How to use it
- Enter loan amount.
- Enter annual interest rate.
- Enter loan term in years.
- View monthly payment, total interest and total cost.
What it does – The calculator takes the loan amount, the annual interest rate and the term in years, then instantly shows three key figures: the monthly payment you’ll owe, the total interest you’ll pay over the life of the loan, and the overall amount you’ll have paid.
Why it matters – Knowing the monthly payment helps you budget, while the total interest reveals the true cost of financing. The total of payments lets you compare different offers or decide if a shorter term saves enough interest to justify higher payments.
How to read the results – The monthly payment is the amount due each month. Total interest is the extra cost above the borrowed amount. Total of payments equals loan amount plus total interest.
Pro tips
- Add a small buffer (5‑10%) to cover rounding differences.
- Use the exact APR from your lender, not an estimated rate.
- Enter the term in whole years; if months matter, convert to a fraction.
- Double‑check that the loan amount includes any fees rolled into financing.
Real-life examples
- A recent college graduate comparing a 3‑year vs 5‑year loan for a used car.
- A small business owner budgeting cash flow for a fleet purchase.
- A homeowner refinancing a car loan to see if a lower rate reduces total cost.
Case study
Jenna wanted a $20,000 car loan. Using the calculator, she saw a 5‑year loan at 4.5% would cost $2,800 in interest versus a 3‑year loan at 4.2% costing $1,900. She chose the shorter term, saving $900.