HomeCalculatorsCalculatorsSolve common numeric, ratio, statistical, and conversion tasks locally.15 tools01Percentage calculatorCalculate a percentage of any number.02Percentage changeMeasure increase or decrease from an old value to a new one.03Aspect ratio calculatorReduce dimensions and calculate a matching side.04Average calculatorCalculate the arithmetic mean of a number list.05Ratio calculatorReduce a two-part whole-number ratio.06Fraction to decimalConvert a fraction into decimal and percentage form.07Decimal to fractionApproximate a decimal as a reduced fraction.08Scientific notation converterConvert numbers to and from scientific notation.09Standard deviation calculatorCalculate population and sample standard deviation.10Mean, median & modeSummarize a number list with central-tendency metrics.11Random number generatorGenerate secure random integers within a range.12Tip calculatorCalculate tip, total, and equal split per person.13Discount calculatorCalculate savings and final price after a discount.14Data size converterConvert bytes between decimal and binary storage units.15Temperature converterConvert Celsius, Fahrenheit, and Kelvin values.