Simple Car Loan Calculator — Compare Rates & Terms
What it is
A Simple Car Loan Calculator helps you estimate monthly payments, total interest, and overall cost for different loan amounts, interest rates, and terms — presented in an easy-to-use interface so you can quickly compare options.
Key inputs
- Loan amount (principal)
- Annual interest rate (APR)
- Loan term (months or years)
- Down payment (optional)
- Trade-in value or fees (optional)
What it calculates
- Monthly payment using standard amortization formula
- Total interest paid over the loan life
- Total cost (principal + interest + fees)
- Amortization schedule (optional): principal vs. interest per payment
- Comparison view: side-by-side results for different rates/terms
How monthly payment is computed
Monthly payment P:
Code
P = rL / (1 - (1 + r)^-n)
Where:
- r = monthly interest rate (APR/12)
- L = loan amount after down payment/trade-in
- n = total number of monthly payments
When to use it
- Compare financing offers from lenders or dealers
- Decide between shorter term with higher monthly but less interest vs. longer term with lower monthly but more interest
- Test impact of larger down payment or lower rate on monthly cost
Tips for meaningful comparisons
- Include all fees and taxes in loan amount for apples-to-apples totals
- Compare APRs (includes some fees) rather than nominal rates when possible
- Run scenarios with different terms (36, 48, 60, 72 months) and at least one lower interest-rate scenario
- Check amortization to see how much principal is paid early vs. later
Quick example
- Loan amount: \(25,000; APR: 5% (0.05); Term: 60 months</li> <li>r = 0.05/12 = 0.0041667; n = 60</li> <li>Monthly payment ≈ use formula above to compute ≈ \)471
Common features in online tools
- Exportable amortization table (CSV/PDF)
- Graphs: balance over time, interest vs. principal
- Side-by-side comparison mode
- Option to include extra monthly or one-time payments
If you want, I can generate an amortization table or run specific scenarios for particular loan amounts, rates, and terms.
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