The following conversion factors are from an old newsletter of the Northern California Chapter of the Health Physics Society (^ is exponentiation, e.g. a ^ b is a raised to the power of b):
• 10^12 microphone = 1 megaphone
• 10^21 picolos = 1 gigolo
• 10 millipedes = 1 centipede
• 10 monologues = 5 dialogues
• 10^6 bicycles = 2 megacycles
One more conversion unit, from the Health Physics Society, is the PERSON-SIEVERT (as opposed to MAN-REM): the nickname PERVERT has been suggested.