Convert between metric units — length (mm/cm/m/km), mass (g/kg), capacity (ml/l). Convert hours, minutes, seconds.
Convert from a larger unit to a smaller one (km → m → cm → mm).
Convert from a smaller unit to a larger one (mm → cm → m → km).
Fill the missing number when units are converted (e.g. 1 m = ? cm).
Compare imperial length quantities expressed in different units.
Convert miles → yards → feet → inches.
Convert inches → feet → yards → miles.
Read analogue and digital clocks to the exact minute.
Convert between seconds, minutes, hours, days and weeks.
Work out how much time has passed between two clock times.
Convert between millilitres, decilitres, litres and hectolitres.
Convert between grams, kilograms and tonnes.