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Mortgage Calculator

Free mortgage calculator for monthly payment, total loan amount, and estimated repayment cost. Designed for US home buyers comparing home price, down payment, rate, and loan term.

Instant result
Estimated monthly mortgage
$1,970.30
Loan amount$320,000.00
Down payment20%
Total interest$389,306.21

This estimate includes principal and interest only. Property taxes, homeowners insurance, HOA fees, and PMI can increase the real payment.

Calculator results are provided for planning and educational purposes. For taxes, legal decisions, lending, or medical advice, verify the numbers with an official source or qualified professional.

About this calculator

This mortgage calculator gives you a quick estimate of your monthly principal and interest payment based on a home price, down payment, interest rate, and mortgage term. It is a useful first-pass tool for buyers comparing affordability before talking to a lender.

How this calculator works

The calculator first subtracts the down payment from the home price to estimate the mortgage principal. It then applies the standard fixed-rate mortgage payment formula using a monthly interest rate and the total number of monthly payments in the loan term.

How to use it

  1. Enter the home purchase price.
  2. Add your expected down payment amount.
  3. Enter the mortgage interest rate and choose the loan term.
  4. Use the monthly payment estimate to compare homes and down payment scenarios.

Example

A $400,000 home with a $80,000 down payment, a 6.75% mortgage rate, and a 30-year term can produce a very different monthly payment than the same home with a larger down payment or shorter loan.

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More ways to explore this calculator

Mega Calculators builds a content cluster around each high-value tool so users can open the live calculator, read the formula, follow a guide, or jump into example pages that match specific search intent.

Frequently asked questions

Does this mortgage calculator include taxes and insurance?

No. This version focuses on principal and interest. Property taxes, homeowners insurance, HOA fees, and mortgage insurance can raise the real monthly payment.

Is this good for comparing down payments?

Yes. Changing the down payment is one of the fastest ways to see how loan size and monthly cost move together.

Can I use this for refinance estimates?

Yes. If you know your refinance loan balance, rate, and term, the formula works the same way for a basic monthly payment estimate.

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