Auto & Vehicle Finance Calculators
Transparent, zero-clutter tools to help you navigate dealership quotes, calculate accurate loan amortization, evaluate leasing economics, and budget travel fuel expenses.
Featured Automotive Tools
Car Payment Calculator
Calculate monthly payments, total interest, sales tax with trade-in credits, and compound interest savings from early principal payments.
Car Affordability Calculator
Determine how much car you can afford based on gross annual income or monthly budget, with 20/4/10 rule guidance and sales tax offsets.
Car Lease vs Buy Calculator
Compare the true 3-year net out-of-pocket costs of leasing versus financing, factoring in monthly payments, depreciation, and retained asset equity.
Road Trip Gas Calculator
Estimate total highway fuel consumption, budget gas costs, and split fuel expenses fairly per passenger with 1-click summary sharing.
Pre-Computed Car Loan Estimates by Budget
Explore detailed amortization schedules and typical vehicle models for common financing amounts:
Popular US Highway Road Trip Fuel Calculations
Exact driving distances, driving hours, and fuel cost splits for America's most popular travel corridors:
The 20/4/10 Rule for Automotive Affordability
Auto loans have stretched from an average of 48 months a decade ago to 68+ months today, with some lenders pushing 84-month terms. Financial advisors recommend using the 20/4/10 rule to keep vehicle financing from derailing your personal budget:
Down Payment
Put down at least 20% in cash or trade-in equity to avoid immediate negative equity from first-year depreciation.
Maximum Term
Finance the vehicle for no longer than 48 months to minimize total compound interest and pay off the car before major maintenance.
Income Cap
Total automotive operating expenses (monthly loan payment + insurance + fuel) should stay below 10% of gross monthly income.