About
Review how amortized loans are paid down over time and how extra payments change the math.
What amortization means
Amortization is the gradual payoff of a loan through recurring payments. Each payment usually contains two parts: interest charged on the remaining balance and principal that reduces what you still owe.
How this calculator estimates payments
Enter the original loan amount, annual rate, and loan term, then choose how often payments are made. The calculator applies the standard level-payment amortization formula to estimate the scheduled payment for each period.
Why extra payments matter
Optional extra payments go directly toward principal after each period interest charge is covered. That reduces the balance faster, lowers total interest, and can shorten the number of payments needed to reach zero.
Important limitations
This tool focuses on the core amortized loan calculation only. It does not include taxes, insurance, escrow, fees, changing interest rates, late payments, or lender-specific rounding rules, so treat the result as a planning estimate rather than a contractual quote.