Math & Numbers
Calculate credit-weighted GPA from course names, credit hours, and letter or numeric grades
gpa-calculatorMath & Numbers
Calculate adjusted R squared from R squared, sample size, and predictor count
adjusted-r-squared-calculatorMath & 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
Fit a binary logistic regression model with gradient descent and predict class probabilities
logistic-regression-calculatorMath & Numbers
Compare three or more independent groups with the nonparametric Kruskal-Wallis H test
kruskal-wallis-calculatorMath & Numbers
Run chi-square goodness-of-fit or independence tests from observed counts or contingency tables
chi-square-test-calculatorMath & Numbers
Calculate chi-square distribution PDF, CDF, and right-tail probability from a statistic and degrees of freedom
chi-square-distribution-calculatorMath & Numbers
Calculate exact, cumulative, and upper-tail binomial probabilities for independent Bernoulli trials
binomial-distribution-calculatorMath & Numbers
Calculate probabilities for the trial number of the first success in repeated Bernoulli trials
geometric-distribution-calculatorMath & Numbers
Calculate posterior probability P(A given B) using prior, likelihood, and false-positive rate
bayes-theorem-calculator