Add tax to a net amount or strip it back out of a gross amount, with common rates one click away.
Monthly payment, total interest and full amortisation for any loan term and rate.
Seven temperature scales - Celsius, Fahrenheit, Kelvin, Rankine, R\u00e9aumur, R\u00f8mer and Delisle - with exact round trips and a table of body and cooking temperatures.
Every unit category in one place, with a searchable reference table.
Wien's peak wavelength and the Stefan-Boltzmann flux, with the luminosity of a star at the radius you type.
Archimedes for any object in any fluid: buoyant force, apparent weight and a float or sink verdict from the densities.
Henderson-Hasselbalch against the useful pKa +- 1 band, and the exact charge-balance pH for a real recipe.
Euler-Bernoulli tip deflection and bending stress for a rectangular section, with a factor of safety.
