Question 1

What is Unix time?

Accepted Answer

Unix time (also called Unix epoch time) is the number of seconds elapsed since January 1, 1970 00:00:00 UTC. It's the standard way computers represent dates.

Question 2

What is the difference between seconds and milliseconds?

Accepted Answer

Unix timestamps can be in seconds (10 digits, e.g. 1700000000) or milliseconds (13 digits, e.g. 1700000000000). This tool auto-detects which format you're using.

Question 3

What is the Unix epoch?

Accepted Answer

The Unix epoch is January 1, 1970 00:00:00 UTC — the starting point for Unix time. All timestamps count upward from this moment.

Question 4

Why use Unix timestamps?

Accepted Answer

They're timezone-independent, easy to compare, and supported by virtually all programming languages and databases.

Question 5

How do I convert online free?

Accepted Answer

Pick the from and to units above and the result appears instantly. Free, no sign-up, works on mobile.

Question 6

Which units are supported?

Accepted Answer

All common units are supported. Choose from the dropdowns above for an instant free conversion.