Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates (strtotime style).
About the Unix Timestamp Converter
Unix timestamps — seconds since January 1, 1970 UTC — are how computers store time, but they are unreadable to humans. The AlarmDaddy Unix Timestamp Converter goes both ways: turn a date or time string into a timestamp (like PHP's strtotime), or turn a timestamp into a readable date in your local time, UTC, and ISO 8601.
Enter a date string to get its Unix timestamp in seconds and milliseconds, or paste a timestamp to see the corresponding date in multiple formats. A one-click "Now" button drops in the current timestamp. Developers reach for this constantly when reading logs, debugging APIs, and working with databases that store epoch time.
How to use this calculator
- 1Choose Date → Timestamp or Timestamp → Date.
- 2Enter a date string, or a Unix timestamp (or click Now).
- 3Read the timestamp in seconds and milliseconds, or the date in local, UTC and ISO formats.
The formula
A Unix timestamp counts the seconds elapsed since the Unix epoch (midnight UTC on 1 January 1970). Converting a date to a timestamp parses it to that second count; converting back constructs a date from the seconds, displayed in local, UTC and ISO formats.