Ask Khulasa
Get instant, formula-backed answers on fuel costs, auto loan APRs, lease money factors, depreciation, and out-the-door car budgets.
Ask Khulasa computes real-time automotive cost estimates using our built-in mathematical engine and directs you to the exact calculator for your scenario. For full interactive modeling, choose any of the 15 calculators below.
Car Cost & Auto Finance Calculators
Fifteen transparent, browser-based automotive calculators built on standard US auto-lending amortization, EPA fuel-economy equations, and compound depreciation models, with zero sign-up required.
Fuel Cost Calculator
Estimate total gallons required, total fuel spend, and fuel cost per mile for any daily commute or point-to-point drive.
Open Calculator
Fuel Consumption Calculator
Measure your vehicle's true pump-to-pump fuel economy in US MPG and metric L/100km from a real fill-up receipt.
Open Calculator
Road Trip Fuel Cost Calculator
Budget multi-state highway fuel expenses, account for mountain and cargo load penalties, and split gas costs evenly across passengers.
Open Calculator
Car Loan Calculator
Calculate your exact monthly auto loan payment, net principal financed, total loan cost, and cumulative interest paid across any APR and loan term.
Open Calculator
Monthly Car Payment Calculator
Calculate your real dealership out-the-door monthly payment with state sales tax, trade-in tax credit, and DMV/dealer fees rolled into the loan.
Open Calculator
Car Depreciation Calculator
Project your vehicle's year-by-year resale value and cumulative value loss using compound declining-balance depreciation.
Open Calculator
Total Cost of Car Ownership Calculator
Combine compound depreciation, fuel, auto insurance, maintenance, registration fees, and loan interest into one multi-year Total Cost of Ownership (TCO).
Open Calculator
Car Maintenance Cost Calculator
Project multi-year vehicle maintenance, tire, and wear-item spending by combining time-based annual service costs and mileage-driven wear rates.
Open Calculator
Cost Per Mile Calculator
Calculate your true operating and fixed cost per mile across fuel, maintenance, insurance, and depreciation for commuting, rideshare, or business mileage.
Open Calculator
Fuel Savings Calculator
Compare annual and 5-year fuel spending between two vehicles (Vehicle A vs. Vehicle B) and calculate how long a hybrid or fuel-efficient upgrade takes to pay for itself.
Open Calculator
Car Affordability Calculator
Calculate the maximum monthly car payment, maximum auto loan principal, and maximum vehicle price that fit safely inside your income and debt-to-income ceiling.
Open Calculator
Lease vs Buy Calculator
Compare the net out-of-pocket cost of leasing a car versus buying and financing it over the exact same time horizon, accounting for retained resale equity.
Open Calculator
EV vs Gas Cost Calculator
Compare annual energy costs, maintenance spend, and multi-year total cost between an Electric Vehicle (mi/kWh) and a Gasoline Vehicle (MPG).
Open Calculator
Car Trade-In Value / Equity Calculator
Calculate your positive or negative trade-in equity (upside-down loan balance) and see how it changes the amount financed on your next vehicle.
Open Calculator
Car Registration & Tax Calculator
Calculate state and local auto sales tax, DMV title and registration fees, dealer documentation fees, and your true out-the-door (OTD) vehicle price.
Open CalculatorWhy Drivers & Car Buyers Use Khulasa
Dealership four-square worksheets are designed to hide total loan interest, rolled-in negative equity, marked-up lease money factors, and uncapped documentation fees behind a single monthly payment number. Khulasa puts the exact mathematical formulas used by bank underwriters and corporate fleet managers directly in your browser. Every calculator includes verified step-by-step math and 2026 US benchmark tables (from state-by-state trade-in sales tax credits to five-year wholesale residual curves) so you can audit any car deal before you sign.
Latest Automotive Finance & Ownership Analysis
Original research and showroom teardowns on auto loans, state sales tax rules, hybrid & EV payback horizons, and multi-year ownership costs.
Why Dealerships Charge $995 for GAP Coverage Your Auto Insurer Sells for $28 a Year, and Exactly When You Need It
Guaranteed Asset Protection (GAP) can save a low-down-payment buyer from a $5,850 deficiency bill after a total loss. The mistake is paying a dealership $995+ for coverage your auto insurer sells for $28 a year.
The Two-Point Dealer Reserve Markup: Why Walking Into a Showroom Without a Credit Union Pre-Approval Costs $2,150
When a bank approves your auto loan at a 5.65% wholesale 'buy rate,' indirect lending rules allow the dealership finance manager to quote you 7.65% APR and pocket the $2,150 difference. Here is how to eliminate that markup in 15 minutes.
The $0.70 IRS Mileage Deduction vs. Your Car's Real Cost Per Mile: How Rideshare and Self-Employed Drivers Misprice Depreciation
Logging 25,000 business or rideshare miles generates a $17,500 Schedule C tax deduction at the $0.70 IRS mileage rate, while quietly draining $0.31 to $0.67 per mile in real depreciation and running costs.
78 MPH on I-80 and Winter-Blend Gas: Why Your SUV's Real-World Fuel Economy Drops 22% Below the Window Sticker
Federal testing rules allow automakers to certify 'Highway' window-sticker MPG at an average speed of just 48.3 mph. Add 78-mph aerodynamic drag and winter butane fuel blends, and real-world SUV fuel economy drops 22% to 24%.
0% APR Financing vs. $3,500 Customer Cash: When Taking the Rebate and a Credit Union Loan Beats 'Free Money'
Does a 0% APR financing offer really beat a $4,000 factory cash rebate paired with a credit union loan? We run the 60-month amortization schedule and show why trading in at Month 30 flips the winner.
Rolling $6,200 of Old Car Debt Into a New Loan: Why 'We'll Pay Off Your Trade' Costs $8,100 and How to Exit Cleanly
The average underwater trade-in at US dealerships now carries over $6,200 in unpaid debt. When a dealer promises to 'pay off your old loan,' rolling that $6,200 into a new 72-month contract actually costs $8,928.
More In-Depth Guides & Case Studies
