Browser extension
Read unfamiliar measurements without leaving the page
Calcufetti Unit Lens adds restrained metric equivalents beside supported imperial measurements while keeping the original page values visible.
Chrome Web Store release is being prepared. Until then, this page explains how Unit Lens works and what access it uses.
How Calcufetti helps while you browse
Unit Lens
Apply Unit Lens on an ordinary web page to annotate high-confidence supported measurements with local metric equivalents.
Use one selected value
Select a measurement or supported value and send it to the Calcufetti Side Panel for an explicit conversion or calculation without retyping it.
Quick Math, Copy and scratch tape
Use lightweight calculations beside the page, copy results, and keep a session-only scratch tape while you work.
Built for trust, not page takeover
- Original page values remain visible.
- Page parsing and conversion run locally in the extension.
- No injected ads or affiliate-link replacement.
- The Free manual Lens does not request blanket access to every website.
- Calcufetti does not track what you convert.
Where Unit Lens works
Unit Lens is designed for ordinary web pages where Chrome allows the extension to run after your explicit action.
PDFs, browser-internal pages and the Chrome Web Store are not supported by the current page-processing flow.
Free is accurate. Pro is about repeated-work convenience.
Free
Manual page-scoped Unit Lens, explicit selection, Quick Math, Copy, session scratch tape and supported parser correctness remain Free.
Pro — planned
Planned Pro will focus on repeated-work convenience, starting with automatic Unit Lens on sites you choose. It is not available for purchase yet.