About Mortgage Calculator Plus
MortgageCalculatorPlus.com is operated by ARSIDIAN LLC. We publish free educational mortgage calculators, plain-language guides, a glossary, current national rate benchmarks and state-level planning pages.
We are not a lender, mortgage broker, real-estate agent, insurer, tax adviser, law firm or financial planner. We do not approve loans or provide personal rate quotes. Calculator results are estimates based on the inputs and assumptions displayed on each page; users should verify a decision with property-specific documents and qualified professionals.
How we make the site accountable
- Our calculator methodology documents equations, assumptions and worked test examples.
- Our sources and formula changelog identifies primary datasets and material calculation changes.
- Our editorial policy explains research, review and the separation of content from advertising.
- Our corrections policy explains how to report and how we document material errors.
- Our advertising disclosure explains how the free site is supported.
If you find a factual or calculation issue, use the contact form below and include the page URL, inputs, observed result and expected result when possible.