How to use it
- Enter the loan amount, annual interest rate, and term in years.
- Click the Calculate button.
- Read the monthly payment, total interest, and total of payments displayed.
What it does Enter loan amount, interest rate and term. The calculator instantly shows your monthly payment, total interest over the life of the loan, and the sum of all payments.
Why it matters Knowing the monthly payment helps you budget; total interest reveals the true cost of borrowing; the overall payment figure lets you compare loan offers.
How to read the numbers
- Monthly payment: amount due each month.
- Total interest: extra money paid beyond the principal.
- Total of payments: principal plus interest. You can adjust any input to see how a lower rate or shorter term changes the payment and overall cost. Use the tool before you sign a loan agreement to negotiate better terms. Try multiple scenarios side‑by‑side to visualize long‑term savings and decide if refinancing makes sense.
Pro tips
- Round the loan amount to the nearest thousand for quick mental checks.
- Enter the interest rate as a percent (e.g., 4.5), not a decimal.
- If you have extra cash, test a shorter term to see interest savings.
- Double‑check that the term matches the loan’s amortization schedule.
Real-life examples
- First‑time homebuyer comparing three loan offers.
- Refinance planner estimating savings from a lower rate.
- Real‑estate investor forecasting cash flow for a rental property.
Case study
Sarah entered a $250,000 loan at 4.2% for 30 years and saw a $1,200 monthly payment, $165,000 total interest, and $415,000 total cost. By adjusting the term to 15 years, her payment rose to $1,860 but total interest dropped to $83,000, helping her decide on a shorter loan.