warning for every scientist: dealing with infinity and randomness can lead to pitfalls!

Birthday Paradox Calculator

The 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 Paradox

The boy or girl paradox is an excellent example of why how we ask questions matters!

Chebyshev's Theorem Calculator

The Chebyshev's theorem calculator counts the probability of an event being far from its expected value.

Coin Flip Probability Calculator

Coin flip probability calculator lets you calculate the likelihood of obtaining a set number of heads when flipping a coin multiple times.

Coin Toss Streak Calculator

With this coin toss streak calculator, you will discover a very interesting problem in probability related to consecutive heads appearing in coin flips.

Combination Calculator

Use the combinations calculator to determine the number of combinations for a set.

Conditional Probability Calculator

Use the conditional probability calculator to determine the probability of an event conditional on another event.

Confusion Matrix Calculator

Our confusion matrix calculator helps you to calculate all the metrics you need to assess the performance of your machine learning model.

Dice Average Calculator

With this dice average calculator, you can quickly calculate the average value of a set of dice rolls.

Dice Probability Calculator

With this dice probability calculator, you can easily find the various probabilities related to rolling a set of dice.

Dice Roller Calculator

Use 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 Calculator

Unlock the power of statistics with our expected value formula calculator. Learn how to calculate the expected value swiftly. Try it today!

False Positive Paradox Calculator

Discover why "accurate" tests can be misleading with this false positive paradox calculator.

Implied Probability Calculator

Our implied probability calculator helps you to calculate the probability of an incident happening, given the odds.

Monty Hall Problem Calculator

The Monty Hall Problem calculator can help you win a car 66% of the time — but only if you play the game!

Parrondo's Paradox Calculator

Learn how two losing games can make a winning game by alternating between them in this Parrondo's paradox calculator.

Password Combination Calculator

Use Omni's password combinations calculator to find how many possible combinations of numbers, letters, and symbols exist, given the length of a password.

Permutation Calculator

Use the permutation calculator to determine the number of permutations in a set.

P-Hat Calculator

Use 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 Calculator

The post-test probability calculator allows you to calculate pre-test probability, likelihood ratios, and finally, the post-test probability itself.

Probability Calculator

Use the probability calculator to find the likelihood of various interactions between two distinct events.

Probability of 3 Events Calculator

The probability of 3 events calculator determines the chances of three independent events occurring.

Random Number Generator

No more straining with the tossing a coin and the rolling of dice - this random number generator will give you the figures you need.

Relative Risk Calculator

Use the relative risk calculator to compare the probability of developing a disease in two groups of people.

Risk Calculator

Risk calculator checks which of the two options is less risky based on the probability of failure and its consequences.

Roulette Payout Calculator

Find your bet's odds and potential winnings with the roulette payout calculator!

Sensitivity and Specificity Calculator

Our sensitivity and specificity calculator is a simple way to calculate all the values needed in medical statistics.

Two Envelopes Paradox Calculator

The two envelopes paradox calculator helps you determine whether swapping envelopes will make you obtain the envelope with a larger amount of money.

Benford's Law Calculator

Benford's law calculator allows you to verify if your data set follows Benford's distribution of leading digits.

Beta Distribution Calculator

Beta distribution calculator can evaluate all things related to this famous family of probability distributions.

Binomial Distribution Calculator

Use the binomial distribution calculator to calculate the probability of a certain number of successes in a sequence of experiments.

Box Plot Calculator

The 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 Calculator

The central limit theorem calculator allows you to calculate the sample mean and the sample standard deviation for the given population distribution and sample size.

Confidence Interval Calculator

The confidence interval calculator finds the confidence level for your data sample.

Continuity Correction Calculator

The continuity correction calculator shows you how to apply continuity correction to approximate a binomial distribution of a given problem.

Empirical Rule Calculator

The 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 Calculator

The exponential distribution calculator finds out the probability of a certain amount of time elapsing between two events.

Exponential Growth Prediction Calculator

Exponential growth prediction tool estimates a future value based on past performances.

Frequency Distribution Calculator

The 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 Calculator

The frequency polygon calculator will help you create a frequency polygon for the given set of data points.

