Unit Converter
Convert between units of length, weight, temperature, area, volume, speed, data and time. Real-time results.
Real-time conversion
Results update instantly as you type. No buttons to click, no round-trips to a server. Everything runs locally in your browser.
Precision matters
Conversions use IEEE 754 double-precision floating-point arithmetic, giving you up to 15 significant digits of accuracy for every result.
8 categories, 60+ units
From millimetres to miles, bits to petabytes, and milliseconds to years. All the everyday and scientific units you need in one place.