Math & Numbers
Calculate the least-squares regression line, residuals, and squared error diagnostics from paired data
least-squares-calculatorMath & Numbers
Find the linear trend line of best fit for paired data and predict y values from x
line-of-best-fit-calculatorMath & Numbers
Fit a simple least-squares linear regression model and calculate slope, intercept, R squared, and predictions
linear-regression-calculatorMath & Numbers
Compare three or more independent groups with the nonparametric Kruskal-Wallis H test
kruskal-wallis-calculatorMath & Numbers
Calculate Kendall tau-a and tau-b rank correlation for paired numeric data
kendall-tau-calculatorMath & Numbers
Calculate raw and excess kurtosis to measure tail weight and peakedness of a distribution
kurtosis-calculatorMath & Numbers
Solve linear equations of the form ax + b = 0 using coefficients or a typed equation
linear-equation-solverSecurity
Decode JWT header and payload, verify HS256 or RS256 signatures, and flag algorithm, expiry, and sensitive-claim security risks
jwt-decoder-security-auditorMath & Numbers
Convert kilometers per hour to miles per hour with configurable decimal precision
kmh-to-mphMath & Numbers
Convert kilometers to miles with configurable decimal precision
km-to-milesMath & Numbers
Convert kilograms to pounds with configurable decimal precision
kg-to-lbMath & Numbers
Convert pounds to kilograms with configurable decimal precision
lb-to-kg