Reduce a ratio with GCD, scale it, split a whole into ratio parts, and convert between seven common unit pairs. GCDSCALINGPARTSUNITSCLIENT-SIDE
Turn a distance and a finish time into pace per kilometre, pace per mile, speed in km/h and mph, and metres a second, plus the finish times that same pace holds to across six benchmark distances.
Days between any two dates, business days with weekends skipped, whole and exact weeks, and the gap in plain words.
Percent of a number, what percent one value is of another, percent increase and decrease, and the difference between two percentages, each with the formula shown.
Determinant, inverse, trace, rank and transpose for a matrix you type in, with clean messages for non-square and singular input.
Every status code, searchable, with plain-English notes.
Generate robots.txt and a sitemap skeleton.
Spaced-repetition decks that live in your browser.
APA 7, MLA 9, Chicago 17 and Harvard from one form for books, journal articles, websites and reports, with each style's own author rules and a BibTeX tab.
