Mortgage & Amortization Calculator
Calculate principal-and-interest payment, lifetime interest and remaining balance at any year.
The ZIP includes the tool, instructions, license and example project.Monthly P&I + amortization position
- Loan amount
- Interest rate
- Term
- Balance year
| Total of all payments | $431,116 |
| Total interest over full term | $251,116 |
| Balance at selected year | $169,437 |
| Principal paid by selected year | $10,563 |
| Interest paid by selected year | $61,290 |
- One HTML file — double-click to open in Chrome, Edge, Firefox or Safari. No install.
- Works fully offline. No account, no subscription, nothing sent anywhere.
- Bilingual — switch English / Spanish with one click.
- Save unlimited scenarios (one property each) and compare them side by side.
- Save / Open your work as a file you own — Documents, Dropbox, USB.
- Clean one-page Print / PDF report.
- Instructions in English and Spanish, license and example file included.
FIXED-RATE AMORTIZATION
The payment follows the standard fixed-rate amortization formula. Early payments are interest-heavy; the balance view shows how much principal is actually gone by the selected year. Taxes, insurance, mortgage insurance and HOA are not part of principal and interest.
CRIM Property Tax Estimator
Estimate the annual CRIM contribución from the assessed (1957) value, exemption and your municipality's rate — before you buy, bid or sign.
Max Bid Calculator
The most you can bid and still hit your minimum profit. Write it down before the auction — never bid a dollar past it.
Fix & Flip Calculator
Net profit and ROI from purchase, rehab, holding, closing, ARV and selling costs — the costs beginners forget, included.
BRRRR Calculator
How much cash you pull back out at the refinance, and whether the property still cash-flows after.