Use this useful tool to convert time choosing one of the 18 units of measurment included in this app, that are:
Sievert:
sievert, kilosievert, hectosievert, decasievert, decisievert, centisievert, millisievert, microsievert and nanosievert
Roentgen equivalent man:
kilorem (roentgen equivalent man), hectorem (roentgen equivalent man), decarem (roentgen equivalent man), rem (roentgen equivalent man), decirem (roentgen equivalent man), centirem (roentgen equivalent man), millirem (roentgen equivalent man), microrem (roentgen equivalent man) and nanorem (roentgen equivalent man)
For every units of measurment are also included formulas to convert that unit as you want.