Comparing Mortgage Terms Estimate the total cost in today's dollars of various mortgage alternatives. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Share | Related Content Forecast The market is as unpredictable as the weather. We’d love to help you prepare. Should You Choose a Fixed or Variable? When selecting a mortgage, one of the most critical choices is between a fixed or variable interest-rate mortgage. How Much Home Can I Afford? With a few simple inputs you can estimate how much of a mortgage you may be able to obtain.