Funny how things work out but a colleague was asking me how to use Date calculations in Excel to calculate averages over time..... I thought of TES Maths and the rate that posters post ...... My little effort tells me that I post at a rate of 0.6 posts per day [since joining]. Tandy is tight-lipped at only 0.2 ! And a certain other poster is at 10.6 !!!!! Blimey!