Convertal

Fast unit converter — popup, right-click any quantity, or type cv in the address bar. Nothing leaves your browser.

Convertal converts units the moment you need it, without leaving the page. Open the popup for a live two-way converter (type in either box), select any quantity on a page — like "26.2 miles" or "72°F" — and right-click to convert it instantly, or type `cv 180 lb to st` straight into the address bar and read the answer in the suggestion. Free categories: Length, Mass and Temperature, with every common unit and sensible defaults for your region (metric, US or UK). PRIVATE BY DESIGN Nothing you convert is uploaded or stored. There are no network permissions at all — conversion happens entirely inside your browser. Only your unit preferences are remembered. Want more? The Convertal app for iPhone and Android adds 20+ categories — area, volume, speed, data storage, energy, pressure, currency and more — details at convertal.co.uk.