Unix time is how computers, databases, logs and APIs store moments in time. It counts seconds since the “epoch” at midnight UTC on 1 January 1970 and is the same everywhere on Earth, regardless of time zone.
How to use the Unix Timestamp Converter
- Convert
- Date and time
- Unix timestamp
- Time zone
Everything runs in your browser, so results appear instantly and nothing you type is sent to a server.
How it works
Dates are converted using your browser’s time-zone database, which handles daylight saving time. Timestamps with 13 or more digits are treated as milliseconds.
Formula
timestamp = seconds elapsed since 1970-01-01 00:00:00 UTC (leap seconds ignored)Worked example
Inputs — Convert: Timestamp → date & time; Unix timestamp: 1767225600; Time zone: UTC / GMT / Zulu.
Results — Unix time (seconds) = 1767225600; Milliseconds = 1767225600000; ISO 8601 (UTC) = 2026-01-01T00:00:00.000Z; In the chosen time zone = Thu, 1 Jan 2026, 00:00:00 (UTC+00:00); Relative to now = 297 days ago.
Key terms
- Epoch
- 00:00:00 UTC on 1 January 1970, time zero for Unix time.
- ISO 8601
- International date format, e.g. 2026-01-01T00:00:00Z.
Frequently asked questions
What is the 2038 problem?
32-bit signed timestamps overflow at 03:14:07 UTC on 19 January 2038.
Does Unix time include leap seconds?
No, every day is treated as exactly 86,400 seconds.
Seconds or milliseconds?
JavaScript and many APIs use milliseconds (13 digits); Unix tools use seconds (10 digits).
What formula does the Unix Timestamp Converter use?
timestamp = seconds elapsed since 1970-01-01 00:00:00 UTC (leap seconds ignored).