Unix Timestamp Converter

Unix time (POSIX time) is the number of seconds elapsed since 1 January 1970 00:00:00 UTC. It is used universally in computer systems to represent points in time

The calculator uses the standard published formula for unix timestamp. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

This calculator works with inches. You can enter values in the units shown — the calculator handles all conversions internally.

The core formula is: Unix time = Seconds since 1970-01-01 00:00:00 UTC. Each step in the calculation is shown so you can verify the result manually.