7 free tools
Converters
Convert between metric and imperial units for length, weight, temperature, volume, area, speed and data, and translate colours between HEX, RGB and HSL for design work.
- Unit ConverterLength, weight, temperature, volume, area, speed, time and data in one place.Popular
- Color ConverterHEX ↔ RGB ↔ HSL ↔ CMYK, with a colour picker, contrast check and shades.
- Morse Code TranslatorTranslate text to Morse code and back, and hear it played.Popular
- Binary TranslatorConvert text to binary code and binary back to text.
- Number to WordsSpell out any number in words, for cheques, invoices and homework.Popular
- Roman Numeral ConverterConvert numbers and dates to Roman numerals and back.
- Color Combination CheckerCheck if colours go together: harmony, contrast and colour blindness.Popular
Frequently asked questions
How accurate are the conversions?
They use exact conversion factors (for example, 1 inch = 2.54 cm exactly) and show results to sensible precision.