Formula in Excel 2016
Because time stamps are represented as serial numbers, you can subtract the earlier time from the later time to get the difference.
When calculating the difference between two dates, you may want to exclude weekends and holidays.
A common type of date calculation determines the number of days between two dates.
If you would like to better understand how some of these complex array formulas work, consider using a handy tool - Formula Evaluator:
Applying a number format to a cell doesn't change the value, but only how the value appears in the worksheet. Formatting can play a joke with you, e.g., sum of values seems incorrect because Excel displays a limited number of decimal places and their sum is not equal to the real sum.
Range names is a powerful Excel feature which allows you to give a symbolic name for the cell or range of cells to be later used as convenient replacement for cell/range address in formulas.
There are several operators that could be used in formulas.
If you simply need to perform a calculation, you can use the Formula bar as a calculator.
Formulas can refer to cells in other worksheets-and the worksheets don't even have to be in the same workbook. Excel uses a special type of notation to handle these types of references.
You can enter nonrelative references (absolute or mixed) manually by inserting dollar signs in the appropriate positions, or you can use a handy shortcut - F4 key.