Stats Calculator Online
Descriptive Statistics Calculators
Central tendency, variability, shape, and relationships. Free tools on Stats Calculator Online with formulas, how-to steps, similar calculator widgets, tidbits, and exportable reports.
- Mean, Median, Mode CalculatorCalculate arithmetic mean, median, and mode
- Average Calculator CalculatorCompute the arithmetic average (mean) of a data set
- Sum Calculator CalculatorAdd a list of numbers and show the total
- Basic Statistics CalculatorMin, max, sum, count, mean, median, mode, SD, and variance
- Descriptive Statistics CalculatorFull summary: mean, SD, skewness, kurtosis, outliers, and more
- Five-Number Summary CalculatorMin, Q1, median, Q3, and max
- Range, Variance & SD CalculatorMeasure spread with range, variance, and standard deviation
- Percent Error CalculatorPercent error of experimental vs theoretical value
- Odds to Probability CalculatorConvert odds of winning into probability and percent chance
- Vote Percentage CalculatorShare of each count as a percent of the total
- Mean Calculator CalculatorCompute the arithmetic mean of a data set
- Variance Calculator CalculatorSample or population variance with SD
- Standard Deviation CalculatorSample or population standard deviation with variance
- Quartile Calculator CalculatorQ1, Q2, Q3, IQR, min, and max
- Interquartile Range CalculatorIQR = Q3 − Q1 with quartile context
- Coefficient of Variation CalculatorRelative variability as a percentage of the mean
- Mean Absolute Deviation CalculatorAverage absolute deviation from the mean
- Median Absolute Deviation CalculatorRobust dispersion using median absolute deviations
- Percentiles, Quartiles & IQR CalculatorFind percentiles, quartiles, and interquartile range
- Geometric Mean CalculatorMean for multiplicative relationships and growth rates
- Harmonic Mean CalculatorMean for rates and speeds
- Skewness CalculatorMeasure asymmetry of a distribution
- Kurtosis CalculatorMeasure tailedness of a distribution
- Z-Score CalculatorStandardize values relative to mean and SD
- Correlation Coefficient CalculatorPearson correlation between two variables
- Covariance CalculatorJoint variability of two variables
- Partial Correlation CalculatorCorrelation controlling for a third variable
- Frequency Table CalculatorCounts and relative frequencies
- Contingency Table CalculatorCross-tabulation of categorical variables
- Cronbach Alpha CalculatorInternal consistency reliability
- Interrater Reliability CalculatorAgreement among raters (Cohen kappa approx)
- Likert Scale Analysis CalculatorSummarize Likert-scale responses
- Survey Response Rate CalculatorCompute response and completion rates
- Process Capability CalculatorCp, Cpk for process capability analysis
- Non-Normal Process Capability CalculatorPercentile Pp / Ppk capability
Tidbits from Stats Calculator Online
Tidbit
Read confidence intervals carefully
A 95% CI means that in repeated sampling, about 95% of such intervals would cover the true parameter—not that this one interval has a 95% chance.
CI calculators →Free on every tool
APA write-ups and PDF exports
After you calculate, copy APA/AMA text or download CSV, Word, and print-ready PDF—no paywall on Stats Calculator Online.
Browse calculators →Resources
Critical value tables nearby
Jump to z, t, χ², and F tables when you need critical values alongside an online calculator.
Open tables →
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Cross-topic picks from Stats Calculator Online
- One-Sample t-Test CalculatorHypothesis Testing · Test a sample mean against a hypothesized value
- Normal Distribution CalculatorProbability Distributions · PDF, CDF, and quantiles of the normal
- Simple Linear Regression CalculatorRegression Analysis · Fit y = a + bx with inference
- Chi-Square Independence CalculatorHypothesis Testing · Test association in contingency tables
- Sample Size & Power CalculatorHypothesis Testing · Plan sample size for desired power