A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Why not just attach code to the checkbox instead of the worksheet?
However, to force the calculate to run you could insert a formula in another cell that will trigger the calculate event when A1 changes value. Just insert the formula =A1 in any other cell (even one out of the way of your main data) and then when A1 changes, the formula will trigger the calculate event.