Unix Timestamp Converter

Convert epoch time to a readable date, or a date and time to a Unix timestamp.

What Do You Want to Find?
Seconds (10 digits) or milliseconds (13 digits) are detected automatically.
Timestamps are whole seconds or milliseconds.
–
Result
UTC
Your time zone
ISO 8601
Seconds
Milliseconds
Relative to now
Work

Saved Calculations

Items you add are saved in this browser.

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How Unix Time Works

A Unix timestamp is the number of seconds since 00:00:00 UTC on January 1, 1970 (the "epoch"), not counting leap seconds. JavaScript and many APIs use milliseconds instead, which have three more digits.

Date = 1970-01-01 00:00 UTC + timestamp seconds   Timestamp = (date − epoch) in seconds

Worked Example

Tips

Signed 32-bit timestamps run out at 2,147,483,647, which is 03:14:07 UTC on January 19, 2038 (the "Year 2038 problem"). Your time zone line uses your browser’s settings.