Even at relatively low interest rates, you may be surprised at the amount of interest you pay over the life of a loan. The calculator below estimates the amount of time required to pay back one or more debts.Additionally, it gives users the most cost-efficient payoff sequence. Use this loan calculator to determine your monthly payment, interest rate, number of months or principal amount on a loan. Use this calculator to help you determine your monthly car loan payment or your car purchase price. You can use our simple interest calculator to calculate the simple interest, without compounding, on your savings or loan. The mortgage payoff calculator helps you find out. The debt snowball is a debt payoff method where you pay your debts from smallest to largest, regardless of interest rate. Knock out the smallest debt first. Instantly work out your monthly repayment figures for a car or vehicle loan with this finance calculator tool.