Which calculator should I use?
Start with the question you're actually trying to answer. If you want to know "what will this loan cost me per month and in total?" — for a personal loan, student loan, or any generic fixed-rate borrowing — use the loan calculator. It handles the core amortization math and shows the impact of paying extra each month.
If you're buying a home, the monthly loan payment is only part of the bill. The mortgage calculator adds the costs lenders bundle into your escrow — property taxes and homeowners insurance — plus PMI when your down payment is under 20% and HOA dues where they apply. That's the number to compare against your monthly budget, not the bare principal-and-interest figure.
Buying a car? Dealers quote payments, but the auto loan calculator works from the numbers underneath: negotiated price, your down payment and trade-in, your state's sales tax, and the fees that get rolled into the loan. Knowing the amount financed before you sit in the finance office is the single best negotiating tool you can bring.
And when you need the full picture — every payment from now until the loan dies — the amortization calculator generates a dated, exportable schedule you can check against lender statements, use for year-end interest estimates, or drop into a spreadsheet.
Why these calculators are worth bookmarking
- Instant and accurate. Results recalculate on every keystroke using the same amortization formula banks use, including correct handling of 0% promotional rates.
- Private by design. Everything runs in your browser. Your loan amounts, income assumptions, and scenarios are never uploaded, stored, or shared.
- Shareable scenarios. Every calculation gets its own link — copy it to send a scenario to a spouse, an agent, or your future self.
- Real exports. Amortization schedules download as clean CSV files that open directly in Excel or Google Sheets.
Loans are the largest financial commitments most people ever make, and the difference between a good one and a bad one is rarely visible in the monthly payment alone. Five minutes with the right calculator — comparing terms, testing extra payments, seeing the lifetime interest — routinely surfaces four- and five-figure differences. That's what these tools are for.