30 Year Vs 15 Year Mortgage Calculator



Calculating the difference between a 30-year and a 15-year mortgage can be crucial in making informed financial decisions. To simplify this process, a user-friendly calculator can be immensely helpful. In this article, we will provide a comprehensive guide on how to use a 30 Year Vs 15 Year Mortgage Calculator, along with the underlying formula, examples, FAQs, and a working HTML and JS code for the calculator.

How to Use

  1. Enter the loan amount in the designated input field.
  2. Input the annual interest rate for the mortgage.
  3. Provide the loan term in years, choosing between 30 years and 15 years.
  4. Click the “Calculate” button to obtain the results.


The formula used in this calculator is based on the standard mortgage payment formula:


  • is the monthly mortgage payment.
  • is the loan amount.
  • is the monthly interest rate (annual rate divided by 12 and multiplied by 0.01).
  • is the total number of payments (loan term in years multiplied by 12).


Let’s consider a $250,000 loan amount with a 4% annual interest rate. For a 30-year term, the monthly payment would be $1,193.54, while for a 15-year term, it would be $1,849.22.


Q: Why is it essential to compare 30-year and 15-year mortgages?
A: Comparing these mortgage terms helps determine the impact on monthly payments and overall interest paid over the loan term, aiding in financial planning.

Q: Can I change the loan amount and interest rate for comparison?
A: Yes, the calculator allows you to input different loan amounts and interest rates for personalized comparisons.

Q: Is the formula used here accurate for mortgage calculations?
A: Yes, the formula is a standard method for calculating mortgage payments and is widely accepted in financial calculations.


Choosing between a 30-year and a 15-year mortgage is a significant decision. This calculator empowers users to make informed choices by providing clear insights into monthly payments and overall interest paid. By understanding the nuances, individuals can tailor their mortgage choices to align with their financial goals.

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