30 Year Fixed Rate Calculator



Calculating a 30-year fixed-rate mortgage is a crucial step for anyone considering a home loan. To simplify this process, we’ll provide an efficient HTML and JS calculator that adheres to the most accurate formula. Follow the instructions below to utilize the calculator effectively.

How to Use

  1. Input the loan amount in the designated field.
  2. Enter the annual interest rate.
  3. Specify the loan term (30 years for a fixed-rate mortgage).
  4. Click the “Calculate” button to obtain the monthly mortgage payment.


The formula for calculating the monthly payment for a fixed-rate mortgage is as follows:


  • is the monthly mortgage payment.
  • is the loan amount.
  • is the monthly interest rate (annual rate divided by 12 and expressed as a decimal).
  • is the total number of payments (loan term in years multiplied by 12).


Suppose you are seeking a $250,000 mortgage with a 4% annual interest rate for 30 years. Using the formula:

The resulting monthly payment would be approximately $1,193.54.


Q1: Can this calculator be used for other loan terms?

A1: No, this calculator is specifically designed for 30-year fixed-rate mortgages.

Q2: Is the formula provided accurate for all scenarios?

A2: Yes, the formula is universally applicable for fixed-rate mortgage calculations.

Q3: Can I use this calculator for commercial loans?

A3: While the formula is accurate, this calculator is tailored for residential 30-year fixed-rate mortgages.


This HTML and JS calculator simplifies the often complex task of computing monthly payments for a 30-year fixed-rate mortgage. By adhering to the accurate formula and following the instructions, users can quickly obtain the information they need.

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