Math Tools

Probability, statistics, and number theory calculators for everyday math.

Binomial Probability Estimator

Estimate binomial probability for exactly k successes from n trials with success probability p.

Compute a z-score from x, mean, and standard deviation to see how far a value is from the mean.

Estimate a two-sided confidence interval for a mean using a Z critical value and sample standard deviation.

Compute mean, median, mode(s), and range from a list of numbers.

Factorize an integer into primes with exponents (e.g., 360 = 2^3 × 3^2 × 5).

Normal-approximation two-sided p-value for comparing two proportions.

Least-squares line from comma-separated x and y lists.

Two-sided z-test p-value for two proportions plus Pearson chi-square for a 2×2 table (df=1).