Converters
Roman Numeral ConverterConvert numbers to Roman numerals and back, from 1 to 3999. Checks for invalid numerals like IIII or VX and turns dates into Roman numerals for tattoos and engravings.Unit ConverterConvert between metric and imperial units for length, mass, temperature, volume, area, speed, time and data size. Exact defined factors, with every unit shown at once.Hex ConverterConvert between hexadecimal, decimal, binary and octal as you type, with support for very large numbers. Switch to text mode to turn words into UTF-8 hex bytes and back.Hat Size ChartEnter your head circumference in centimeters or inches and get your hat size in US, UK, EU and letter sizes. Includes a full size chart and simple measuring steps.
Free converters tools: Roman Numeral Converter, Unit Converter, Hex Converter, Hat Size Chart. Each one runs in your browser, shows the result as you type, and sends nothing to a server.