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  4. Mortgage Calculator

Mortgage Calculator

Home price, down payment, taxes, insurance, extra principal, and a full amortization schedule.

Loans & mortgages

  • Loan Calculator
  • Amortization Calculator
  • Mortgage Calculator
  • Auto Loan Calculator
  • Interest Rate Calculator

How it works

A mortgage is an amortizing home loan. Monthly principal and interest follow the standard payment formula. Property tax, insurance, HOA, and other costs are added as housing expenses; PMI is included only while loan-to-value is above 80% of the original price.

Loan = Price − Down, A = P · i(1+i)^N / ((1+i)^N − 1)

When to use

Use this tool when you need to: default: {price} home, 20% down, 6.5% for 30 years, plus typical tax and insurance.

How to use this tool

  1. Enter your values in the fields above.
  2. Review the formula and any mode options for your problem.
  3. Read the result and the step-by-step solution.

Default: {price} home, 20% down, 6.5% for 30 years, plus typical tax and insurance.

Frequently asked questions

What is the Mortgage Calculator?
A mortgage is an amortizing home loan. Monthly principal and interest follow the standard payment formula. Property tax, insurance, HOA, and other costs are added as housing expenses; PMI is included only while loan-to-value is above 80% of the original price.
How do I use the Mortgage Calculator?
Enter the required values, then calculate. The Mortgage Calculator shows results, formulas, and step-by-step work when available. No account is required.
What formula does the Mortgage Calculator use?
Loan = Price − Down, A = P · i(1+i)^N / ((1+i)^N − 1)

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Mortgage Calculator

Home price, down payment, taxes, insurance, extra principal, and a full amortization schedule.

Taxes and housing costsin use
Optional extra payments
More options

Try an example

How it works

How this mortgage is calculated

The loan amount is the home price minus the down payment. Monthly principal and interest (P&I) use the standard amortization formula with monthly compounding. The schedule shows interest, principal, and remaining balance for each month of a fixed-rate loan.

Down payment and term

A larger down payment lowers the loan, the payment, and total interest. Conventional loans often avoid PMI at 20% down. 15-year terms cost more each month but far less interest than 30-year terms. This tool does not model adjustable rates, points, or closing costs.

Taxes, insurance, and PMI

Property tax, home insurance, HOA, and other costs are entered as an annual amount or a percent of the home price, then shown monthly. They run for the original loan term, with optional yearly increases. PMI is a percent of the loan (or an annual amount) and stops once the remaining balance is 80% of the original home price, or when the loan is paid off.

Extra and biweekly payments

Extra monthly, yearly, or one-time principal shortens the loan and cuts interest; the scheduled P&I payment does not change. Accelerated biweekly payoff is half the monthly P&I every two weeks (26 payments a year), which is roughly one extra monthly payment per year.