One of the many features of Excel is being nosy. That's right, you can quickly calculate a persons age as long as you have their birth date.

Calculate the difference between two values in your Microsoft Excel worksheet. Excel provides one general formula that finds the difference between numbers, dates and times.

How to Calculate the Total Hours Formula in Excel. As a spreadsheet software program, Microsoft Excel has many useful features for a small business's productivity.

Save this for the spreadsheet jocks in your office—we'd bet even the experts don't know all of these formula tips.