Unit Conversion for Safari

A recipe in Fahrenheit, a hike in miles, a parcel weight in pounds, and you stop reading to work out what that is.
Unit Conversion for Safari shows the metric or imperial equivalent right next to the number on the page, while you browse. Nothing to copy, nothing to look up.
It converts both ways: Fahrenheit or Celsius, miles or kilometers, pounds or kilograms, both are shown so you understand the measurement at a glance.

Examples

70°F (≈ 21°C)
25°C (≈ 77°F)
5 miles (≈ 8 km)
10 km (≈ 6.2 mi)
10 lb (≈ 4.5 kg)
1 gallon (≈ 3.78 L)

Key Features

Automatic unit detection on web pages
Bidirectional conversion between metric and imperial units
Supports temperature length weight and volume conversions
Inline display or hover display modes
Click converted values to copy
Enable or disable conversion for specific websites
Category control for temperature length weight and volume
Fast local processing with no external communication

Unit Conversion for Safari is designed to be lightweight, fast, and privacy friendly. All processing happens locally in your browser with no data collection.

The extension supports multiple languages and automatically adapts to your system language.

Perfect for reading international articles, shopping online, DIY tutorials, technical documentation, and global news.