onlineshippingcalculator.comCalculate and Compare Shipping for UPS, FedEx, USPS, and Sendle UPS, create an account. FedEx, create an account. USPS, create an account. The USPS Click-and-Buy account does not offer First Class or Parcel Select rate options. You can purchase those labels through Paypal. Aside from better rates, having a shipping account allows you to charge shipments to the account and receive one weekly bill.