This is from the wiki: Rounding Rolls You may want to use rounding in your roll formulas to emulate mechanics such as "half a level, rounded down to the nearest level." Roll20 provides two functions to accomplish this: floor() , which will always round the number down (e.g. 5.7 becomes 5), and ceil() which will always round the number up (e.g. 5.1 becomes 6). You can use these functions almost anywhere in your roll formulas (around a single math expression, groups of math expressions, or even the entire roll). For example: /roll floor (2d6/2) will half then round down to the whole number so there will not be any partials. /roll ceil (2d6/2) will do the same but round up. You can put any dice type and amount in there so if you want half of 1d100 roll it will give you that. Not sure how to add the query roll into it but someone more experienced will answer soon.