Technology calculators

File sizes, download times, networks and screens.

Data & Storage

Converting between bytes, kilobytes, gigabytes and more.

Data Storage ConverterConvert between bits, bytes, KB, MB, GB, TB and the binary KiB, MiB, GiB and TiB, and see why 1 TB shows as 931 GB.Open

Computer Hardware

Screens, resolutions and pixel density.

PPI CalculatorPixel density of a screen from its resolution and diagonal, with its width, height, dot pitch and aspect ratio.Open Screen Resolution CalculatorA screen’s width, height and area from its diagonal and aspect ratio, a size comparison, and the resolution for a pixel density.Open

Internet & Networking

Bandwidth, download times and subnets.

Download Time CalculatorHow long a file takes to download at a connection speed, or the speed you need to download it in time.Open Subnet CalculatorNetwork and broadcast addresses, host range and host count for an IPv4 address with a prefix or subnet mask.Open Bandwidth CalculatorHow much data a connection moves in an hour, day or 30 days, or how much bandwidth a website needs for its traffic.Open

Programming

Number systems such as binary and hexadecimal.

Binary CalculatorConvert between binary, octal, decimal and hexadecimal, and add, subtract, multiply, divide or AND, OR, XOR numbers.Open

Digital Media

Aspect ratios and image sizes.

Aspect Ratio CalculatorFind the aspect ratio of any size, or the missing width or height to resize an image or video to a ratio.Open Image Size CalculatorThe uncompressed size of an image from its pixels and colour depth, its megapixels, and its print size at a DPI.Open