A fixed pay lease calculator helps you figure out the costs and returns associated with leasing an asset for a set period. You provide details like the asset's value, how long you'll lease it for, the monthly payment, and the residual value (what it's worth at the end of the lease). The calculator then works out how much you'll pay in total, how much of that is interest, and the rate of return you're getting on your investment. It's handy for budgeting and understanding the financial implications of leasing something.