Computer & IT calculators
Number systems, data storage, IP subnets, transfer time, screens and PC power.
Aspect Ratio & Image Resize CalculatorSimplest aspect ratio, nearest common ratio, resized and cropped image dimensions.Computer & ITBinary Arithmetic CalculatorAdd, subtract, multiply or divide two binary numbers, with results in binary and decimal.Computer & ITBinary, Decimal, Hex & Octal ConverterConvert whole numbers between base 2, 8, 10 and 16 — exact for any size, with two’s complement.Computer & ITBits, Bytes & Storage Unit ConverterConvert bits and bytes between decimal (KB, MB, GB) and binary (KiB, MiB, GiB) units.Computer & ITCIDR & Subnet Mask ConverterCIDR prefix ↔ subnet mask, with wildcard mask, host bits and number of addresses.Computer & ITData Transfer & Download Time CalculatorHow long a download, upload or network copy takes, from file size and link speed.Computer & ITDownload Speed Converter (Mbps ↔ MB/s)Convert Mbps to MB/s and back, and see the practical speed you might actually get.Computer & ITImage, Audio & Video File Size CalculatorExact uncompressed size of images, audio and raw video, or a bitrate-based estimate.Computer & ITIPv4 Subnet & Address Range CalculatorNetwork, broadcast and usable host range of an IPv4 subnet from CIDR or subnet mask.Computer & ITIPv6 Address Expander, Compressor & Prefix ToolValidate, expand and compress IPv6 addresses, identify the type, and find a prefix’s range.Computer & ITPC Power Supply (PSU) Wattage EstimatorAdd up PC component power, apply headroom and find a suitable power supply size.Computer & ITScreen PPI & Pixel Density CalculatorPixels per inch, dot pitch and physical size of a screen from resolution and diagonal.Computer & IT
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