Date to Unix Timestamp Converter

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Convert Date to Unix Time

Select a date and time below. The calculator converts your browser's local date and time into a Unix timestamp.

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Unix Timestamp Result

Select a date and time, then click Convert to Unix Timestamp to view the complete conversion.

Unix Timestamp 0 seconds

Unix Timestamp — Seconds

Unix Timestamp — Milliseconds

Local Date & Time

UTC Date & Time

ISO 8601

Browser Time Zone

Current Unix Timestamp

Live Unix timestamp in seconds.

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What Is a Date to Unix Timestamp Converter?

A Date to Unix Timestamp Converter changes a human-readable calendar date and time into Unix epoch time. Unix time is commonly represented as the number of elapsed seconds since the Unix epoch.

This format is widely used by websites, APIs, databases, servers, applications, and programming languages because timestamps make dates easier for software to store, compare, and process.

Unix Epoch Starting Point:

January 1, 1970 at 00:00:00 UTC corresponds to Unix timestamp 0.

How to Convert a Date to Unix Timestamp

Select a Date

Choose the calendar date that you want to convert into Unix epoch time.

Enter the Time

Select the exact hour, minute, and second for your chosen date.

Get Unix Time

Click the conversion button to get Unix seconds, milliseconds, UTC, and ISO format.

Date to Unix Timestamp Conversion Results

The converter provides several formats so that you can use the result in websites, applications, APIs, databases, and other software projects.

Unix Seconds

The elapsed whole seconds relative to the Unix epoch.

Unix Milliseconds

The same instant represented with millisecond precision.

ISO 8601

A standardized machine-readable representation of the selected date and time.

Unix Timestamp Seconds vs Milliseconds

Unix timestamps are often stored in seconds, while many programming environments and web applications also use milliseconds.

Format	Description	Common Size
Unix Seconds	Elapsed seconds since the Unix epoch	Typically 10 digits for present-era dates
Unix Milliseconds	Elapsed milliseconds since the Unix epoch	Typically 13 digits for present-era dates

Simple Conversion:

Unix Milliseconds = Unix Seconds × 1,000

Unix Seconds = Unix Milliseconds ÷ 1,000

How Time Zones Affect Date to Unix Timestamp Conversion

A calendar date and clock time need a time-zone context to identify a unique instant. This calculator treats the date and time you enter as local time in your browser's configured time zone.

It then converts that instant into Unix epoch time and also shows the corresponding UTC value. This is why two people entering the same clock time in different time zones can get different Unix timestamps.

What Is UTC?

UTC is a global time standard commonly used by servers, databases, APIs, and software systems. Unix timestamps provide a convenient way to represent an instant consistently while the displayed local time can vary by time zone.

Common Uses for Date to Unix Timestamp Conversion

Creating API request timestamps.
Setting expiration dates and times.
Storing dates in databases.
Scheduling application events.
Comparing two points in time programmatically.
Working with JavaScript and server-side applications.
Creating log and analytics timestamps.
Converting local dates to standardized time values.
Testing date-based software features.

Frequently Asked Questions

What is a Unix timestamp?

A Unix timestamp represents elapsed time relative to the Unix epoch, which begins at January 1, 1970, 00:00:00 UTC.

How do I convert a date to Unix time?

Select your date and time, then click Convert to Unix Timestamp. The calculator will display the corresponding Unix seconds and milliseconds.

Does the converter support milliseconds?

Yes. Every conversion displays both Unix seconds and Unix milliseconds.

Does a Unix timestamp include a time zone?

A Unix timestamp identifies an instant in time. Time zones are used when converting between that instant and a displayed local calendar date and clock time.

What time zone does this calculator use for my input?

The date and time you enter are interpreted using your browser's configured local time zone. The results also show the corresponding UTC date and time.

What is the difference between Unix seconds and milliseconds?

Unix seconds count seconds from the epoch, while Unix milliseconds use one-thousandth-of-a-second units. A millisecond timestamp is therefore 1,000 times the equivalent seconds value.

What is ISO 8601?

ISO 8601 is a standardized date and time representation widely used in software, APIs, databases, and data exchange.

Can I convert the current date and time?

Yes. Click Use Current Date & Time and the calculator will fill in your browser's current local date and time automatically.