Car Loan Calculator

A car loan calculator is a tool that helps you calculate the periodic payments on a car loan and how much of each payment goes towards the principal and interest. It is an essential tool for anyone who wants to take out a car loan. In this article, we will discuss the concepts, formulae, benefits, interesting facts, and use cases of a car loan calculator.


Car Loan

A car loan is a type of personal loan that is used to purchase a vehicle. The borrower receives a lump sum of money from the lender and then repays the loan over time with interest.

Interest Rate

The interest rate is the cost of borrowing money from a lender. It is usually expressed as an annual percentage rate (APR).

Principal Amount

The principal amount is the amount of money borrowed from a lender.


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Monthly Payment

The monthly payment is the amount of money paid by the borrower to the lender at regular intervals.

Amortization Schedule

An amortization schedule is a table that shows how much of each payment goes towards the principal and interest and how much is left on the loan balance after each payment. It also shows the total interest paid over the life of the loan.


Monthly Payment Formula

The monthly payment formula for an amortized car loan is:

M = P * (r * (1 + r)^n) / ( (1 + r)^n – 1)


  • M = Monthly Payment
  • P = Principal Amount
  • r = Monthly Interest Rate
  • n = Number of Payments

Interest Formula

The interest formula for an amortized car loan is:

I = P * r * t


  • I = Interest Paid
  • P = Principal Amount
  • r = Annual Interest Rate
  • t = Time in Years


A car loan calculator has several benefits, including:

  • Helps you understand how much you will pay in interest over the life of your loan.
  • Helps you determine how much you can afford to borrow.
  • Helps you compare different loan options.
  • Helps you make informed decisions about your finances.

Interesting Facts

Here are some interesting facts about car loans and car loan calculators:

  • The first known use of an amortization schedule was in 1934 by the Home Owners’ Loan Corporation (HOLC) in the United States.
  • Amortization schedules are used by lenders, such as financial institutions, to present a loan repayment schedule based on a specific maturity date.
  • Most accounting and spreadsheet software have functions that can calculate amortization automatically.

Use Cases

Here are some use cases for a car loan calculator:

  • Purchasing a new or used car: A car loan calculator can help you determine how much your monthly payments will be and how much interest you will pay over the life of your car loan.
  • Refinancing an existing car loan: A car loan calculator can help you determine if refinancing your existing car loan will save you money in interest payments.
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