About CalcArbor

CalcArbor is a free collection of 15 web-based tools hosted at calcarbor.com. Every tool runs entirely inside your browser — no files are uploaded to any server, no accounts are required, and no data is stored on our end.

How it works

Each tool is a self-contained HTML, CSS, and JavaScript page. When you open a tool, your browser downloads the page once and then all computation happens locally on your device. The tools work offline after the first load on browsers that cache pages.

Privacy

Because everything runs client-side, we never receive the data you type into the tools. We may use analytics to understand aggregate traffic (page views, not personal content). See our Privacy Policy for full details.

Accuracy

Tools are built to be practically useful, but they are not substitutes for professional financial, medical, or legal advice. Always verify important numbers with a qualified professional.

Questions or feedback? Reach us at hello@calcarbor.com.