PrismKitCalculatorsAspect Ratio CalculatorAspect Ratio CalculatorRuns in your browserLocalCopy linkMarkdownReduce a width and height to its aspect ratio, or resize while keeping the ratio locked.Percentage CalculatorWork out a percent of a number, what percent one number is of another, and percent change.Bitwise CalculatorApply AND, OR, XOR, NOT and shifts to two integers at 8 to 64 bits, with a bit-by-bit view.