Stats Calculator Online
General Math Calculators
GCF, LCM, factors, primes, ratios, rounding, and place value. Free tools on Stats Calculator Online with formulas, how-to steps, similar calculator widgets, tidbits, and exportable reports.
- GCF / GCD CalculatorGreatest common factor of integers
- LCM Calculator CalculatorLeast common multiple of integers
- Factors Calculator CalculatorList all positive factors of n
- Prime Factors CalculatorPrime factorization of n
- Prime Number Checker CalculatorTest whether n is prime
- Prime Numbers List CalculatorList primes up to a limit
- Ratio Simplifier CalculatorSimplify a:b using GCD
- Unit Rate CalculatorCompute a per-1 unit rate
- Scientific Notation CalculatorConvert a number to scientific notation
- Significant Figures CalculatorCount significant figures in a number
- Modulo Calculator Calculatora mod b with quotient and remainder
- Rounding Calculator CalculatorRound, floor, ceil, and truncate
- Place Value CalculatorBreak a number into place values
- Expanded Form CalculatorWrite a number in expanded form
- Speed Distance Time CalculatorSolve for speed, distance, or time
Tidbits from Stats Calculator Online
Tidbit
A p-value is not the probability H₀ is true
It is the probability of data at least as extreme as yours if H₀ were true. Pair it with an effect size and confidence interval.
P-value calculator →Need a path?
Not sure which test to run?
Start with the statistical test selector, then open the matching calculator with formulas and APA export.
Test selector →Remember
Correlation is not causation
Pearson r measures linear association. Plot the scatter first, and prefer Spearman when the relationship is monotonic but not linear.
Correlation tools →
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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
- Mean, Median, Mode CalculatorDescriptive Statistics · Calculate arithmetic mean, median, and mode
- 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