Payment Calculator
The Payment Calculator can determine the monthly payment amount or loan term for a fixed interest loan. Use the "Fixed Term" tab to calculate the monthly payment of a fixed-term loan. Use the "Fixed Payments" tab to calculate the time to pay off a loan with a fixed monthly payment. For more information about or to do calculations specifically for car payments, please use the Auto Loan Calculator.
What is a Payment Calculator?
A payment calculator is a financial tool that helps you determine either the monthly payment amount for a fixed-term loan or the time required to pay off a loan with fixed payments. It takes into account the loan amount, interest rate, and either the loan term or the fixed payment amount to provide detailed amortization schedules and payment breakdowns.
The Payment Calculation Formula
For a fixed-term loan, the monthly payment is calculated using the following formula:
$$PMT = \frac{P \times r \times (1 + r)^n}{(1 + r)^n - 1}$$
Where: - PMT is the monthly payment amount - P is the principal (loan amount) - r is the monthly interest rate (annual rate divided by 12 months) - n is the total number of payments (loan term in years multiplied by 12)
How to Use This Calculator
To calculate a loan payment, enter the loan amount, annual interest rate, and either the loan term (for fixed term) or the monthly payment amount (for fixed payment). Click 'Calculate' to see the results, including monthly payment amount (or loan term), total payments, total interest, and a detailed amortization schedule showing principal and interest portions of each payment.
Payment Calculator Examples
Estimating a Fixed Mortgage-Style Payment
A borrower wants to know the monthly payment for a $250,000 loan at 6.25% interest over 30 years.
Inputs: Loan amount = $250,000, interest rate = 6.25%, loan term = 30 years, calculation mode = Fixed Term.
What to look for: The calculator shows the estimated monthly payment, the total amount repaid, and how much of that repayment comes from interest over the full term.
This is useful when comparing whether a longer term lowers monthly cash flow enough to justify the extra interest cost.
Testing How Extra Monthly Budget Changes Payoff Time
A borrower can afford a fixed $1,800 monthly payment and wants to estimate how quickly a loan balance could be repaid.
Inputs: Loan amount = desired balance, interest rate = annual rate, monthly payment = $1,800, calculation mode = Fixed Payments.
What to look for: The calculator works backward to estimate how many years and months the payment would take to clear the balance.
This helps you evaluate whether increasing a planned monthly payment meaningfully shortens payoff time and reduces interest.
Frequently Asked Questions
How does the Payment Calculator work?
The Payment Calculator uses standard amortization formulas to determine either the monthly payment amount based on a fixed loan term or the time required to pay off a loan with a fixed monthly payment. The calculator considers the loan amount, interest rate, and either the loan term or payment amount to generate detailed payment schedules.
What is amortization?
Amortization is the process of paying off a debt (such as a mortgage or loan) through regular payments over time. Each payment is split between paying down the principal and covering the interest. In the early period of a loan, a larger portion of each payment goes toward interest, while in later periods, more of each payment reduces the principal.
How can I pay off my loan faster?
To pay off your loan faster, you can make additional payments toward the principal, make bi-weekly payments instead of monthly ones, or refinance to a shorter loan term if you can afford higher monthly payments. Even small additional payments can significantly reduce the total interest paid and shorten the loan term.