I'm not sure exactly what you want, but I think this might help. If you have a list of numbers in A1:A10 and you wanted a running total going down B1:B10 you would use: =SUM($A$1:$A1) and copy that down column B with the fill handle. With the dollar sign before the row reference in the first half, the starting number for the SUM never changes. Without the dollar sign before the row reference in the second half, the SUM will always calculate down to the current row (assuming you put 1 and started in row 1. For row 2, put a 2 instead of a 1). Let me know if that helps.