// multi-utility computation suite · offline · instant · precise
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fin.loan-amortization-extra-payments Calculator
Calculates interest saved and years shortened from making extra monthly principal payments on a mortgage. An extra $200/month on a $300,000 30-year mortgage at 6.5% saves approximately $90,000 in interest and shortens the loan by 5 years.
Inputs
Principal
Reference formula or conversion factor shown for context.
Rate Pct
The rate at which interest accrues. Small differences compound dramatically — compare carefully when choosing between lenders.
Term Years
How many years to repay the loan. 15-year terms cost more monthly but far less in total interest. 30-year terms lower monthly payments but increase total cost significantly.
Extra Monthly
Reference formula or conversion factor shown for context.
Results
interest saved
The total amount saved compared to the baseline scenario — cost savings, time savings, or resource savings.
payoff date
The value at the specified point or condition.
months saved
The result expressed in months. Divide by 12 to convert to years.