Hey everyone. I think this is the right forum for this question. I have a form that tracks Production Downtime. The table contains the fields: [Total Minutes], [Time Down], and [Time Restart]. A form uses the function: =Sum(DateDiff("n",[Time Restart],[Time Down])*-1) to show the difference between [Time Restart] minus [Time Down] in field [Total Minutes]. The problem is, of course, that the table doesn't update field [Total Minutes]; the values are only displayed on the form. So the question is, is there any way to update the table with the calculated values from the form? (and if anyone says "use a calculated field in a query, I'm going to stab myself in the jugular with a butter knife! I don't know what the f*&k that means!). Thanks.