Frequently Asked Questions

Yes. Every calculator on CalcDomain is free. There is no sign-up, paywall, or download, and the site is supported by display advertising rather than subscriptions.

Yes. Each calculator runs entirely in your browser. The computation happens on your own device using the same code that passes our automated tests.

The values you enter are used to compute a result locally and are not sent to a CalcDomain server. If you choose to send feedback and include an email address, that is used only to reply to you. Full detail is in our Privacy Policy.

Each calculator is generated from a documented formula and a shared archetype, then gated by contract tests: it cannot ship unless it reproduces known-correct reference cases within a strict tolerance and handles edge cases without producing a silent wrong number. The method is described in the Editorial Policy.

When a calculator needs external data — tax brackets, benchmark rates, fee schedules — it comes from a ranked hierarchy of sources, official publishers first. Each dataset records its publisher, effective date, and retrieval date.

Data is stored as dated snapshots rather than live feeds, so a calculation is reproducible. Every figure is labelled with the date it applies to, and each page shows when it was last updated.

CalcDomain gives an educational estimate from public formulas and dated snapshots. A lender, tax authority, or provider may use rules, rounding, fees, or figures specific to your account and more current than a snapshot. Treat their numbers as authoritative for your situation.

No. The calculators are educational tools and do not replace professional financial, tax, legal, medical, engineering, or accounting advice. They cannot account for every detail of your circumstances — confirm important figures with a qualified professional or the primary source.

Use the form on the Contact & Feedback page, or email contact@calcdomain.com. Confirmed errors are corrected once they are verified, and the affected page's update date is revised.

The calculator name or page URL, the exact inputs you entered, the result you saw, and the result you expected with a short note on why. If your expected result comes from a source or worked example, include it. Please do not send confidential or sensitive information.

Yes. Suggestions for new tools, or for ways an existing tool could be clearer, are welcome through Contact & Feedback. They help us decide what to build next.

Yes. Most calculator pages include an "Embed this calculator" block with a copyable snippet. The embed carries a neutral attribution link back to the original CalcDomain page for methodology, updates, and source notes.

You may use the site for personal and business purposes, including embedding calculators. You may not scrape destructively, misattribute the work, route it through deceptive proxies, or republish content at scale without permission. The full terms are on the Terms of Service page.

CalcDomain is self-funded and supported by display advertising (Google AdSense). Advertising does not influence formulas, calculator outputs, source selection, or editorial conclusions, and advertising is kept separate from editorial content.

CalcDomain may use AI-assisted workflows for drafting, formatting, test generation, and QA support. AI is a tool in the process; final responsibility for published formulas, sources, and editorial decisions remains with CalcDomain's editor.

CalcDomain is operated by Fidamen, a brand of Yeah Up S.r.l., based in Udine, Italy. Editorial responsibility rests with Ugo Candido, founder and editor-in-chief. More is on the About page.

Yes. Public build activity — calculator checks and dated-source updates — is logged on the Changelog.