Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Monthly payment
$665.76
Loan amount
$32,450
Total interest
$7,496
Total paid
$39,946
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter vehicle price ($).
- 2Enter down payment ($).
- 3Enter trade-in value ($).
- 4Enter sales tax (%).
- 5Enter interest rate (%).
- 6Enter loan term (months).
- 7Read your monthly payment on the right — it updates as you type.
- 8Hit Share to keep the scenario or send it to someone.
About this calculator
Compute the monthly payment on a car loan from price, down payment, trade-in, sales tax, rate, and term.
Worked example
Using the values the calculator loads with:
Inputs
- Vehicle price: 35000 $
- Down payment: 5000 $
- Trade-in value: 0 $
- Sales tax: 7 %
- Interest rate: 8.5 %
- Loan term: 60 months
Results
- Monthly payment: $665.76
- Loan amount: $32,450.00
- Total interest: $7,495.69
- Total paid: $39,945.69
What each field means
Inputs
- Vehicle price ($)
- The vehicle price used in the calculation, measured in $. Starts at 35000 $ so you have a working example on load.
- Down payment ($)
- The down payment used in the calculation, measured in $. Starts at 5000 $ so you have a working example on load.
- Trade-in value ($)
- The trade-in value used in the calculation, measured in $. Starts at 0 $ so you have a working example on load.
- Sales tax (%)
- The sales tax used in the calculation, measured in %. Starts at 7 % so you have a working example on load.
- Interest rate (%)
- The interest rate used in the calculation, measured in %. Starts at 8.5 % so you have a working example on load.
- Loan term (months)
- The loan term used in the calculation, measured in months. Starts at 60 months so you have a working example on load. Accepted range: 1–120 months.
Results
- Monthly payment
- Returned as a money amount in US dollars and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Loan amount
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total interest
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Total paid
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the auto loan calculator work?
Compute the monthly payment on a car loan from price, down payment, trade-in, sales tax, rate, and term.
What do I need to enter?
6 values: vehicle price, down payment, trade-in value, sales tax, interest rate, and loan term. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the monthly payment result mean?
It is returned as a money amount in US dollars and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Auto Loan Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/auto-loan
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/auto-loan" target="_blank" rel="noopener">Auto Loan Calculator — RevenueLab</a> (2026).</p>
Source: [Auto Loan Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/auto-loan) (2026).