There are many kinds of loan calculators. One example is mortgage loan calculators for extra payments and early mortgage payoffs which will calculate how much is saved by making extra monthly payments on mortgage loans. Mortgage loans interest costs are front-end loaded where majority of interest rates are paid in the early years of the mortgage. This mortgage loan calculator for extra payment and early payoff provides an amortization schedule - which shows each month how much of monthly loan payment is being applied towards interest costs, and how much is actually applied to reduce the outstanding balance of loan.