Unix Timestamp Converter
Paste a Unix timestamp to see the date it represents, or enter a date and time to get its timestamp. Seconds and milliseconds are detected automatically.
Result
- ISO 8601
- 2023-11-14T22:13:20.000Z
- Unix timestamp (seconds)
- 1700000000
- Unix timestamp (milliseconds)
- 1700000000000
- Input read as
- seconds
Formula
- Unix time = seconds elapsed since 1970-01-01 00:00:00 UTC
- Milliseconds = seconds × 1,000
- Days since the epoch = seconds ÷ 86,400
How the Unix Timestamp Converter works
Unix time counts the seconds since midnight UTC on January 1, 1970, known as the epoch. It ignores leap seconds, so every day is exactly 86,400 seconds long. Because it is a single number with no time zone, it is the usual way computers store moments in time.
Many systems, including JavaScript, store milliseconds instead of seconds. A current timestamp in seconds has 10 digits and one in milliseconds has 13, which is how the converter tells them apart.
Worked example
The timestamp 1700000000 is Tuesday, November 14, 2023 at 22:13:20 UTC. In milliseconds it is 1700000000000.
Frequently asked questions
What is the Unix epoch?
It is 00:00:00 UTC on January 1, 1970, the zero point of Unix time. Negative timestamps represent moments before it.
What is the year 2038 problem?
Systems that store Unix time as a signed 32-bit number overflow at 03:14:07 UTC on January 19, 2038, when the count reaches 2,147,483,647. Modern systems use 64-bit numbers and are not affected.
Does a Unix timestamp have a time zone?
No. It is the same number everywhere on Earth at a given instant. A time zone is applied only when it is shown as a date.
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