Unix Timestamp Converter

What is a Unix Timestamp?

The Unix timestamp (also known as Epoch time, POSIX time, or Unix time) is a system for describing a point in time. It is defined as the number of seconds that have elapsed since the Unix Epoch: January 1, 1970, at 00:00:00 UTC, minus leap seconds.

For systems that require sub-second precision, timestamps are often stored in milliseconds (1/1000th of a second).

How to Identify Seconds vs Milliseconds

• Seconds (10 digits): Standard Unix timestamps in seconds are currently 10 digits long (e.g., 1781234567). They will reach 11 digits in the year 2286.
• Milliseconds (13 digits): Timestamps in milliseconds are 13 digits long (e.g., 1781234567000).

How to Use this Converter

1. Live Epoch Clock: The top section shows the current Unix timestamp ticking in real time. You can pause it, copy the value in seconds or milliseconds, or reset it.
2. Convert Timestamp to Date: Enter any Unix timestamp in seconds or milliseconds. The tool automatically detects the scale, parses it, and displays:
   • UTC time string
   • Your local browser time string
   • ISO 8601 representation
   • Relative time (e.g. “3 hours ago” or “in 2 days”)
   • Year/Date breakdowns (leap year status, day of the week, week of the year).
3. Convert Date to Timestamp: Input a year, month, day, hour, minute, and second in either your Local timezone or UTC, and instantly get the seconds and milliseconds Unix equivalents.
4. Common Epoch Reference Table: Quick formulas and lookup values for common durations in seconds (minute, hour, day, week, month, year) are listed at the bottom for developer convenience.