Epoch Timestamp Converter
Convert a date to Unix timestamp and back.
Seconds1786460460
Milliseconds1786460460000
UTC ISO2026-08-11T15:01:00.000Z
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How is this result calculated?
A Unix timestamp, also called epoch time, represents the number of seconds or milliseconds elapsed since January 1, 1970 at 00:00:00 UTC.
APIs often use seconds for compact fields, while JavaScript uses milliseconds with Date.now(). Checking the unit avoids dates that incorrectly land in 1970 or far in the future.
UTC time is independent of time zone. Local time is only a presentation of the same value for your region.
Frequently asked questions
What is the difference between seconds and milliseconds timestamps?+
A millisecond timestamp is 1000 times the equivalent seconds timestamp. JavaScript usually uses milliseconds.
Why show UTC?+
UTC lets you compare dates without depending on the user's time zone.
What is an epoch timestamp used for?+
It is used to store, sort and transmit dates in logs, databases, APIs and distributed systems.