Geometric Distribution Calculator

Our geometric distribution calculator will help you determine the probability of a certain number of trials needed for success.

Histogram Calculator

The 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 Calculator

Use the hypergeometric distribution calculator to find the probability (or cumulative probability) associated with the hypergeometric distribution.

Lognormal Distribution Calculator

Our lognormal distribution calculator helps you solve problems regarding probabilities, quantiles, samples, etc. from the lognormal distribution.

Negative Binomial Distribution Calculator

The negative binomial distribution calculator calculates what is the probability according to the Pascal distribution.

Normal Distribution Calculator

Effortlessly calculate probabilities with our bell curve calculator, a perfect tool for any probability distribution analysis. Try it today!

Normal Probability Calculator for Sampling Distributions

The normal probability calculator for sampling distributions gives you the probability of finding a range of sample mean values.

Pie Chart Calculator

Using this pie chart calculator, you can compare values in different groups visually using a pie chart.

Poisson Distribution Calculator

The Poisson distribution calculator is a tool for determining the probability of a certain number of independent events happening in a given time.

Rayleigh Distribution Calculator

Our 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 Calculator

Our 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 Calculator

Use our sampling distribution of the sample proportion calculator to find the probability that your sample proportion falls within a range.

SMp(x) Distribution Calculator

SMp(x) distribution calculator can generate a six-parameter probability function, which can simulate virtually every known probability distribution.

Stem and Leaf Plot Calculator

Convert any given set of integers to a stemplot using this stem-and-leaf plot calculator!

Uniform Distribution Calculator

The uniform distribution calculator can perform all sorts of computations related to this popular probability distribution. Comes with free sample generator!

Upper Control Limit Calculator

The upper control limit calculator helps you determine the lower and upper control limit values of your dataset.

Weibull Distribution Calculator

Use this Weibull distribution calculator if you need find probabilities, quantiles, etc. in the Weibull distribution, or generate samples from this distribution.

5 Number Summary Calculator

The 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 Calculator

The rating average calculator returns an average rating based on the number of 1-5 ratings.

Coefficient of Variation Calculator

The coefficient of variation calculator is a convenient way to describe the standard deviation as a percentage of the mean.

Cohen's D Calculator

Our Cohen's D calculator can help you measure the standardized effect size between two data sets.

Constant of Proportionality Calculator

Our constant of proportionality calculator can help you to calculate the ratio that relates two dependable given values.

Correlation Coefficient Calculator

Correlation 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 Calculator

Covariance calculator gives you the sample covariance for two equally sized samples, as well as an estimate of population covariance.

Decile Calculator

Using the decile calculator, you can divide your data into deciles in order to interpret them.

Descriptive Statistics Calculator

The 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 Calculator

The 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 Calculator

This error propagation calculator helps propagate the primary parameter(s)' error to the final parameter.

Grouped Data Standard Deviation Calculator

Use the grouped data standard deviation calculator to find the mean, variance, and standard deviation of given data ranges.

Index of Qualitative Variation Calculator

Calculate the index of qualitative variation easily with our tool, employing the IQV formula for accurate and fast analysis.

IQR Calculator - Interquartile Range

The IQR calculator allows you to find the interquartile range of up to 50 values.

Least to Greatest Calculator

The least to greatest calculator is here to put your numbers (up to fifty of them) in ascending order, even if instead of specific values, you give it arithmetic expressions.

Mean Absolute Deviation Calculator

The mean absolute deviation calculator can calculate the mean absolute deviation around the mean, median, or any other statistically significant number.

Mean Median Mode Calculator

The mean median mode calculator tells you the mean, median, mode, range, and midrange of a dataset. We also show you all the steps!

Median Calculator

The median calculator allows you to calculate the median number of a dataset with up to 50 values.

Median Absolute Deviation Calculator

The median absolute deviation calculator can calculate the median absolute deviation of a data set of up to 50 points.

Midrange Calculator

The midrange calculator will quickly calculate the midrange of a given set of data.

Minimum and Maximum Calculator

The minimum and maximum calculator will quickly give you the smallest and largest values in your dataset of up to fifty entries.

MSE Calculator

The 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 Calculator

The 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 Calculator

Use 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 Calculator

The percentile calculator is here to help you get the k-th percentile of a data set of up to 30 numbers.

