How will prepaying change my loan?

This calculator takes a principal amount, interest rate, normal length of the loan and either how much total a month to pay or how long you want to pay. It also can be used for credit cards and other loans using simple compounding of interest.
Enter your loan amount: -
Your interest rate: % (1 to 100)
Amortized Length of mortgage:
Enter "0" for credit card and other non amortized lines of credit
This is value you want to set