tooloctopus.

Auto loan calculator

Include the down payment, trade equity and financed costs.

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Auto loan calculator processes your input in this browser. Inputs and results are excluded from analytics. Recent tools save tool names, visit counts and last-visit times. Saved tools store only their names. Draft saving is optional and stays on this device; delete saved text with the draft controls. Loading text from a URL is optional and contacts that server; its URL and your IP address are visible to the server. An optional “Use in” action keeps a handoff in this tab. The next tool removes it on arrival and ignores it if more than a minute has passed.

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More inputs and assumptions

Answer

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Amount financed = vehicle price − down payment and net trade equity + financed taxes and fees. Apply the fixed monthly loan formula to that amount.

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Precision and calculation record
Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.
Saved scenario
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Formula and assumptions
Net trade equity means trade value minus its payoff balance; it may be negative. Enter taxes yourself because local rules differ. Insurance, running costs and lender-specific rounding are excluded.
Automatic precision shows money to two decimal places and other numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.
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Updated 
Using Auto loan calculator
Amount financed = vehicle price − down payment and net trade equity + financed taxes and fees. Apply the fixed monthly loan formula to that amount.
Net trade equity means trade value minus its payoff balance; it may be negative. Enter taxes yourself because local rules differ. Insurance, running costs and lender-specific rounding are excluded.
Next: Loan calculator
A worked example
With vehicle price = 25000, down payment plus net trade equity = 5000, taxes and financed fees = 2000, annual nominal interest (%) = 6, monthly payments = 60, the monthly payment is 425.32 (rounded to two decimal places).
Next: Mortgage calculator
Before you use the result
Net trade equity means trade value minus its payoff balance; it may be negative. Enter taxes yourself because local rules differ. Insurance, running costs and lender-specific rounding are excluded. Calculations keep full browser-number precision. Money amounts are displayed to two decimal places; other results use up to 12 significant digits. Very large values may lose precision.
Example results for vehicle price
These examples use Down payment plus net trade equity: 5000; Taxes and financed fees: 2000; Annual nominal interest (%): 6; Monthly payments: 60. They are reference calculations, not recommended settings.
Vehicle priceMonthly payment
12500183.66
25000425.32
50000908.64
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ToolOctopus. “Auto loan calculator.” Updated 2026-09-26. https://tooloctopus.com/auto-loan-calculator.
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