Percentile Rank Calculator

This percentile rank calculator finds the percentile for any data value in a dataset that contains up to 30 numbers.

Pooled Standard Deviation Calculator

Our pooled standard deviation calculator can help you measure the variability or spread of data when combining or pooling multiple datasets.

Population Variance Calculator

Use the population variance calculator to estimate the variance of a given population from its sample.

Process Capability Index Calculator

Our 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 Calculator

The quartile calculator is a simple tool to help you find the quartiles of your dataset (and some additional extra information).

Relative Standard Deviation Calculator

The relative standard deviation calculator presents the standard deviation as a percentage of the mean.

Simpson’s Diversity Index Calculator

Use Omni's Simpson's diversity index calculator to measure the species diversity in a community.

Skewness Calculator

This 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 Calculator

Spearman's correlation calculator can help you determine the value of this popular measure of rank association between two variables.

Standard Deviation Calculator

The standard deviation calculator tells you the mean and standard deviation of a dataset.

Standard Deviation Index Calculator

Here you can find the Standard Deviation Index Calculator and its possible uses for your test model.

Standard Deviation of Sample Mean Calculator

Use this tool to calculate the standard deviation of the sample mean, given the population standard deviation and the sample size.

Standard Error Calculator

Use 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 Calculator

Use this sum of squares calculator to determine the variability of your data.

Upper and Lower Fence Calculator

The upper and lower fence calculator determines the cutoff points for outliers in a dataset with up to 50 values.

Variance Calculator

The 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 Calculator

Discover the ultimate Venn diagram solver with our intuitive calculator. Effortlessly visualize complex data intersections and unions. Try it today!

Absolute Uncertainty Calculator

Find how far the measured value may be from the real one using the absolute uncertainty calculator.

AB Test Calculator

Determine the statistical significance of your A/B tests effortlessly with our AB test calculator. Reliable, quick results. Start calculating now!

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 Calculator

The critical value calculator helps you find the one- and two-tailed critical values for the most widespread statistical tests.

Cubic Regression Calculator

This cubic regression calculator will help you determine the polynomial of degree 3 that best fits your two-dimensional dataset.

Degrees of Freedom Calculator

The degrees of freedom calculator finds the number of independent values in a data sample.

Exponential Regression Calculator

The exponential regression calculator helps you find the exponential curve that best models your dataset.

Fisher's Exact Test Calculator

The 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 calculator

Use the F-statistic calculator to compare the variances of two given populations.

Linear Regression Calculator

The linear regression calculator determines the coefficients of linear regression model for any set of data points.

Margin of Error Calculator

Calculate 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 Calculator

Our 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 Calculator

Use the normal approximation calculator to approximate the probability for a binomial event with a normal distribution.

Point Estimate Calculator

Point estimate calculator computes the "best guess" of an unknown population parameter.

Polynomial Regression Calculator

The polynomial regression calculator can help you find a polynomial curve that best fits your data set.

p-value Calculator

The p-value calculator can help you find the p-value and evaluate how compatible your data is with the null hypothesis.

Quadratic Regression Calculator

Quadratic regression calculator determines the parabola that best fits any given set of points.

Raw Score Calculator

The raw score calculator will help you to determine the original data point from the mean value, standard deviation, and z-score.

Relative Error Calculator

Find out what is the relative error and absolute error, and discover the difference between the two, with our relative error calculator!

Residual Calculator

The residual calculator helps you to calculate the residuals of a linear regression analysis.

Sampling Error Calculator

Use this tool to calculate the sampling error incurred when inferring from a population.

t-test Calculator

t-test calculator performs all kinds of t-tests: one-sample, two-sample, and paired.

Mann-Whitney U Test Calculator

The Mann-Whitney U test calculator performs this popular statistical test using the beloved U statistic.

Wilcoxon Rank-Sum Test Calculator

The 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!

Z-score Calculator

The z-score calculator can help you determine the standard score for a data point.

Z-test Calculator

Our Z-test calculator is here to help you learn about, and perform, a one-sample Z-test.

Sample Size Calculator

The sample size calculator determines the sample size required for the result to be statistically significant.

