Hi, Try pchisq(q,df) available at help(Chisquare) Ozgur -- View this message in context: http://r.789695.n4.nabble.com/How-to-calculate-chi-sqaure-value-from-statistical-value-and-degrees-of-freedom-tp4632385p4632386.html Sent from the R help mailing list archive at Nabble.com.