Date & time
Unix Timestamp
Convert timestamps and readable dates. Everything happens on this device.
Tip: press Ctrl/⌘ + Enter
Your input stays private
This tool runs entirely in your browser. DevCalc does not send or store the content you enter.
How to use Unix Timestamp
- Enter Unix seconds, Unix milliseconds, or a readable date.
- Run the conversion.
- Compare UTC, ISO 8601, seconds, and milliseconds.
Example and important notes
A 10-digit Unix value is treated as seconds; a longer numeric value is treated as milliseconds.
- Unix timestamps describe an instant independent of timezone.
- Readable input without an explicit timezone may be interpreted locally by the browser.
Frequently asked questions
Why is my date in 1970?
Milliseconds may have been supplied where seconds were expected, or vice versa.
What is ISO 8601?
A standard date-time representation; the trailing Z denotes UTC.