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Question About US Postal Service Online Shipping Calculator

Recently I've put a bunch of stuff up for sale and in the process have made several trips to the USPS online shipping calculator to figure the shipping cost.   The site is very useful and easy to use IMO.  Plug in the zip codes for seller and recipient.  Enter the package's weight and physical dimensions.  All very straightforward and intuitive.  The one thing that puzzles me is the section where they ask you what time and what day you'll be shipping.  The time blocks are broken down into 1/2 hour increments.  I usually just pick some random time that I know will be convenient for me..."Okay, I'm not doing anything tomorrow between 1:00 and 1:30 so that's when I'll go to the post office!"  And that's what I enter.  So does anyone know why exactly they ask you what time you'll be shipping?  Do the rates really change all that much between say, shipping at 10:30 a.m. vs. going to the post office at 2 p.m.?  (Same thing goes for the date....is there much of a difference between shipping on a Tuesday vs. shipping on Thursday? ).  Maybe there's someone here who works for the post office or perhaps is a retiree who could shed some light on this.  It just strikes me as a bit odd.  Thanks in advance to anyone who knows.

Last edited by mike.caruso
Original Post

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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