Unix milliseconds to date converter
Paste a Date.now() or System.currentTimeMillis() value to see the date and time down to the millisecond.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter unix timestamp (milliseconds) and time zone (optional).
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
Seconds = floor(milliseconds / 1000) and the remainder is the fraction. Date = 1970-01-01 00:00:00 UTC + seconds.
Example
Inputs: Unix timestamp (milliseconds) = 1,700,000,000,123, Time zone (optional) = Cairo (Egypt). Result: Date and time (UTC): 2023-11-14 22:13:20.123; Weekday: Tuesday.
Limits and caveats
- A 10-digit value is usually seconds, so use the Unix seconds converter for it.
- It does not show anything finer than a millisecond.
Questions about this tool
How do I know a timestamp is in milliseconds?
Current millisecond timestamps have 13 digits, while second timestamps have 10.
Who uses milliseconds?
JavaScript Date.now(), Java and many APIs and databases such as MongoDB.
How do I turn it into seconds?
Divide by 1000. For example 1700000000123 is 1700000000.123 seconds.