How do I convert milliseconds to seconds in Unix time?

Unix time is traditionally represented in seconds. To convert millisecond timestamps (common in JavaScript, e.g. Date.now()), divide the value by 1000.

Are my timestamp dates uploaded to a server?

No, all timestamp calculations, relative time statements, and timezone conversions run locally in your web browser. No data is sent to our servers.

Unix Timestamp Converter

Q: What is a Unix timestamp?

A Unix timestamp (also known as Epoch time) is the total number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC, excluding leap seconds. It is widely used in operating systems and file formats.

Convert seconds or milliseconds to standard human dates, and parse date strings back to epoch timestamps.

Epoch to Human Date

Enter Unix Timestamp

Timestamp Unit

Local Time

GMT / UTC Time

Relative Time

Human Date to Epoch

Enter Date String

Epoch (Seconds)

Epoch (Milliseconds)

Parsed ISO 8601

Frequently Asked Questions

What is a Unix timestamp?

Unix time (or epoch time) is a system for describing points in time, defined as the number of seconds that have elapsed since Thursday, January 1, 1970 (UTC).

Why does milliseconds matter?

Many programming languages (like JavaScript or Java) calculate times in milliseconds instead of seconds. Millisecond timestamps are 13 digits long, whereas standard seconds timestamps are 10 digits.

How are timezones resolved?

The 'Local Time' result is parsed using your web browser's local timezone configuration, while the UTC output converts it to Greenwich Mean Time.

Are my inputs kept private?

Yes, 100%. All timestamp parses and date calculations are executed in your browser using local Javascript. No data is sent to our servers.