How Much Does It Cost? is a browser extension that automatically detects prices displayed on web pages and converts them into the user's chosen currency. Its primary function is to provide real-world context for prices by comparing the converted amount to everyday items and services, such as meals, hotel stays, or other common expenses. The extension is designed to operate silently in the background, requiring no manual activation for standard browsing. The extension offers several key features. It automatically scans pages for prices in over 50 currencies and displays a tooltip with the converted amount when the user hovers over a price. This conversion occurs in under 50 milliseconds. The tooltip also includes a contextual comparison, such as "12 lunches" or "3 nights at a hotel." A popup converter is available for manually entering and converting any amount. The extension supports multiple languages, including English, Spanish, French, German, Italian, Russian, Japanese, and Chinese, which are auto-detected from the browser. Typical use cases include online shopping, reading international news, or browsing any website where prices are listed in a foreign currency. The workflow involves a one-time installation from the Chrome Web Store, where the user selects their home currency. After this initial setup, the user browses normally. When a price is encountered, the user hovers over it to see the conversion and contextual comparison in a tooltip. The extension is designed to be lightweight and does not require user accounts or additional configuration. Technically, all price detection and conversion processing occurs locally within the user's browser. The extension does not track, log, or sell user data, and URLs are never sent to external servers. It makes a single daily request to a public exchange rate API to update currency conversion rates. The extension is available for installation from the Chrome Web Store.