STATISTICS · CENTER & SPREAD
Mean median mode range calculator
Calculate the mean, median, mode, and range from up to 12 values while ignoring blank fields.
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Statistics calculators
Browse the live statistics calculators for descriptive summaries, probability, inference, and sample-size planning with transparent formulas.
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Live Statistics calculators
12 live calculators currently grouped in this category.
STATISTICS · DISPERSION
Standard deviation calculator
Compute population or sample standard deviation from up to 12 values while ignoring blank fields.
STATISTICS · VARIANCE
Variance calculator
Calculate sample or population variance from up to 12 values while ignoring blank fields.
STATISTICS · SUMMARY
Statistics calculator
Generate a compact summary of mean, median, mode, range, sample standard deviation, sample variance, min, max, and count.
STATISTICS · QUARTILES
Quartiles calculator
Compute Q1, Q2, Q3, and the interquartile range from up to 12 values using linear interpolation.
STATISTICS · Z-SCORE
Z-score calculator
Convert a raw value into a z-score using the population mean and population standard deviation.
STATISTICS · PROBABILITY
Probability calculator
Work through intersection, union, and conditional probability for two events.
STATISTICS · SAMPLE SIZE
Sample size calculator
Estimate the minimum sample size for a target confidence level and margin of error.
STATISTICS · CONFIDENCE INTERVAL
Confidence interval calculator
Compute a z-based confidence interval from the sample mean, sample standard deviation, sample size, and confidence level.
STATISTICS · COUNTING
Permutations and combinations calculator
Compute nPr and nCr from any valid n and r.
STATISTICS · P-VALUE
P-value calculator
Compute one-tailed and two-tailed p-values from a z-score.
STATISTICS · NORMAL CURVE
Normal distribution calculator
Compute the normal CDF, survival probability, and PDF for any x, mean, and standard deviation.