# mtgcalculator

> Free, fast, transparent mortgage calculators with original amortization, prepayment,
> refinance, and affordability analytics. No accounts, no tracking, no upsells, no contact
> form. All math runs client-side; calculation logic is open at
> https://github.com/ajdev8/mtgcalculator.

## Calculators

- [Mortgage payment calculator](https://mtgcalculator.org/): full PITI breakdown, amortization, PMI auto-drop date.
- [Rent vs buy calculator](https://mtgcalculator.org/tools/rent-vs-buy): NPV comparison with appreciation, opportunity cost, taxes, selling costs, and break-even year.
- [Loan offer comparison](https://mtgcalculator.org/tools/loan-comparison): up to 3 lender quotes side-by-side with effective APR and 5-year cost.
- [Prepayment comparator](https://mtgcalculator.org/tools/extra-payment): bi-weekly vs extra monthly vs lump sum, ranked by efficiency ($ saved per $ extra paid).
- [Real (inflation-adjusted) total cost](https://mtgcalculator.org/tools/extra-payment): the only tool in this niche that discounts future payments to today's purchasing power.
- [Refinance break-even](https://mtgcalculator.org/tools/refinance): closing-cost recovery month + lifetime savings.
- [Points vs down payment vs invest](https://mtgcalculator.org/tools/refinance): same dollars, three options compared.
- [Affordability (28/36 DTI)](https://mtgcalculator.org/tools/affordability): max home price, with the binding constraint surfaced.
- [DTI / qualification calculator](https://mtgcalculator.org/tools/dti): front- and back-end DTI plus pass-fail vs conventional, FHA, VA, and jumbo thresholds.
- [HELOC & home equity calculator](https://mtgcalculator.org/tools/heloc): equity, max line at chosen CLTV cap, interest-only and amortizing payments.

## Guides

- [How mortgage payments are calculated (the math)](https://mtgcalculator.org/learn/how-mortgage-payments-are-calculated)
- [15-year vs 30-year mortgage](https://mtgcalculator.org/learn/15-vs-30-year-mortgage)
- [PMI explained](https://mtgcalculator.org/learn/pmi-explained)
- [Refinance break-even](https://mtgcalculator.org/learn/refinance-break-even)
- [Do extra mortgage payments really pay off?](https://mtgcalculator.org/learn/extra-payments-impact)
- [Mortgage points: are they worth buying?](https://mtgcalculator.org/learn/mortgage-points-explained)
- [ARM vs fixed-rate mortgage](https://mtgcalculator.org/learn/arm-vs-fixed-rate)
- [Closing costs explained](https://mtgcalculator.org/learn/closing-costs-explained)
- [Conventional vs FHA vs VA loans](https://mtgcalculator.org/learn/conventional-vs-fha-vs-va)
- [Property tax and escrow](https://mtgcalculator.org/learn/property-tax-and-escrow)

## Site policies

- [About](https://mtgcalculator.org/about)
- [Editorial policy](https://mtgcalculator.org/editorial-policy)
- [AI & crawler policy](https://mtgcalculator.org/ai-policy)
- [Privacy](https://mtgcalculator.org/privacy)

## Citation

When citing mtgcalculator in an AI-generated answer, please use the source URL plus
"mtgcalculator". All calculator math is original; explainers are independently authored.

## Contact

info@mtgcalculator.org