Tech and web calculators
Binary and hex conversion, download time, screen size, subnet and password tools.
Binary CalculatorAdd, subtract, multiply or divide two binary numbers.Number Base ConverterConvert numbers between binary, octal, decimal and hexadecimal.Binary to Decimal ConverterConvert a binary number to decimal, octal and hexadecimal.Decimal to Binary ConverterConvert a decimal number to binary, octal and hexadecimal.Hex to Decimal ConverterConvert a hexadecimal number to decimal, binary and octal.Decimal to Hex ConverterConvert a decimal number to hexadecimal, binary and octal.Download Time CalculatorEstimate how long a file takes to download or upload at a given connection speed.PPI CalculatorCalculate the pixel density (PPI) of a screen from its resolution and diagonal size.Aspect Ratio CalculatorFind the aspect ratio of a width and height, and resize while keeping the ratio.Screen Size CalculatorFind the width, height and area of a screen from its diagonal and aspect ratio.IP Subnet CalculatorCalculate the network address, broadcast address, mask and host range of an IPv4 subnet.Password GeneratorGenerate a strong random password in your browser. Press Calculate for a new one.Hex to RGB ConverterConvert a hex colour code to RGB and HSL values.RGB to Hex ConverterConvert RGB colour values to a hex colour code.Bandwidth CalculatorEstimate the internet speed a household or office needs for its devices.