How to use it
- Enter loan amount.
- Set annual interest rate.
- Choose loan term in years.
- View monthly payment, total interest and total cost.
What it does – The calculator takes the loan amount, annual interest rate and term in years and 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 sum of all payments. Why it matters – Knowing these numbers helps you compare offers, budget cash flow, and avoid surprises when the loan ends. How to read it – The monthly payment is the amount due each month. Total interest is the extra cost of borrowing. Total of payments is the loan amount plus that interest. Use the results to negotiate a lower rate or a shorter term that fits your financial goals. You can also adjust one variable at a time to see how a higher rate or longer term inflates your cost, giving you a clear picture before you sign any paperwork.
Pro tips
- Add a small buffer for fees or rounding when budgeting.
- Use the exact APR from the loan offer, not just the headline rate.
- Compare monthly payment vs total cost; a lower payment may hide higher interest.
- Double‑check that the term matches the contract (e.g., 60 months = 5 years).
Real-life examples
- A recent college graduate comparing two dealership financing offers.
- A small business owner budgeting cash flow for a delivery van purchase.
- A family refinancing an older car to lower monthly expenses.
Case study
Maria saw a $3,200 difference in total cost after entering a 4.9% rate versus a 5.9% rate for the same $20,000 loan. The calculator showed her a $150 lower monthly payment and saved her $1,800 in interest, prompting her to negotiate a better rate.