What we make
Calculatort publishes single-purpose calculators for money questions: loans, savings, pay, tax arithmetic, investing, business metrics, and currency. Each page does one job and shows its working.
How the tools are built
Every calculator is plain HTML, CSS, and JavaScript with no external libraries and no tracking. The page loads, the tool works, and the numbers stay in your browser. Pages are small enough to be usable on a slow connection.
How the numbers are checked
Before a page is published, an automated gate recalculates every tool's default example with a second, independently written implementation of the same formula and refuses the release if the two disagree. The same gate verifies that the example printed in the text matches what the tool actually outputs, so the prose cannot drift away from the code.
What we do not do
No accounts, no newsletters, no analytics products, and no selling of data. The site carries advertising, which is disclosed in the privacy policy, and that is the whole of the business model.
Corrections
Found a mistake? Write to [email protected] with the page and the inputs. Corrections are made in the code and republished, not patched by hand on one page.