Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates

Unix Timestamp Converter

Conversion Mode*

Choose whether to convert a timestamp to a date, or a date to a timestamp

Unix Timestamp

Enter a Unix timestamp in seconds (or milliseconds — auto-detected)

Date

Select a date to convert to a Unix timestamp

Time (HH:MM)

Enter time in HH:MM format (24-hour)

How to Use

Select your conversion mode: 'Timestamp → Date' to convert a Unix timestamp to a readable date, or 'Date → Timestamp' to convert a date and time to a Unix timestamp. Enter your value and click Calculate to see the results in multiple formats including UTC, ISO 8601, and relative time.

Formula

\text{Unix Timestamp} = \text{Seconds since Jan 1, 1970 00:00:00 UTC}

Examples

The Unix Epoch

Timestamp 0 = January 1, 1970, 00:00:00 UTC — the start of Unix time.

November 14, 2023

Timestamp 1700000000 = Tue, 14 Nov 2023 22:13:20 UTC.

Y2K — January 1, 2000

The start of the year 2000 is Unix timestamp 946684800.

Frequently Asked Questions

What is a Unix timestamp?▾

A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since January 1, 1970, 00:00:00 UTC. It's widely used in programming and databases.

What's the difference between seconds and milliseconds?▾

Unix timestamps in seconds are typically 10 digits (e.g., 1700000000). Millisecond timestamps are 13 digits (e.g., 1700000000000). The converter auto-detects which format you're using.

What is the Year 2038 problem?▾

32-bit systems store Unix timestamps as a signed 32-bit integer, which overflows on January 19, 2038 at 03:14:07 UTC. Most modern systems use 64-bit integers, which won't overflow for billions of years.

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates