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Mortgage Calculator 30 Years Usa

Reviewed by Calculator Editorial Team

Calculate your 30-year fixed mortgage payments in the USA with this mortgage calculator. Enter your loan amount, interest rate, and down payment to estimate your monthly payment, total interest paid, and amortization schedule.

How to Use This Calculator

To use the mortgage calculator:

  1. Enter the loan amount you're requesting (e.g., $300,000)
  2. Input your interest rate (e.g., 6.5%)
  3. Specify your down payment amount or percentage
  4. Click "Calculate" to see your monthly payment and other details

The calculator will show you:

  • Monthly payment amount
  • Total interest paid over 30 years
  • Total amount paid (principal + interest)
  • Amortization schedule visualization

Formula Used

The monthly mortgage payment is calculated using the standard mortgage formula:

M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ] Where: M = Monthly payment P = Principal loan amount (loan amount - down payment) i = Monthly interest rate (annual rate / 12 / 100) n = Number of payments (loan term in years × 12)

For a 30-year mortgage in the USA, n = 360.

Note: This calculator assumes a fixed interest rate for the entire 30-year term. Adjustments may be needed if your mortgage rate changes.

Worked Example

Let's calculate a $300,000 mortgage with a 6.5% interest rate and 20% down payment:

  1. Down payment: $300,000 × 20% = $60,000
  2. Loan amount: $300,000 - $60,000 = $240,000
  3. Monthly interest rate: 6.5% ÷ 12 = 0.5417%
  4. Number of payments: 30 years × 12 = 360
  5. Monthly payment: $240,000 [ 0.005417(1 + 0.005417)^360 ] / [ (1 + 0.005417)^360 - 1 ] ≈ $1,540.25

Over 30 years, you would pay approximately $1,540.25 per month, totaling $554,490 in payments with $214,490 in interest.

Frequently Asked Questions

What is a 30-year mortgage?

A 30-year mortgage is a home loan that is repaid over 30 years (360 monthly payments) with a fixed interest rate. It's the most common mortgage term in the USA.

How does the interest rate affect my payment?

A higher interest rate means larger monthly payments and more total interest paid over the life of the loan. A lower rate reduces both your monthly payment and total interest costs.

What is the difference between APR and interest rate?

The interest rate is the cost of borrowing, while APR (Annual Percentage Rate) includes additional fees and costs. For a mortgage, the interest rate is typically used for calculations.