Technology
Data, networking and number-system calculators for developers, admins and students.
Download Time Calculator
Estimate how long a download takes from file size and connection speed. Converts Mbps to MB/s correctly (divide by 8) and shows time at half speed.
File Size Calculator
Convert file sizes between KB, MB, GB, TB and binary KiB, MiB, GiB, TiB. See why a 1 TB drive shows about 931 GiB — decimal SI vs binary IEC prefixes.
Storage Calculator
Estimate how many photos, songs, documents or hours of 1080p/4K video fit on a drive or memory card, using typical file sizes and usable capacity.
Binary Calculator
Convert numbers between binary, decimal, hexadecimal and octal instantly. Enter a value in any base and see all four representations side by side.
Hex Calculator
Add, subtract and multiply hexadecimal numbers, or convert hex to decimal and binary. Results shown in hex, decimal and binary side by side.