How to use it
- Enter the loan amount you plan to borrow.
- Set the annual interest rate as a percentage.
- Choose the loan term in years.
- Read the monthly payment, total interest and total cost results.
What it does – The calculator takes three inputs – loan amount, annual interest rate and term – and instantly shows three key figures: monthly payment, total interest paid over the life of the loan, and the total of all payments. Why it matters – Knowing your monthly payment helps you budget, while total interest reveals the true cost of borrowing. How to read it – The monthly payment is the amount you’ll owe each month. Total interest is the extra money paid beyond the principal. The total of payments is simply principal plus interest, giving you a complete picture of the loan’s expense.
Pro tips
- Round the loan amount to the nearest thousand for a quick sanity check
- If the rate is APR, use the exact number; don’t convert to a decimal twice
- Longer terms lower monthly payments but raise total interest – compare both
- Double‑check that the term is entered in years, not months
Real-life examples
- First‑time homebuyer estimating affordability before house hunting
- Refinance candidate comparing current payment to a new rate
- Real estate investor evaluating cash flow for a rental property
Case study
Maria entered a $250,000 loan at 4.5% for 30 years, saw a $1,266 monthly payment and $206,000 total interest, then adjusted the term to 15 years, reducing payment to $1,902 and total interest to $84,000, helping her choose the better option.