Financial Calculators
Mortgage Calculator
Estimate the fixed monthly mortgage payment, total paid, and total interest from a loan amount, rate, and term locally in your browser.
Enter a loan amount, annual interest rate, and term in years to estimate the fixed monthly mortgage payment. This calculator runs privately in your browser; your numbers are not uploaded or stored.
Estimate a fixed monthly mortgage payment before you borrow.
Enter a loan amount, annual interest rate, and term in years. The calculator estimates a fixed-rate monthly payment schedule in your browser. It does not include taxes, insurance, fees, or adjustable rates and is not financial advice; your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
What formula does the mortgage calculator use?
It uses the fixed-rate amortization formula: monthly payment = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is the loan amount, r is the monthly rate (annual rate ÷ 100 ÷ 12), and n is the number of monthly payments. With a 0% rate, the monthly payment is loan amount ÷ n.
What does this mortgage estimate include and exclude?
It estimates principal and interest for a fixed rate and term. It does not include property taxes, homeowner insurance, private mortgage insurance, HOA dues, closing costs, fees, or adjustable-rate changes. Check your lender disclosure for the full monthly obligation.
Which inputs are accepted?
Enter a loan amount greater than zero, an annual rate from 0% through 100%, and a term greater than zero through 50 years. Decimal values are accepted, and displayed amounts are rounded to two decimal places.
Do my values stay private, and is this financial advice?
Yes. The calculation and copy action run locally in your browser, and CodeASystem does not upload or store the values you enter. This is a general estimate, not financial advice.