We know that your time is valuable and you need answers in a hurry. So we've made it easy to compare the simplest and most cost effective way to send your business mail. The Business Calculator on the Postal Explorer® website lets you calculate prices for all shapes and classes of mail. Not sure which class of mail or preparation method is best for you? Calculate several options and then hit the "Show History" button to have all the calculations you just made listed side-by-side for comparison to make your decisions simpler. Quick navigation tools assist in providing you with definitions or links to other references for ease-of-use. No more head scratching when trying to figure out per-piece and per-pound prices - we calculate it for you so that you can spend time on your other business needs.