Pipe flow from ID and velocity, or solved from a pressure drop and length with an iterated Colebrook-White friction factor alongside the explicit Swamee-Jain and Haaland approximations and the gap between them. Separates laminar, transition and turbulent regimes and says where the equations stop being reliable.
Independent, paired and one-sample t-tests from real summary statistics: the t statistic, degrees of freedom, p-value and a verdict at alpha 0.05.
Push uncertainties through any formula step by step, in quadrature or worst case, with partial derivatives and a relative or absolute output error.
Length, area and volume change with temperature for any material, plus the fixed-length gap a joint needs to stay sealed from cold to hot.
Batches of UUID v4 values from the browser's own CSPRNG, plus CRC32, FNV-1a and DJB2 of any text with both hex and decimal output.
An IPv4 CIDR into its network address, netmask, broadcast, total and usable host counts and the first and last usable host, with the address as a 32-bit integer and back.
Compare two semantic versions the way semver actually orders them, sort a list, and see what a caret or tilde range resolves to.
Compare products by price and quantity normalized to one unit, ranked by what you actually pay per gram, per ml or per sheet.
