minutes and seconds per kilometre
Draw a wheel of any size, spin it with a fair cryptographic pick and land the winner under the pointer.
Draw random whole numbers in any range, with unique and sorted modes and a cryptographic source.
Convert 1-3999 both ways, see how each numeral adds up and catch non-standard forms like IIII.
Test any number for primality with Miller-Rabin, then get its prime factorisation and every divisor.
Water intake, urine volume, urinary calcium and urinary oxalate scored 0-100 with each factor's points and the arithmetic shown, so you can see which input moved the number. An educational estimate, not medical advice.
Convert between Mw, mb, Ms and ML with the published linear relations, then read the radiated energy in joules and in tonnes of TNT.
Size a rain tank from a monthly mass balance of catchment, rainfall, runoff coefficient and household demand, with days of autonomy.
Mass to moles to STP volume for any compound, plus M, mM, mol/L, g/L, mg/mL and ppm, with the molar mass table shown.
