Convert between US letter, metric millimeter, and UK crochet hook sizes.
Convert between US letter, metric millimeter, and old UK crochet hook sizes. Includes a complete cross-reference table for all standard hook sizes.
Copy the code below and paste it into your website or blog. The calculator will work directly on your page.
We use cookies for analytics and ads to improve your experience. Your calculator data stays in your browser — we never collect it.