ChemCalLite only works in Molar, litres and grams, it cannot convert to different units. If you need to work in concentrations of milli-Molar (mM), micro-Molar (µM) etc., or volumes in milliliters (ml), micro-liters (µl) then you need to buy chemCal (also available on the App Store). ChemCal can easily and quickly convert between different unit values such as milli (m), micro (µ), nano (n), pico (p) and femto (f).