➗ Math, Date & Finance

Calculators, numerics, date logic, statistics, and finance tools

Convert inches to centimeters with configurable decimal precision

Convert meters to feet with configurable decimal precision

Convert centimeters to inches with configurable decimal precision

Estimate required sample size for proportions or means using confidence level, margin of error, and optional finite population correction

Convert kilograms to pounds with configurable decimal precision

Convert pounds to kilograms with configurable decimal precision

Calculate z-scores, cumulative probability, tail probability, and interval probability for a normal distribution

Run one-sample or two-sample t-tests from raw data and inspect t statistics, degrees of freedom, and p-values

Run one-way ANOVA across multiple groups and inspect sums of squares, F statistic, and p-value

Calculate Pearson correlation, covariance, and linear association strength from paired numeric data

Calculate confidence intervals for a sample mean or proportion using either raw data or summary statistics

Run simple linear regression on paired numeric data and inspect slope, intercept, correlation, and predictions