My apologies if I'm doing this wrong, this is my first time posting. My question is or should I say my problem is calculating the time. I making a database for the volunteer fire department in my city. and they want to know how many hours each volunteer has each month. I used the DateDiff to calculate the time in mins in my query this works my problem is when I try to sum the time field in my report, this is where it gets strange some times it converters properly unless the total mins is over 1000 then is either adds 15/30 mins or not. my grand total works (I think) I was going to use two fields but I think that wasteful space. I tried making a module but it didn't work unless I'm doing something wrong. Thanks for any help you can give. Deb