Loan Calculator
Calculate loan payments and see how extra monthly principal changes payoff time and interest.
Calculator.net referenceFinanced amount
$25,000.00
Scheduled interest
$5,774.80
Payoff with extra
54 months
Interest with extra
$5,124.84
First month principal
$335.83
The extra payment is applied directly to principal each month.
Origination fee is included in the financed amount so fees are not hidden from APR-style comparisons.
Live validation and instant result updates instead of a submit-only workflow.
Multiple decision metrics are shown together, not only the primary answer.
Formula notes and assumptions are visible on the page so the math is easier to audit.
Reference Model
Modeled after the input style and primary output on Calculator.net's Loan Calculator.
The page keeps the math in one place and exposes the assumptions beside the result.
Default inputs: loanAmount=25000, interestRate=8.5, loanYears=5, extraPayment=50, originationFee=0