What is a Unix timestamp?

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC. It's a universal way to represent a point in time as a single number, independent of time zones. For example, timestamp 1700000000 represents November 14, 2023 at 22:13:20 UTC.

How do I convert a Unix timestamp to a date?

Paste your Unix timestamp into our converter and it instantly shows the corresponding date and time in both UTC and your local timezone. It auto-detects whether your timestamp is in seconds (10 digits) or milliseconds (13 digits). You can also see the ISO 8601, RFC 2822, and human-readable formats.

What is the difference between seconds and milliseconds timestamps?

Unix timestamps in seconds are 10 digits long (e.g., 1700000000) and are used by most backend systems, databases, and command-line tools. Millisecond timestamps are 13 digits (e.g., 1700000000000) and are used by JavaScript (Date.now()), Java (System.currentTimeMillis()), and some APIs. Our converter handles both automatically.

How do I get the current Unix timestamp?

Our tool displays the current Unix timestamp in real-time with a live-updating clock. You can also get it programmatically: in JavaScript use Date.now() (milliseconds) or Math.floor(Date.now()/1000) (seconds), in Python use time.time(), in Bash use 'date +%s'.

What is the Year 2038 problem?

The Year 2038 problem occurs because 32-bit signed integers can only store values up to 2,147,483,647, which corresponds to January 19, 2038 at 03:14:07 UTC. After this moment, 32-bit systems will overflow and wrap to negative numbers (representing 1901). Most modern systems use 64-bit integers, which won't overflow for billions of years.

How do I convert a date to a Unix timestamp?

Use our date-to-timestamp converter: select a date, time, and timezone, and get the corresponding Unix timestamp in both seconds and milliseconds. You can also type a date string and it will be parsed automatically.

Unix Timestamp Converter

Our Unix timestamp converter translates epoch timestamps to human-readable dates and vice versa in real-time. See the current Unix timestamp with a live clock, convert any timestamp to a formatted date, or pick a date to get its Unix timestamp. Supports seconds (10 digits) and milliseconds (13 digits), UTC and local timezone display, and multiple date formats (ISO 8601, RFC 2822, human-readable). All processing happens in your browser.

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Timestamp Analysis:

Format: Unix epoch (seconds since 1970)
Tip: Store in UTC, display in local time

lightbulb Tips

•10 digits = seconds, 13 digits = milliseconds
•Epoch = Jan 1, 1970 00:00:00 UTC
•Always store timestamps in UTC
•Y2038 problem: 32-bit overflow Jan 19, 2038

How to Use This Calculator

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View Current Time

See the current Unix timestamp with a live-updating clock.

event

Timestamp → Date

Paste a Unix timestamp to see the corresponding date and time.

Date → Timestamp

Pick a date and time to get its Unix timestamp.

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Copy Result

Copy any format (seconds, milliseconds, ISO, RFC) with one click.

The Formula

Unix time (also called epoch time or POSIX time) counts the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC. This date is called the Unix epoch. Timestamps can be in seconds (10 digits) or milliseconds (13 digits). Negative timestamps represent dates before 1970.

Unix Timestamp = seconds elapsed since January 1, 1970 00:00:00 UTC (epoch)

lightbulb Variables Explained

Epoch January 1, 1970 00:00:00 UTC — the Unix time origin
Seconds (s) 10-digit timestamp (e.g., 1700000000)
Milliseconds (ms) 13-digit timestamp (e.g., 1700000000000)
UTC Coordinated Universal Time — the reference timezone

tips_and_updates Pro Tips

10-digit timestamps are in seconds, 13-digit are in milliseconds — our tool auto-detects

The Unix epoch is January 1, 1970 00:00:00 UTC — timestamp 0

JavaScript Date.now() returns milliseconds, Python time.time() returns seconds

The Year 2038 problem: 32-bit signed integers overflow on Jan 19, 2038 at 03:14:07 UTC

Negative timestamps represent dates before 1970 (e.g., -86400 = Dec 31, 1969)

Always store timestamps in UTC and convert to local time for display

ISO 8601 format (2024-01-15T10:30:00Z) is the international standard for date exchange

Convert Unix Timestamps & Epoch Time Online

Our free Unix timestamp converter translates epoch time to human-readable dates and dates to Unix timestamps instantly. Live clock display, supports seconds and milliseconds, UTC and local time. Essential developer tool.

Unix Timestamp to Date Converter

Convert any Unix timestamp to a human-readable date and time. Our converter auto-detects seconds (10 digits) and milliseconds (13 digits), shows UTC and local time, and displays multiple formats including ISO 8601 and RFC 2822.

Date to Unix Timestamp Converter

Convert any date and time to its Unix timestamp. Select a date, choose your timezone, and get the epoch time in both seconds and milliseconds. Perfect for API development, database queries, and debugging time-related issues.

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