Determining why UPS calculator does not match exact UPS charges

Consider making changes to your "UPS settings". Click on the "Shipping" link in your Site Manager then click on "Edit UPS Settings" under the "UPS Shipping Options" section. If you do not have in-store pickup, you should change the Pickup Type to "Suggested Retail Rate". Daily Pickup is always lower than Suggested Retail Rate.

Consider changing your Default Package Settings in the UPS settings and see if it makes a difference. We generally suggest that you leave it at 0 x 0 x 0. Then do a test on the site and see if your calculation for the same 2 cartons to the same zip code gets you closer to your actual shipping cost.

Also, you can add a handling charge or a percentage to markup shipping for your UPS shipping method if you need to. In the Site Manager click on your "Shipping" link. You will see that you have one UPS method active which is "UPS Ground". There is an "Edit" link next to this method. Click on this link. This will open the page where you can add an additional shipping charge (ex: 13.00) or just markup the charge by a certain percentage (example: 5.00 would be 5%). Then "Save". You will want to test a few
different zip codes to make sure that the shipping charge is what you expect.