Microsoft Excel is capable of counting the number of cells that contain numbers, so if there was a time when you chose to manually count cells, then such days are over. That is because it is possible ...

Subtraction is the easiest way to count days between two dates in Excel. You can use the arithmetic operator – (minus sign) to subtract one date from another to find the number of days between them.

Excel's VALUE function has only one argument: where a is the value stored as text that you want to convert into a number.