Smarter Car Buying
Starts Here
Free auto finance calculators for car buyers and dealers. No signup. No spreadsheets. Instant results.
Top Picks
Most-Used Calculators
Car Affordability Calculator
Find your real vehicle budget based on income and existing debts, before you start shopping.
Auto Loan Payment Calculator
Monthly payment, total interest paid, and a full amortization schedule for any loan.
Buy vs. Lease Comparison
Full side-by-side cost comparison over your entire ownership timeline. Know before you sign.
Are you a dealer? We have 5 professional-grade tools for structuring deals, evaluating trades, and tracking inventory profit.
See dealer tools →Complete Library
Browse All Calculators
Why Us
Built for Real Deals
Not toy calculators. These are the same numbers Karket runs on every deal, surfaced as free tools.
Instant Results
Every calculation updates in real time. No page loads, no waiting, no friction.
100% Private
Nothing you enter is stored or transmitted. These calculators run entirely in your browser.
Dealer-Grade Accuracy
Formulas validated against real F&I math, the same logic used on actual deals at Karket dealerships.
No Signup Required
Open any calculator and start immediately. No account, no email, no paywall.
For Dealers & Buyers
Dealer desk tools for structuring and profiting deals. Buyer tools for informed decisions.
Always Up to Date
Maintained by the Karket team. New tools added regularly as dealership needs evolve.
From the Lot
What Dealers & Buyers Say
"I run the Payment Quote Calculator on every deal before my customer even sits down. It sets expectations and closes faster. Wish I had this years ago."
Marcus R.
Dallas, TX · Finance Manager
"The Buy vs. Lease tool showed me I was actually better off leasing by $4,200 over three years. Numbers don't lie. Made the decision easy."
Jamie L.
Phoenix, AZ · Car Buyer
"The Holding Cost Calculator changed how I think about aging inventory. I used to guess. Now I know the exact day a unit becomes a problem."
Devon T.
Atlanta, GA · Used Car Dealer
FAQ
Common Questions
Built into Karket
All of This Is Built Into Karket. Automatically.
Karket is the dealership platform that structures deals, tracks inventory, manages forms, and runs your back office, without the spreadsheets.
16+
Calculators
100%
Free
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Signup needed