Technology

Estimate how long a file transfer takes from file size and connection speed, in seconds, minutes, hours and days.

Add, subtract and multiply binary numbers and convert between binary and decimal, with full 8-bit bit-pattern breakdowns of every result.

Add, subtract or multiply two byte-sized numbers and read the result in hexadecimal, with the result split into its high and low hex digits.

Calculate IPv4 subnet details from a CIDR prefix length including usable hosts, subnet mask, total addresses, and address block information.

Measure password strength in entropy bits and time-to-crack, and learn how to build a genuinely strong password.