Is it possible in Excel to calculate only a certain range of cells,

Even if it is just the range selected for example.

I have a workbook that has all sorts going on.

To make it more efficient I have calculations set to manual.

Then hit F9 whenever I need to refresh, however, this can still take some time to calculate, (well over 10 mins)

Is it possible for me to select Cells `A1:B10`

, and some how just refresh the formulas in this range ?