Unix Timestamp Converter
Convert a Unix timestamp to a date
Enter a Unix timestamp in seconds or milliseconds and the calculator gives the UTC date and time, the local time and the ISO 8601 form. Right now the timestamp is 1,791,186,655 (2026-10-05 07:50:55 UTC).
What a timestamp is
A Unix timestamp counts seconds since 00:00:00 UTC on January 1, 1970, ignoring leap seconds. JavaScript and many APIs use milliseconds instead, giving 13 digits.
The 2038 problem
A signed 32-bit timestamp overflows at 2,147,483,647, which is 03:14:07 UTC on January 19, 2038. Modern 64-bit systems are not affected.
Frequently asked questions
What is a Unix timestamp?
Seconds since January 1, 1970 UTC.
What is the timestamp now?
1,791,186,655.
Is it in seconds or milliseconds?
This tool treats 12 or more digits as milliseconds.
What is timestamp 0?
January 1, 1970, 00:00:00 UTC.
What is 1700000000?
November 14, 2023, 22:13:20 UTC.
What is 2147483647?
January 19, 2038, 03:14:07 UTC.
Are leap seconds included?
No.
What is the year 2038 problem?
A 32-bit overflow.