Total Interest Cost Calculator
Practical tip: interest is the price tag on borrowing. This tool makes it visible — before you sign, not after.
Run your numbers
How to use this tool
Enter the loan amount, annual rate, and term in years. Use the rate from a real quote for the most useful answer.
Press Calculate to see total interest and total repayment side by side with the monthly payment.
Read the principal-vs-interest bar. It shows how much of every dollar you repay goes to the lender instead of paying down your balance.
Shorten the term or lower the rate and run it again. Small changes move the interest total a lot — that is the cheapest negotiation you will ever do.
Keep reading: borrower guides
How Loan Interest Is Calculated: Simple vs Compound
What Is the Total Cost of a Loan? How to Figure It Out
APR vs Interest Rate: What’s the Difference?
Estimates only, not financial advice. Check final terms with your lender.