Is there any one who had tried to build/convert a php version of the Excel method in computing Turn-around time(excluding holidays, weekends and non-business hours)? Excel Turn-around Time Computation: =(NETWORKDAYS(A2,B2,H$1:H$10)-1)*("17:00"-"8:00")+IF(NETWORKDAYS(B2,B2,H$1:H$10),MEDIAN(MOD(B2,1),"17:00","8:00"),"17:00")-MEDIAN(NETWORKDAYS(A2,A2,H$1:H$10)*MOD(A2,1),"17:00","8:00") :REF-URL[http://www.mrexcel.com/forum/excel-questions/514097-i-need-formual-calculate-turn-around-time.html] Thanks.