Shannon Entropy Calculator

Check out this Shannon entropy calculator to find out how to calculate entropy in information theory.

10 Sided Dice Roller Calculator

Use this 10-sided dice roller calculator to roll up to 15 10-sided dice at a time.

6 Sided Dice Probability Calculator

Use 6 sided dice probability calculator to find the likelihood of rolling numerous numbers sets with standard cubic dice.

6 Sided Dice Roller Calculator

Our 6-sided dice roller calculator simulates the toss of the most common dice type and much more!

90% Confidence Interval Calculator

If you don't like statistics, but life is forcing you to count the 90% confidence interval, this calculator will significantly help.

95% Confidence Interval Calculator

The 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 Calculator

The 99% confidence interval calculator will help you with the fundamental statistics problem of estimating a specific confidence interval.

AND Probability Calculator

Learn how to calculate the joint probability of two events with Omni's AND probability calculator.

Combination without Repetition Calculator

Use our combinations without repetition calculator to know the possible combinations without repetition from a group of objects.

Combinations with Repetition Calculator

This tool calculates the combinations with repetition of a set of objects. But be careful! Please don't confuse it with permutation!

Custom Dice Roller Calculator

This custom dice roller calculator will help you with boredom and roll up to 15 dice with up to 120 sides!

D100 Dice Roller Calculator

This fast D100 dice roller calculator will allow you to throw up to 15 D100 dice at a time.

D20 Dice Roller Calculator

Roll online multiple D20 dice for Dungeons & Dragons or any tabletop game with our D20 dice roller calculator.

Decimal Odds Calculator

Use our decimal odds calculator to quickly find your total return in case of a winning bet.

Decimal Random Number Generator

This decimal random number generator can output sequences of uniformly distributed random numbers from any given range.

DnD Dice Roller Calculator

Use DnD Dice Roller Calculator to easily roll multiple dice for your tabletop game.

False Positive Calculator

The false positive calculator finds the rate of false positives based on the specificity and prevalence.

First Quartile Calculator

Our first quartile calculator will teach you all there is about the lower quartile.

Fractional Odds Calculator

Use this fractional odds calculator to find the odds of a situation in fraction form.

Greatest To Least Calculator

Sort numbers in descending order with this greatest-to-least calculator.

Least to Greatest Decimals Calculator

Use our least to greatest decimals calculator to sort decimals in ascending order.

Moneyline Odds Calculator

Find out how much you can win or lose if you wager $100 with the moneyline odds calculator's help.

Order from Least to Greatest Calculator

Use this calculator to order from least to greatest, for any list of numbers.

Ordering Numbers Calculator

With our ordering numbers calculator, you can quickly rearrange up to 50 numbers in ascending or descending order.

OR Probability Calculator

This or that? The OR probability calculator will teach you how to find the probability of one outcome, the other, or both.

Permutation without Repetition Calculator

Count exactly what the name says with our permutation without repetition calculator!

Permutation with Repetition Calculator

Find out how many different arrangements of a set of objects are possible using this permutation with repetition calculator.

Pie Chart Angle Calculator

With this pie chart angle calculator, you will be able to quickly create pretty pie charts!

Pie Chart Percentage Calculator

With 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 Calculator

Use our possible combinations calculator to know how many combinations are possible, given a total number of objects and a sample size.

Probability Fraction Calculator

Learn how to express probability as a fraction with our probability fraction calculator!

Quartic Regression Calculator

A set of x-y data is fitted with a 4th-order polynomial model using the quartic regression calculator.

Random Dice Roller

The random dice roller can roll up to fifteen dice at once and output a list of their results.

Sensitivity Calculator

This sensitivity calculator will introduce you to this key concept related to the accuracy of diagnostic tests.

Specificity Calculator

With our specificity calculator, you can learn how to examine the accuracy of diagnostic tests.

Third Quartile Calculator

This third quartile calculator can help you discover all the interesting properties of the upper quartile.

Two Dice Probability Calculator

Use the two dice probability calculator to find the likelihood of running different types of two dice.

Upper Fence Calculator

Efficiently determine limits with our upper and lower fence calculator. Perfect for statistical analysis. Simplify your data evaluation now!