Calculating postage from the U.S. to Canada is a straightforward process. The amount of postage you must pay depends upon the weight of your package, the speed of delivery that you require, and the origination and destination points of the package. The shape and dimensions of your package may also play a role. The U.S. Postal Service website provides an international postage price calculator that can help you determine your rate. You can also ask a clerk at the post office to calculate the rate for you.
Select a package or choose a flat-rate box or envelope. Flat-rate service costs more but provides special handling for your package. Examples include the Express Mail International Flat Rate Envelope, for the fastest possible delivery, or the Priority Mail International Flat Rate Envelope, which offers a delivery speed between Express Mail and standard first-class postage. Global Express Guaranteed service delivers your package within one to three business days. For first-class delivery, your package must be a postcard, letter, large envelope or small package no heavier than one pound.
Weigh your package. The scale at the U.S. Post Office is the final judge as to how much your package weighs, but if you have an accurate scale at home, you can get a good idea of the weight of your package. The post office weighs packages by the ounce.
Calculate your postage rate using the international postage price calculator. For a first-class letter to Canada, the first 3.5 ounces of postage costs $1.15. A Priority Mail International Flat Rate envelope costs $31.35 with an expected delivery in six to 10 business days. An Express Mail International Flat Rate Envelope costs $40.38 for a maximum weight of 20 pounds, with expected delivery in three to five business days. Rates jump dramatically for Global Express Guaranteed deliveries, which are priced based on the ZIP code of origin and the dimensions of the package.
Determine any additional services you need. A certificate of mailing is a post office-issued document recording the date and time that you mailed a particular package. This service costs an additional $1.40, as of the time of publication. To send a letter or package via registered mail costs at least an additional $11.90. Selecting registered mail assigns the package or envelope a tracking number and bar code, which is scanned as the package proceeds towards delivery. Express Mail comes with its own advanced tracking system, making registered mail unnecessary. You can also insure your packages, for varying rates.#
Buy postage online to save money. For some services, including Priority Mail and Express Mail, the U.S. Postal Service offers postage discounts if you buy and print your postage online. You can receive a 5 percent discount on Priority Mail International shipments, an 8 percent discount on Express Mail International shipments, and a 10 percent discount on Global Express Guaranteed shipments purchased online, as of the time of publication.