Statistics Calculators

Browse 49 free statistics tools. All tools are free, instant, and require no signup.

Analyze data with statistical calculators for mean, median, standard deviation, probability, regression, and hypothesis testing. Make data-driven decisions.

All Statistics Tools

• 5-Number Summary Calculator - Calculate the minimum, first quartile, median, third quartile, and maximum for any data set.
• A/B Test Calculator - Determine the statistical significance of your experiments and compare conversion rates.
• A/B Test Significance Calculator - Enter visitors and conversions for two variations to determine statistical significance
• Basic Probability - Calculate the odds and probabilities of independent and dependent events.
• Bayes' Theorem Calculator - Calculate conditional probabilities using Bayes' theorem with step-by-step explanation
• Binomial Distribution Calculator - Calculate binomial probabilities for n trials with probability p of success
• Binomial Probability Calculator - Calculate the probability of a specific number of successes in a set number of independent trials.
• Central Limit Theorem Calculator - Calculate the distribution of sample means using the central limit theorem. Find probability of sample mean being within a range.
• Coefficient of Variation Calculator - Calculate the coefficient of variation (CV) to compare variability across different data sets
• Combination Calculator - Calculate combinations (n choose r) - the number of ways to select r items from n items without regard to order
• Confidence Interval Calculator - Calculate confidence intervals for population mean or proportion. Supports z-intervals and t-intervals at various confidence levels.
• Confidence Interval Calculator 90% - Calculate the range of values with 90% certainty for your statistical sample.
• Confidence Interval Calculator 95% - Calculate the range of values with 95% certainty for your statistical sample.
• Confidence Interval Calculator 99% - Calculate the range of values with 99% certainty for your statistical sample.
• Correlation Coefficient - Measure the strength and direction of the linear relationship between two variables.
• Dice Probability Calculator - Calculate the probability of rolling specific totals with multiple 6-sided dice.
• Empirical Rule Calculator - Apply the 68-95-99.7 rule to calculate percentage of data within standard deviations from the mean for normal distributions.
• Gacha Pity Probability Calculator - Calculate cumulative pull odds with pity system mechanics for gacha games
• Geometric Mean Calculator - Calculate the geometric mean of numbers, ideal for growth rates and ratios
• Linear Regression Calculator - Analyze relationships between two variables and generate a prediction model using linear regression.
• Margin of Error Calculator - Calculate the margin of error for your survey results to understand the precision of your data.
• Mean Absolute Deviation Calculator - Calculate the mean absolute deviation (MAD) of a data set to measure average distance from the mean
• Mean Calculator - Calculate the arithmetic mean (average) of a set of numbers with step-by-step explanation
• Mean, Median, Mode Calculator - Calculate central tendency metrics for any set of numbers instantly.
• Median Calculator - Calculate the median (middle value) of a dataset with step-by-step sorting and explanation
• Mode Calculator - Find the mode (most frequent value) of a dataset with frequency analysis
• Moving Average Calculator - Calculate simple moving averages for any data series to identify trends and smooth out fluctuations.
• Normal Distribution Calculator - Calculate probabilities and Z-scores within a normal distribution (Bell Curve) instantly.
• Outlier Calculator - Detect and identify statistical outliers in datasets using IQR method, Z-score, or modified Z-score with visual highlighting
• P-Value Calculator - Determine statistical significance by calculating p-values from Z-scores or T-scores instantly.
• Percentile Calculator - Calculate any percentile from a data set or find what percentile a value falls at
• Permutation Calculator - Calculate permutations (nPr) - the number of ways to arrange r items from n items where order matters
• Poisson Distribution Calculator - Calculate Poisson probabilities for events occurring at a known average rate λ
• Poker Pot Odds Calculator - Calculate pot odds and compare to hand equity to decide whether a call is mathematically correct
• Probability Distribution Calculator - Calculate probabilities for normal, binomial, Poisson, and exponential distributions. Essential for statistics, quality control, and data analysis.
• Quartile Calculator – IQR Calculator - Calculate quartiles (Q1, Q2, Q3) and interquartile range (IQR) for a data set
• Range Calculator - Calculate the range (difference between maximum and minimum) of a dataset with step-by-step explanation
• Relative Standard Deviation Calculator - Calculate RSD (coefficient of variation) to measure the precision and variability of data as a percentage of the mean
• Sample Size Calculator - Determine the required sample size for your survey based on confidence levels and margin of error.
• Standard Deviation & Variance - Calculate dispersion metrics including variance and standard deviation for population or samples.
• Standard Error Calculator - Calculate the standard error of the mean (SEM) to measure sampling precision
• Statistics Calculator - Calculate comprehensive statistics including mean, median, mode, range, variance, standard deviation, and more
• Sum of Squares Calculator - Calculate total sum of squares (TSS), explained sum of squares (ESS), and residual sum of squares (RSS) for statistical analysis
• T Table – Student's t-Distribution Table - Interactive t-distribution table for statistics. Find critical t-values for hypothesis testing and confidence intervals.
• T-Test Calculator - Perform a T-test to compare the means of two groups and determine if they are significantly different.
• Variance Calculator - Calculate population and sample variance from a data set with step-by-step breakdown
• Winning Percentage Calculator - Calculate winning percentage from wins, losses, and ties. Perfect for sports statistics, gaming records, and competition tracking.
• Z Table – Standard Normal Distribution Table - Interactive Z-score table for statistics. Look up probabilities and percentiles from standard normal distribution values.
• Z-Score Calculator - Standardize your data points by calculating how many standard deviations they are from the mean.