Unit Converter

Convert length, weight, temperature, speed, data storage, and time units instantly. Metric-first. 100% free.

Unit Converter is a fast, lightweight Chrome extension for converting between common units. Metric-first defaults make it ideal for international users, scientists, and developers. 6 Categories, 40+ Units: - Length: mm, cm, m, km, inch, foot, yard, mile - Weight: mg, g, kg, metric ton, oz, lb - Temperature: Celsius, Fahrenheit, Kelvin - Speed: m/s, km/h, mph, knots - Data Storage: bytes, KB, MB, GB, TB, PB - Time: seconds, minutes, hours, days, weeks, months, years Key Features: - Live conversion as you type - All conversions displayed at once in a conversion table - One-click swap between input and output units - Copy any result with a single click - Recent conversions history (last 5) - Clean dark theme UI - No permissions required — runs entirely in the popup - No ads, no tracking, no data collection Why Unit Converter? - Metric-first: defaults to km, kg, Celsius (not imperial) - Instant: no loading, no server calls, 100% offline - Lightweight: under 20 KB total - Privacy: zero permissions, zero network requests