The mortgage calculator is one of the most important tools in your arsenal. Before you head out into the Calgary real estate market, it’s important to figure out what you can comfortably afford and the mortgage calculator (and your mortgage broker/specialist) will help you to do that. Simply fill out the three fields and the results will show what your monthly payments will be. In Canada, most amortizations are 25 years and a mortgage broker/specialist will be able to give you your interest rate. That leaves the house price for you to decide and this will largely be determined by the mortgage payment your happy with.