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Simple Interest Loan Calculator

Personal Loans Calculator

A personal loan calculator can help you estimate your monthly loan payment based on an estimated loan amount, annual percentage rate (“APR”)1, and term.
To use the loan calculator, enter a loan amount, select a loan term, select an APR, and click calculate. The calculator will display your estimated monthly payment based using a simple interest calculation, which is a formula for determining interest based on the initial sum borrowed.
Use the calculator below to help you determine how a personal loan† could fit into your budget.

Personal Loan Calculator2

Select Loan Amount:






Loan Term In Months
Invalid Loan Term

Please Enter APR
Invalid Interest rate

Estimated Monthly Payments


APR 1 0%

Total Repayment Amount $0

Checking offers will not impact your credit score*
1APR is a percentage that represents the total annual cost of borrowing money and includes fees and other charges, in addition to interest.
2 Please note that this calculator is provided only for educational purposes and is not reflective of specific loans terms available. Mariner Finance does not guarantee the accuracy of the calculator, and the calculator is not intended to provide financial, insurance, tax, or legal advice. Mariner Finance offers loans with interest calculated based on state-specific law, which will be either simple interest or pre-computed interest as required. All terms of any loan offer will be fully disclosed to the fully disclosed to the applicant on his/her loan agreement.

Understanding your loan calculator results

Estimated monthly payment: This amount is what you can expect to pay each month, based on the loan amount, loan term and your estimated APR.

APR: Most personal loans carry fixed rates, meaning your interest rate and payments will not change over the life of the loan. APRs also include origination fees, which are one-time fees to cover the cost of processing your loan.

Total repayment amount: This amount is the total you will repay, including interest, at the end of the loan.