Hi, I am Donald Battle. I am from Florida. I am working for a finance firm. The Mortgage Affordability Calculator is programmed to calculate ad hoc monthly payments for mortgages. Such calculators are called mortgage calculators. This calculator can also create depreciation plans. Mortgage calculators are different from regular mortgage calculators. You not only calculate the monthly interest, but also divide the principal amount according to the term of the mortgage. Payments are usually an amount partially due that month, along with interest due.