What is Unix timestamp?

Unix timestamp is the number of seconds elapsed since January 1, 1970 00:00:00 UTC (the Unix Epoch). Used universally in programming and APIs.

What is the Y2K38 problem?

32-bit Unix timestamps will overflow on January 19, 2038 at 03:14:07 UTC. 64-bit systems solve this for billions of years. Modern systems use 64-bit timestamps.

How do I convert Unix timestamp to date?

Multiply Unix timestamp (seconds) by 1000 to get milliseconds, then create a Date object. Example: new Date(timestamp * 1000).

What is the difference between Unix timestamp and milliseconds?

Unix timestamp is in seconds since epoch. Milliseconds is Unix timestamp × 1000. JavaScript Date uses milliseconds, Unix uses seconds.

Can I convert any Unix timestamp?

Yes, enter any Unix timestamp (seconds since epoch) and the calculator will convert it to UTC date, local date, and ISO 8601 format.

What is the current Unix timestamp?

The current Unix timestamp is shown at the top of the calculator, updating every second. It's the number of seconds since January 1, 1970 UTC.

Unix Timestamp

Get current Unix time and convert timestamps. Essential for APIs, databases, and time-based operations.

Current Unix Time

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Convert Timestamp

Unix Timestamp (seconds)

Result

UTC: -
Local: -
ISO 8601: -

Conversion Guide

Conversion

U

Unix to Date

Date = new Date(timestamp × 1000)

Multiply seconds by 1000 to get milliseconds for Date object

E

Epoch

January 1, 1970 00:00:00 UTC

Unix epoch start date. All timestamps are relative to this date

Step-by-Step Scenario

Example Scenario

Unix Timestamp

1700000000 seconds

1

Convert to Milliseconds

1700000000 × 1000 = 1700000000000 milliseconds

Multiply seconds by 1000 to get milliseconds

2

Create Date Object

new Date(1700000000000)

November 15, 2023 UTC

Additional Examples

Epoch Start

Unix Timestamp: 0

Date

January 1, 1970 00:00:00 UTC

Future Date

Unix Timestamp: 2000000000

Date

May 18, 2033 UTC

Characteristics of Unix Timestamp

Universal Standard

Unix timestamp is the universal standard for time representation in programming. Used by APIs, databases, and systems worldwide.

Seconds Since Epoch

Unix timestamp counts seconds since January 1, 1970 00:00:00 UTC (Unix epoch). Simple and unambiguous.

Real-Time Display

Shows current Unix timestamp, updating every second. Copy to clipboard with one click for use in code.

Multiple Formats

Converts Unix timestamp to UTC date, local date, and ISO 8601 format. Essential for date handling in applications.

Important Notes

Unix timestamp is the number of seconds since January 1, 1970 00:00:00 UTC (Unix epoch). This is the universal standard.
To convert Unix timestamp to JavaScript Date: multiply by 1000 (to get milliseconds), then use new Date(timestamp * 1000).
32-bit Unix timestamps will overflow on January 19, 2038 (Y2K38 problem). Modern systems use 64-bit timestamps.
Unix timestamp is in seconds. JavaScript Date uses milliseconds. Always multiply by 1000 when converting Unix timestamp to Date.
The calculator shows current Unix timestamp updating every second. Perfect for getting current timestamp for APIs and databases.

Frequently Asked Questions

Find answers to common questions about Unix timestamp.