💰 Loan Interest Calculator with Amortization
Calculate loan interest and the amortization schedule.
Loan Tools
Input Parameters
What This Calculator Helps You Decide
Use this calculator before taking a loan offer. It helps you compare monthly affordability against the total interest you would pay over time.
Who This Is For
- Borrowers comparing multiple personal, auto, or fixed-rate loan offers.
- Anyone who needs to balance a lower monthly payment against a lower total borrowing cost.
- People who want a simple first-pass view before digging into payoff strategy.
What To Enter
- Loan principal: the amount you need to borrow.
- Annual rate: the quoted APR or note rate for the offer you are considering.
- Loan term: the number of years you expect to carry the balance.
How To Read The Result
- Monthly payment shows the cash-flow commitment you need to budget for.
- Total interest shows the price of borrowing, not just the payment.
- Total payments combines principal and interest so you can compare offers on true cost.
Example scenario
A $25,000 loan at 7.2% for 5 years lands around a $497 monthly payment and roughly $4,800 in total interest. A shorter term raises the payment but usually cuts total cost sharply.
Common Mistakes
- Choosing the longest term only because the monthly payment feels safer.
- Comparing two loan offers by payment alone instead of total interest.
- Using a teaser rate or estimated rate instead of the actual loan quote.
Common Questions
What does amortization tell me?
It shows how each payment is split between interest and principal so you can see how quickly the balance really falls.
Should I always pick the shortest term?
Not always. The best term is the one you can comfortably afford without increasing the chance of missing payments.