The EOMONTH function in Microsoft Excel returns the last day of a month in the past, the current month, or a month in the ...

That's why a framework, not a rule, is a better way to calculate the amount of money you'll need in retirement. Here's how to do it. Image source: Getty Images.

If you want to calculate how much time is left until a certain expiry date, you can use the DATEDIF function. This function returns the difference between two dates in terms of days, months, or years.

To calculate the total number of drinks needed for a party, multiply the number of guests (G) by the number of hours of party time (T). Multiply that figure by the number of drinks per hour (DPH).

This is the final step to calculating the amount you'll need in retirement. Current planning standards indicate that retirees can safely distribute 3% to 4% of their total account value each year ...