Statistics Calculators
Data Analysis & Probability
11 calculators
Available Tools
Average Calculator
Calculate mean, median, mode, range, sum, and more. Free online average calculator for statistics and data analysis.
Standard Deviation Calculator
Calculate standard deviation, variance, mean, and other statistics for sample and population data. Free online standard deviation calculator.
Variance Calculator
Calculate variance for sample and population data with step-by-step breakdown. See standard deviation, mean, and sum of squared deviations.
Percentile Calculator
Calculate percentiles, quartiles, deciles, and percentile ranks for your data. Find Q1, Q2, Q3, IQR and more. Free online percentile calculator.
Z-Score Calculator
Calculate z-scores from raw scores, find raw scores from z-scores, and convert between z-scores and percentiles. Free online z-score calculator.
Probability Calculator
Calculate probability for single events, multiple events, conditional probability, combinations (nCr), and permutations (nPr). Free probability calculator.
Correlation Calculator
Calculate Pearson correlation coefficient (r), R-squared, and linear regression. Analyze relationship between variables. Free online correlation calculator.
Sample Size Calculator
Calculate required sample size for surveys and research. Supports confidence levels, margin of error, and finite population correction.
Confidence Interval Calculator
Calculate confidence intervals for population mean and proportion. Supports multiple confidence levels. Free online confidence interval calculator.
Linear Regression Calculator
Free linear regression calculator. Find slope, intercept, correlation coefficient, R-squared, and make predictions. Includes scatter plot visualization.
Mean, Median, Mode Calculator
Calculate mean, median, and mode from a set of numbers. Also find range, sum, min, max, and count. Free statistics calculator.