Loan Comparison Calculator
Compare up to three loan offers side by side on payment, total interest, fees and effective APR, with the cheapest total cost ranked automatically.
These offers run for different lengths of time, so their monthly payments are not directly comparable — the longer term will look cheaper each month while usually costing more overall. Compare the total cost and the fee-adjusted APR instead.
Side-by-side comparison
| Offer | Monthly | Interest | Fees + interest | Total cost | Fee-adjusted APR | Rank |
|---|---|---|---|---|---|---|
| Offer A | $493.85 | $4,631.00 | $4,631.00 | $29,631.00 | 6.900% | 1 |
| Offer B | $486.23 | $4,173.80 | $4,923.80 | $29,923.80 | 7.527% | 2 |
| Offer C | $414.20 | $4,822.40 | $5,222.40 | $30,222.40 | 6.558% | 3 |
Total cost is every payment plus the fees. The fee-adjusted APR is the rate that discounts the same payments back to the amount you actually receive after fees, so it is comparable across offers with different fee structures.
Offers with different terms are not directly comparable on the monthly payment alone — a longer term almost always looks cheaper each month while costing more overall. Estimates only, not financial advice.
What is the Loan Comparison Calculator?
The ByteTools Loan Comparison Calculator puts three offers next to each other so the cheapest one is obvious.
- Up to three offers compared on payment, interest, fees and total cost
- Fee-adjusted effective APR solved numerically for each offer
- Automatic ranking with the cheapest total cost highlighted
- Warns when offers have different terms and are not directly comparable
- Works for mortgages, car loans, personal loans and business finance
- Fully offline; offer details never leave your browser
How to use the Loan Comparison Calculator
- 1
Enter a name, amount, interest rate, term and fees for the first offer.
- 2
Fill in the second and third offers with the same details.
- 3
Read the comparison table: payment, total interest, total cost and effective APR.
- 4
Check the highlighted cheapest offer and what it saves against the priciest.
- 5
Watch for the term warning if the offers do not run for the same length of time.
About the Loan Comparison Calculator
The ByteTools Loan Comparison Calculator puts three offers next to each other so the cheapest one is obvious. Enter each offer's amount, rate, term and fees, and it amortizes all three, showing the monthly payment, total interest, total fees, total cost and a fee-adjusted effective APR for every one.
The effective APR is the important column. A loan with a headline rate of 5.9% and $3,000 of fees can easily cost more than one at 6.2% with no fees, and only an APR that folds the fees back into the rate makes that visible. The tool solves it numerically for each offer using the same present-value method lenders use.
Offers with different terms are also flagged, because a longer term always lowers the payment while raising total cost — comparing them on payment alone is the most common mistake borrowers make. Everything runs locally in your browser with nothing uploaded. Estimates only, not financial advice.
Frequently asked questions
How do I compare two loan offers properly?
Compare total cost over the same term, and compare APR rather than the headline rate. A lower monthly payment usually just means a longer term, and a lower rate can hide higher fees — the APR column folds fees back into a single comparable rate.
Why is the effective APR higher than the quoted rate?
Because fees reduce the money you actually receive while your payment stays the same. The APR is the rate that makes the smaller net amount equal the payment stream, so any fee pushes it above the nominal rate.
Can I compare loans with different terms?
You can, and the tool will do it, but be careful. A 7-year loan will always show a lower payment than a 5-year loan at the same rate while costing more overall. Compare the total cost figure, and the calculator flags mismatched terms for you.
Should I always pick the lowest total cost?
Usually, but affordability matters too. If the cheapest offer has a payment that strains your monthly budget, a slightly more expensive loan with a manageable payment may be the safer choice. Both figures are shown together for that reason.
Do lender fees always get included in APR?
It varies by jurisdiction — some fees are excluded from the legally disclosed APR. This calculator includes every fee you enter, which makes it a stricter and more conservative comparison than some official disclosures.
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