Usps Rates 2024 Calculator Usa. Usps has several pricing tiers that can dramatically impact the shipping rates you receive for your packages. Usps sends mail to over 180 countries, including canada and australia.

Changes by usps for postcards, flats & letter size explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and. Save up to 90% on shipping rates!