Math & Numbers
Estimate academic credit hours from weekly lecture, lab, studio, term length, and contact-hour rules
credit-hour-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 posterior probability P(A given B) using prior, likelihood, and false-positive rate
bayes-theorem-calculatorMath & Numbers
Calculate P(A given B) from joint probability P(A and B) and condition probability P(B)
conditional-probability-calculatorMath & Numbers
Calculate Pearson and Spearman correlation coefficients from paired numeric data
correlation-calculatorMath & Numbers
Calculate sample and population covariance from paired numeric data
covariance-calculatorMath & Numbers
Calculate coefficient of variation as relative standard deviation for comparing variability across datasets
coefficient-of-variation-calculatorMath & Numbers
Compare arithmetic, geometric, and harmonic averages for a numeric dataset in one place
average-calculatorDesign
Batch generate Code 128, EAN-13, UPC-A, ITF-14, QR Code, and Data Matrix outputs from CSV or multiline text
barcode-batch-generatorMath & Numbers
Perform structured arithmetic and analysis for complex numbers in algebraic and polar form
complex-number-calculator