Financial Calculators & Insights for United States

Explore practical financial tools and plain-English guides for United States. Compare loan scenarios, estimate payments, and make informed money decisions with clearer numbers.

Check the deal before you sign

Have a written car quote? Check the purchase total, trade-in debt and amount financed, then compare two offers.

Open the car deal & OTD checker →

Free, no sign-up. Use the tax and fee amounts from your quote.

Understand the purchase price

Separate the out-the-door total from cash down, trade-in and financing.

Compare two offers

See how payment, interest and cash upfront change together.

Follow trade-in debt

Track an unpaid balance into the new loan without counting it twice.

Check the cost of add-ons

Compare the product price with its cost when financed.

Check a GAP refund and credit

Use a confirmed method to estimate the amount and trace the payment.

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Auto US finance

Extended Warranty Refund: Check the Math and Track the Credit

By Daniel Rufyne - Oct 10, 2026

Check an extended warranty refund using your contract’s time, mileage, claims and fee rules, then trace the payment to your lender or your own account.

Auto · Oct 10, 2026

Auto Loan Payoff Quote and Title Release: What to Check Before You Sell, Refinance, or Trade In

Auto loan payoff quote guide: understand payoff amount, per diem interest, car title after loan payoff, lien release, DMV steps, and wh...

Auto · Oct 6, 2026

Trade In a Car With Negative Equity: Costs and Options

Follow a $4,000 trade-in shortfall, calculate its financing cost, and test whether waiting six months reduces the gap under different t...

Auto · Oct 6, 2026

Compare Auto Loan Offers: Payment, Rate and Total Cost

Compare written car loan offers with two worked examples: lower payment versus longer term, and lower interest rate versus a higher pur...

Out-the-Door Car Price: Read and Check a Dealer Quote

Updated Oct 5, 2026 By Loanyzer editorial team

Use an annotated car quote to separate purchase price, deposit, trade-in debt and amount financed. Check the numbers before comparing loan payments.

Negative Equity on a Car Loan: Compare Your Options

Updated Oct 2, 2026 By Daniel Rufyne

Biweekly Car Loan Calculator: Excel Comparison Worksheet

Updated Oct 1, 2026 By Jaime de Souza

Powerful Financial Calculators

Estimate loan payments, compare scenarios, and understand the trade-offs before you borrow.

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Car Loan Calculator

Estimate monthly car payments, total interest and amortization using your own APR assumptions. Educational calculator only; not a lender quote or approval tool.

Open the calculator Research tool

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Mortgage Affordability

Use Loanyzer mortgage affordability guidance to estimate home budget with income, debt, down payment, rate, taxes, insurance, HOA, and DTI assumptions.

Open the calculator Research tool

Educational, not financial advice. Outputs are estimates produced from your inputs. Actual lender offers depend on your credit, the property, and current market conditions.

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