Calculators
6 toolsConvert units of measurement, timestamps and number bases, work out date differences, and calculate percentages and IP subnets.
Date Calculator
Calculate differences between dates and determine age.
Number Base Converter
Convert whole numbers of any size between decimal, hexadecimal, binary, octal and any base up to 36, and read their bytes, bit widths and two's complement.
Percentage Calculator
The six questions percentages are asked in, each on its own line, including the two that work backwards to the number you started from.
Subnet Calculator
Work out the network, the host range, the broadcast address and the masks of an IPv4 or IPv6 subnet, and whether another address is in it.
Timestamp Converter
Convert a Unix timestamp to a date and back, in seconds, milliseconds, microseconds or nanoseconds, and read any date as ISO 8601, as an HTTP date and in any time zone.
Unit Converter
Convert between units of measurement: length, weight, temperature, data storage, and more.