Unix Timestamp Converter

A Unix timestamp is a single number that represents a point in time as the count of seconds that have elapsed since the Unix epoch, which is 00:00:00 UTC on 1 January 1970. It does not count leap seconds, so it maps cleanly to a fixed number of seconds per day. Because it is just a number in UTC, it is unambiguous across time zones and easy to store and compare.

Paste the timestamp into the converter and it returns the equivalent calendar date and time. The tool shows the result in both UTC and your local time zone, so you can read the moment however you need it. It also displays the relative time, such as how many days ago or from now the timestamp falls.

Unix timestamps are commonly stored in either seconds or milliseconds, and the digit count is the quickest signal. A 10-digit value is typically seconds, while a 13-digit value is typically milliseconds. This converter auto-detects the likely unit from the length so you do not have to guess, but you should confirm the unit your source system uses.

The Unix timestamp itself is always anchored to UTC and carries no time zone of its own. The same timestamp can be displayed as different wall-clock times depending on the viewer time zone and any daylight saving offset. This tool shows the UTC value and your local value side by side so the offset is clear.

The year 2038 problem affects systems that store Unix time in a signed 32-bit integer, which can only count up to 2147483647 seconds. That maximum is reached at 03:14:07 UTC on 19 January 2038, after which the value overflows and can wrap to a negative number. Modern systems avoid this by using 64-bit integers to store the timestamp.