Instant statistics answers with shown working
Every calculator on this page shows the formula used, substitutes your values step-by-step, and links to the full article explaining the concept. Not just answers — understanding.
What makes a good statistics calculator
Most online calculators give you a number and nothing else. Every calculator here shows the formula first, substitutes your exact values, and — where the calculation has multiple steps, like standard deviation or a t-test — walks through a full working table so you can see exactly how the answer was reached. If you're a student, that shown working is what helps the method stick, not just the number.
Results are shareable by URL and copyable as plain text, so you can drop a worked calculation straight into a homework write-up, a lab report, or a Slack message to a colleague without retyping it.
Calculators by topic
Descriptive Statistics, Standard Deviation & Variance, Five-Number Summary & IQR
Basic Probability, Bayes' Theorem
Z-Score, Normal Distribution, Binomial Probability
Confidence Interval, Sample Size
t-Test, Chi-Square Test, One-Way ANOVA
Pearson Correlation, Simple Linear Regression