Excel/converting # of days to actual date
I have calculated the actual number of days a certain process will take for example 150 days. Now I want to calculate exactly what day (calendar days) that will be. I run this report at the first of the month so I have a fixed start date.
I want to know if on 5/1/14 the process takes 150 days what day will that be?
Excel Dates are stored as the number of days from a base date. For windows, that is Midnight on 31 Dec 1899 as becomes 1 January 1900. That really isn't of any significance. What is of significance is that to add 150 days to a date, you do just that. Add the number 150.
So if you have
5/1/14 in cell A1, then in cell B1 you can have =A1+150 and format B1 as a date.
That produces 9/28/2014 in cell B1.
Here is just a little more discussion/background information.
If you format cell A1 as General, you see the number 41760. This is the date serial number and represents the number of days since the base date. Now I add 150 to it and get
41760 + 150 = 41910.
in any cell enter 41910 and format that cell as a date. It should show Sept 28, 2014 in your chosen date format.
You also should know that a date serial can have a decimal part like 41760.25
this is 41760 and 1/4 days. So 1/4 of a day is 6 hours and this represents 6 AM on 5/1/2014. Just to show you how time is represented as well in conjunction with a date.
This topic answers questions related to Microsoft Excel spreadsheet (or workbook) stand-alone or Mircrosoft Office Excel including Excel 2003, Excel 2007, Office 2000, and Office XP. You can get Excel help on Excel formulas(or functions), Excell macros, charting in Excel, advanced features, and the general use of Excel. This does not provide a general Excel tutorial nor the basics of using a spreadsheet. It provides specific answers to using Microsoft Excel only. If you do not see your Excel question answered in this area then please ask an Excel question here