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Statistics Calculators

Free online statistics calculators. Accurate, fast, and easy to use tools for all your calculation needs.

19+ CalculatorsFree to UseInstant Results
5 Number Summary Calculator
Calculate the minimum, first quartile, median, third quartile, and maximum of a dataset.
Free
Accuracy Calculator
Calculate the accuracy and percent error of a measurement.
Free
Average Rating Calculator
Calculate the weighted average rating from star reviews.
Free
Coefficient of Variation Calculator
Calculate the coefficient of variation (CV) to measure relative variability.
Free
Cohen
Calculate Cohen
Free
Constant of Proportionality Calculator
Calculate the constant of proportionality (k) for two directly proportional variables.
Free
Correlation Coefficient Calculator
Calculate Pearson
Free
Covariance Calculator
Calculate the covariance between two variables (Sample or Population).
Free
Decile Calculator
Calculate the deciles (D1-D9) of a dataset.
Free
Descriptive Statistics Calculator
Calculate a comprehensive set of descriptive statistics for a dataset.
Free
Dispersion Calculator
Calculate measures of dispersion including Range, Variance, and Standard Deviation.
Free
Error Propagation Calculator
Calculate the uncertainty propagation for basic arithmetic operations.
Free
Grouped Data Standard Deviation
Calculate the standard deviation for grouped frequency data.
Free
IQR Calculator
Calculate the Interquartile Range (IQR) and identify outliers.
Free
Mean Absolute Deviation Calculator
Calculate the Mean Absolute Deviation (MAD) of a dataset.
Free
Mean Median Mode Calculator
Calculate the three most common measures of central tendency.
Free
Median Calculator
Calculate the median value of a dataset.
Free
Probability Calculator
Calculate the probability of an event occurring.
Free
Z-Score Calculator
Calculate the Z-score (standard score) of a raw value.
Free

About Our Statistics Calculators

Our collection of statistics calculators is designed to help you solve complex problems quickly and accurately. Whether you are a student, professional, or hobbyist, these tools provide the precision you need.

All calculators feature interactive visualizations, step-by-step explanations, and are completely free to use.