Free Online Calculators and Utilities
Quick calculators for numbers, dates and measurements: percentages, exact age, the time between two dates, unit conversion, BMI, aspect ratios and color codes, plus a random number generator and a password generator.
Results appear instantly in the page. Health and finance-style figures such as BMI are general information, not professional advice.
Percentage CalculatorWork out a percentage of a number, what percent one number is of another, or the percentage change between two values.Age CalculatorCalculate age in years, months and days from a birth date.Date Difference CalculatorFind the time between two dates in years, months, days and total days.Unit ConverterConvert common length, weight, volume and temperature units.Random Number GeneratorGenerate random whole numbers or decimals within a range.Password GeneratorCreate random passwords of the length you choose, generated with your browser’s cryptographic random source.BMI CalculatorCalculate body mass index from weight and height in metric or imperial units.Color ConverterConvert a color between HEX, RGB and HSL.Aspect Ratio CalculatorSimplify a width and height to a ratio and scale to a new width.