Frequently asked questions

They are built and maintained by the Samsung Calculator editorial team. Every formula is taken from a published, citable source — a standards body, a regulator, a textbook or a peer-reviewed paper — and named on the page that uses it.

The arithmetic is exact to the precision your browser supports. Accuracy in practice depends on your inputs and on the assumptions a formula makes. Financial tools ignore fees and rules we cannot see; health tools use population averages that will not describe every individual. Treat every result as a well-grounded estimate, not a professional opinion.

Yes. Calculations run entirely in your browser. Nothing you type is transmitted to a server, logged or stored, and there are no third-party advertising trackers on the site.

No. There is no sign-up, no paywall and no usage limit on any calculator.

Yes. The Calculators for Your Site section provides a one-line iframe for several popular tools. They are free for personal and commercial use as long as the attribution link in the widget footer stays intact.

Use the contact form and include the calculator name, the inputs you used and the result you expected. Reported errors are checked against the source formula, and any correction is dated on the page it affects.

No. The calculators are educational tools. Consult a licensed professional — an accountant, clinician, engineer or lawyer — before acting on a number that carries financial, medical or legal consequences.

Once a page has loaded, its calculator keeps working without a connection because all the logic is client-side JavaScript.

Tools that depend on units offer both metric and US customary input, and results are shown in both wherever the conversion is meaningful.

Formulas that depend on annually published figures — tax brackets, contribution limits, mileage rates, IRS distribution tables — are reviewed each year, and the review date appears on the affected page.