Auto Tools

Auto Loan Interest Calculator

Estimate monthly payment, total interest paid, and total amount paid on a car loan from the financed amount, APR, and term.

Updated April 11, 2026
Free online tool
Planning and research use

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Why this page exists

A car loan can feel manageable when you focus only on the monthly payment. This calculator helps you look past that first number and estimate the monthly payment, total interest, and total amount paid so the real borrowing cost is easier to compare.

Interactive tool

Run the estimate

Enter your numbers and read the result first, then use the sections below to understand what affects the outcome.

Calculator

Auto loan interest calculator

Estimate monthly payment, total interest, and total amount paid on a car loan from the financed amount, APR, and term.

Result

$482

Estimated monthly payment and loan cost based on the financed amount, rate, and term entered.

Estimated monthly payment$482

Total interest paid$5,948

Total amount paid$34,698

Loan amount$28,750

At 6.40% over 72 months, interest adds about $5,948 to the borrowed amount.
A longer term can lower the monthly payment while still raising the total loan cost, which is why comparing both numbers matters.
If you want the full out-the-door vehicle estimate too, compare this result with the car payment calculator next.

This estimate focuses on principal and interest only. Taxes, dealer fees, insurance, and add-ons are not included unless already built into the loan amount.

Planning note

Last updated April 11, 2026. Use this tool to compare scenarios and plan ahead, then confirm important details with the lender, employer, insurer, contractor, or other qualified provider involved in the final decision.

How it works

What the calculator is doing

Enter the financed vehicle loan amount, APR, and loan term in months.

The calculator uses standard amortized-loan math to estimate the monthly payment and total cost over the full term.

Review the monthly payment next to total interest so you can see whether the term still fits your budget and long-term cost tolerance.

Understanding your result

Monthly payment matters for budgeting, but total interest often decides whether the loan still feels reasonable. Looking at both makes it easier to compare a lower payment against the true long-term cost.

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Examples

Ways people use this tool

Example scenarios help turn a quick estimate into a more useful comparison or planning step.

Compare a 60-month and 72-month loan

Use the same loan amount at two common terms to see how a smaller payment can still raise the total interest materially.

Check a loan offer before signing

Run the financed amount, APR, and term to estimate the total cost before focusing on the monthly payment alone.

Use the result with a vehicle budget

Compare the payment here with the car affordability calculator if you want to see whether the loan really fits your monthly cash flow.

FAQ

Common questions

Should I enter the vehicle price or the loan amount?

Enter the financed loan amount after any down payment, rebate, or trade-in has already reduced the balance being borrowed.

Does this include taxes and dealer fees?

Only if those charges are already built into the financed amount you enter. Otherwise, this estimate focuses on principal and interest only.

Why does a longer term cost more even with a lower payment?

Because interest has more months to build, which can make the total paid meaningfully higher even when the payment feels easier month to month.

Related tools

Keep comparing

Use these related tools to compare nearby scenarios, check a second estimate, or keep narrowing down the right decision.

Auto ToolsUpdated April 11, 2026