Enter the interest rate, the balance, escrow, and term of the loan. Then, input however much money you plan on paying per month (required plus extra). The form will calculate how many years early you will pay off the loan and how much money you save.
The formula used is: \[Monthly Payment = P \frac{r(1+r)^n}{(1+r)^n - 1} \] \(P\) is loan amount, \(r\) is monthly interest rate, and \(n\) is number of payments