Statistics Calculators
Standard deviation, variance, z-score, sample size, confidence intervals, and regression.
Average Calculator
Compute the arithmetic mean, median, mode, sum, count, and range for any set of numbers.
Bayes' Theorem Calculator
Calculate conditional posterior probability P(A|B), positive predictive value (PPV), false positives, and medical test accuracy.
Binomial Probability Calculator
Compute exact P(X=k) and cumulative binomial probabilities P(X≤k), P(X≥k), distribution mean, variance, and standard deviation.
Chi Square Calculator
Compute Pearson Chi-Square test of independence (χ²), degrees of freedom, p-value, expected frequencies, and Cramer’s V for 2x2 contingency tables.
Growth Percentage Calculator
Measure business growth rates, multiple factors, and forecast next period performance between any two data points.
Hypergeometric Distribution Calculator
Calculate probabilities for sampling without replacement, card draws, lottery ball selections, and quality inspection batches.
Normal Distribution Calculator
Calculate probabilities and percentiles for standard and general normal distributions, z-scores, and interval areas.
Poisson Distribution Calculator
Calculate Poisson probability P(X=k), cumulative event odds, and arrival rates per time or spatial interval.
Population Density Calculator
Calculate demographic population density per square mile and square kilometer, and available land area per inhabitant.
Slugging Percentage Calculator
Calculate baseball sabermetric slugging percentage (SLG), batting average, and isolated power (ISO) from official hits and at-bats.
Student T Value Calculator
Calculate Student t critical values (t*) and p-values for one-tailed and two-tailed tests from degrees of freedom and significance level alpha.
Win Percentage Calculator
Calculate team win-loss percentages, official league standings decimals, and games above or below .500 for sports and gaming.
Yearly Percentage Increase Calculator
Calculate compound annual growth rate (CAGR), multi-year percentage increase, and annualized gains across financial and business metrics.
Frequently Asked Questions about Statistics Calculators
Are the calculators in this category free to use?
Yes. All statistics calculators on Calculat.dev are 100% free with no account registration or limits.
Are my calculation inputs saved on a database?
No. Every calculation executes client-side directly in your browser. No personal or numeric inputs are recorded or transmitted to any server.
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Math Calculators
Solve arithmetic, percentages, averages, algebra, geometry, and advanced mathematics problems.
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Monitor your body mass index (BMI), calories, ideal weight, body fat, and wellness metrics.
Date & Time Calculators
Calculate exact age, days between dates, time durations, work days, and countdowns.