Compute the total interest paid on a car loan.
Please do not make financial decisions based on these results.
What is the Car Interest Calculator?
Compute the total interest paid on a car loan. To use the Car Interest Calculator, enter loan amount, rate, term; it returns total interest, monthly payment, total cost, and shows them instantly as you type.
Where the Car Interest Calculator fits
Compute the total interest paid on a car loan. The main figure it returns is the Total interest, worked out from the values you enter.
It belongs with the other budget & planning tools. If you are comparing options or checking a result from another angle, try the Car Depreciation Calculator, Car Affordability Calculator or the Net Worth Calculator.
How to use the Car Interest Calculator
- Fill in the fields. You will need Loan amount ($), Rate (%), Term (months). Start with your real monthly figures, even if they are rounded. Fields marked optional can stay at zero.
- Read the result. The highlighted box gives the Total interest, and the cards below show Monthly payment, Total cost. Tables and charts break it down further.
- Test other scenarios. Results update as you type. Change one value at a time to see what drives the answer, and press Reset to go back to the defaults.
Formula and how it works
Example with real numbers
Here is the Car Interest Calculator using the default values shown in the calculator above:
Inputs
| Loan amount ($) | 28,000 |
|---|---|
| Rate (%) | 6.9 |
| Term (months) | 60 |
Results
| Total interest | $5,186.81 |
|---|---|
| Monthly payment | $553.11 |
| Total cost | $33,186.81 |
With these inputs the calculator returns Total interest: $5,186.81. Change any value in the calculator to see how the result moves.
What if you change one input?
Sensitivity check: raising Loan amount ($) from 28,000 to 33,600 (about 20% higher) and leaving everything else as in the example above changes the results like this:
| Result | Example | After the change | Change |
|---|---|---|---|
| Total interest | $5,186.81 | $6,224.17 | +20% |
| Monthly payment | $553.11 | $663.74 | +20% |
| Total cost | $33,186.81 | $39,824.17 | +20% |
The input that moves the result most is the one to check twice. Change it in the calculator above to test your own case.
What the results tell you
The results panel of the Car Interest Calculator reports Total interest, monthly payment and total cost. Compare these figures while changing one input at a time, and use the related calculators below to look at the same situation from another angle.
Method and limits. This calculator applies the formula in the section above to your inputs, in your browser; nothing you enter is stored on our servers. Results are only as good as the figures you enter; use real recent numbers. It is for information, not financial, tax or legal advice.
Frequently asked questions
How can I cut car loan interest?
Choose a shorter term, a bigger down payment and a lower rate.
Can I switch between monthly and yearly?
Yes. Amount fields on this calculator can be switched between a per-month and a per-year figure, so enter whichever you know.
How do I start a budget?
List your take-home income, list every regular expense, and compare. Adjust until spending is below income with room for savings.
Are the results guaranteed?
No. Results depend entirely on the numbers you enter and the formulas shown on this page. Please do not make financial decisions based on them alone; confirm important figures with a licensed professional.
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