What is a Unix timestamp?

The number of seconds that have elapsed since midnight UTC on January 1, 1970 (the "Unix epoch") — a common way for computers to represent a point in time.

Why do some systems use milliseconds instead of seconds?

Some languages and APIs (like JavaScript's Date.now()) use milliseconds for finer precision — divide by 1000 to get the standard Unix timestamp in seconds.

Unix Timestamp Converter

Convert between Unix time (seconds since 1970) and a readable date.

Unix timestamp (seconds)

Tue, 06 Oct 2026 18:55:02 GMT

Processing happens locally in your browser. Nothing you enter is uploaded.

How It Works

Choose a direction, then enter a timestamp or pick a date and time.

Example

Unix timestamp 0 is January 1, 1970, 00:00:00 UTC.

Frequently Asked Questions

What is a Unix timestamp?: The number of seconds that have elapsed since midnight UTC on January 1, 1970 (the "Unix epoch") — a common way for computers to represent a point in time.
Why do some systems use milliseconds instead of seconds?: Some languages and APIs (like JavaScript's Date.now()) use milliseconds for finer precision — divide by 1000 to get the standard Unix timestamp in seconds.

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