All tools · 💰 Finance
💳 Loan Amortization
For any fixed-rate loan: enter the principal, annual rate, and term in years. Get monthly payment, total interest paid over the life of the loan, and an amortization table showing principal vs interest each month.
Examples
$30,000 @ 6.5% × 60 moMonthly $587 · Total interest $5,200$50,000 @ 5% × 10 yrMonthly $530 · Total interest $13,640Frequently asked questions
How is the monthly payment calculated?
Standard amortization: P × r / (1 − (1+r)^−n), where P is principal, r is monthly rate, n is total payments.
Why is most of my early payment going to interest?
Interest is computed on the remaining balance each month. Early on, balance is high so interest is high. As you pay down principal, more of each payment goes to principal.
Should I refinance?
Generally worth it if a new rate is at least 0.5-1% lower AND you plan to keep the loan long enough to recoup closing costs. Use our Refinance Calculator to model.
About this tool
Loan Amortization runs entirely in your browser using standard Web APIs. No data is sent to any server. The source for this tool is in our public GitHub repository.
Related tools
- 🏠 Mortgage Calculator — Monthly mortgage payment with amortization breakdown. Principal, interest, taxes, insurance.
- 🚗 Auto Loan Calculator — Car payment with down payment, trade-in, sales tax, and term.
- 💳 Credit Card Payoff Calculator — How long to pay off a credit card balance? Compare minimum vs aggressive payments.
- 🔄 Mortgage Refinance Calculator — Should you refinance? Break-even months from rate drop + closing costs.
Why this tool
vs typical free web-tool sites
| 1vw | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for premium features) |
| Ads inside the tool | No | Yes (banner + video) |
| Data sent to server | No (browser-only) | Yes (inputs analyzed for ads) |
| Total tools | 96 | Often <20 or scattered across sites |
| Bookmarkable URL per tool | Yes | Mixed |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Open source | Yes | No |