Converters & Generators
Currency, unit, time zone and colour converters, plus password, random number, dice and spin-the-wheel generators.
Random Number GeneratorPick random numbers in any range, with or without repeats.Unit ConverterLength, weight, area, temperature, volume, speed and 4 more.Roman Numeral ConverterNumbers and dates to Roman numerals and back, 1 to 3999.Binary CalculatorBinary arithmetic plus binary, decimal, hex and octal conversion.Currency ConverterLive rates for USD, INR, AED, EUR, GBP and 35 more currencies.Time Zone ConverterConvert IST, EST, PST, GMT and 50 zones with DST handled.Color PickerHEX, RGB, HSL, CMYK codes, palettes and contrast checks.Password GeneratorStrong random passwords or word passphrases, with entropy.Dice RollerRoll 1–10 dice: d6 with dots, d20, d100 and more.Spin the WheelRandom name picker wheel for names, numbers and choices.
Free online converters calculators
All 10 converters tools on CodingMarble Calculator are free, need no sign-up and work on mobile: Random Number Generator, Unit Converter, Roman Numeral Converter, Binary Calculator, Currency Converter, Time Zone Converter, Color Picker, Password Generator, Dice Roller, Spin the Wheel.