It’s easy to calculate your monthly loan payments using our calculator. Simple enter the loan amount, interest rate and repayment term. For example, a $5,000 loan at 13.50% interest over two years results in a $238.89 monthly payment. A $10,000 loan at the same rate over five years costs $230.10 monthly. The interest rate you’ll pay is determined by loan term and credit history. Generally, longer terms mean higher interest.