Crochet Calc by Yasir Shafique

Convert crochet hook sizes quickly and accurately between US, UK, metric (mm), and Japanese standards. A simple, lightweight tool for crocheters and pattern readers.

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About this extension

Crochet Calc

Crochet Calc is a lightweight Firefox extension designed to help crocheters quickly convert crochet hook sizes between different international standards without opening a website or searching online.

Features
Convert hook sizes between Metric (mm), US, UK, and Japanese systems.
Clean and easy-to-use popup interface.
Fast offline calculations.
Lightweight and privacy-friendly.
No registration or account required.
No advertisements or tracking.

Whether you're following patterns from different countries or comparing hook sizes, Crochet Calc provides instant conversions directly from your browser.

Privacy

This extension does not collect, store, transmit, or share any personal information. All calculations are performed locally inside your browser.

Inspired by crochet size conversion references and designed to provide quick access for everyday crochet projects.

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