Converters
Free online converters for length, weight, temperature, colors, numbers and more — quick, accurate unit and format conversions that work on any device.
Math Converters
Binary to Decimal to Hexadecimal Converter
Free binary, decimal and hexadecimal converter: convert numbers instantly between base 2, base 10 and base 16, including fractional values.
Morse Code Translator
Free Morse code translator: convert text to Morse code and Morse back to text instantly, with support for letters, numbers and punctuation.
Roman Numerals Converter
Free Roman numerals converter: change Roman numerals to Arabic numbers and back instantly, with the meaning of each letter explained.
Other Converters
Odds Converter
Free odds converter: switch betting odds between decimal, fractional and implied probability formats instantly, and see the chance behind any price.
DOT-number Converter
Free DOT number converter: read the last 4 digits of your tire's DOT code to find out exactly when it was made and how old it is.
Shoe Size Conversion
Free shoe size conversion chart: convert shoe sizes between US, UK, EU, Japan, cm and more for men, women and kids, in one click.
Speech to Text Converter
Free speech to text converter: type with your voice in the browser to transcribe notes, documents and more, with no download or sign-up.
Unit Converters
Length Converter
Free length converter: instantly convert between metres, kilometres, centimetres, inches, feet, yards and miles, across metric and imperial units.
RGB to HEX Converter
Free RGB to HEX converter: turn any RGB color value into its HEX code instantly, using sliders or input fields, for web and design work.
Temperature Conversion
Free temperature converter: instantly convert between Celsius, Fahrenheit and Kelvin in either direction, with the conversion formulas shown.
Weight Converter
Free weight converter: instantly convert between kilograms, pounds, grams, ounces and stones, switching easily between metric and imperial units.
Frequently asked questions
What can I convert here?
You can convert length, weight, temperature, shoe sizes, colors (RGB to HEX), number bases, odds and more, in either direction.
Are the converters free?
Yes. Every converter is completely free, with no registration or installation, on any device.
Are the conversions accurate?
Yes. Each converter uses exact, standard conversion ratios, so the results are precise.
Do the converters support metric and imperial?
Yes. The unit converters handle both metric and imperial units and convert between them instantly.
Do I need an account to use a converter?
No. All converters work straight away in your browser, with no sign-up needed.