• LinkedIn
  • YouTube
  • Twitter
  • Facebook
  • Google+

Overdue invoice? 3 easy 'date math' tips

by on
in The Office Tech Pro

Most people, if asked whether a date in an Excel spreadsheet is text or a value, may tilt their heads and give an answer that sounds more like a question. Well, dates are actually numbers. The number associated with a date is the number of days it is past January 1, 1900. Take the date July 4, 2011. To Excel, even though you may see it as 7/4/2011, it is actually 40,728. If I ask, “Can I subtract 40,902 from 40,728?” you would tell me I could. But, if I asked, can I subtract 7/4/2011 from 12/31/2011, you might not be so sure. Well, the answer there is also , yes.

Between two dates
With 7/4/2011 in  cell A1 and 12/31/2011 in cell B1, I can type this formula in cell C1 to find out that there are 180 days between the 4th of July and New Year’s Eve.

Between date and today
If you always want to find out how many days past due an invoice might be, you could use this function TODAY() in cell E2 subtracting the Invoice Due.

Calculating a future or past date
If you know that a follow-up call will be made to a client in 45 days, you can add 45 to the Last Contact Date in D1 in a formula in E2.

Another great application for date math in Excel is project task tracking. Learn more about this and other project management capabilities of Excel kin our latest  webinar, Microsoft Excel for Project Management. Click here to register.

Like what you've read? ...Republish it and share great business tips!

Attention: Readers, Publishers, Editors, Bloggers, Media, Webmasters and more...

We believe great content should be read and passed around. After all, knowledge IS power. And good business can become great with the right information at their fingertips. If you'd like to share any of the insightful articles on BusinessManagementDaily.com, you may republish or syndicate it without charge.

The only thing we ask is that you keep the article exactly as it was written and formatted. You also need to include an attribution statement and link to the article.

" This information is proudly provided by Business Management Daily.com: http://www.businessmanagementdaily.com/18950/overdue-invoice-3-easy-039date-math039-tips "

{ 3 comments… read them below or add one }

Trisha Lowman August 11, 2011 at 10:37 am

Thanks for the great tip!


-- The editors, Business Management Daily August 9, 2011 at 2:46 pm

Thanks, Karen for pointing that out…the formatting is now fixed!


Karen August 9, 2011 at 12:38 pm

I think you may want to do a little formatting correction in your second example. :)


Leave a Comment