factor = 2 / ( Days + 1 ) If factor = 0.2 then Days = 2.0 / 0.2 -1.0 = 9 -----Original Message----- From: Frank Kaeberlein [mailto:frankkaeb@xxxxxxxxxx] Sent: Thursday, July 18, 2002 9:10 PM To: Omega Group Subject: exponential average question How do I "convert" a 0.2 exponential average into an equivalent period of days?