CalKit

Unix Timestamp Converter

Convert between Unix timestamps and dates/times.

현재 Unix 타임스탬프
실시간
1,770,656,769

타임스탬프 → 날짜

한국 시간2026. 2. 10. 오전 2:06:09
ISO 86012026-02-09T17:06:09.000Z
UTCMon, 09 Feb 2026 17:06:09 GMT

날짜 → 타임스탬프

Overview

Convert between Unix timestamps (Epoch Time) and human-readable date/time formats. Useful for server log analysis, API debugging, and database operations.

Formula

A Unix timestamp is the number of seconds elapsed since January 1, 1970 00:00:00 UTC (Epoch). Date to timestamp: Calculate (target UTC date/time − 1970-01-01T00:00:00Z) in seconds. Millisecond timestamp = seconds × 1000. Timestamp to date: Add the seconds to the Epoch and decompose into year/month/day/hour/minute/second.

How to Use

  1. 1Enter a Unix timestamp or a date/time value.
  2. 2Select the conversion direction (timestamp → date or date → timestamp).
  3. 3Choose the timezone (default: local timezone).
  4. 4The conversion result is displayed instantly.

Tips

  • ✔Use the 'now' button to quickly check the current timestamp.
  • ✔Distinguish between millisecond timestamps (13 digits) and second timestamps (10 digits).
  • ✔Year 2038 problem: On 32-bit systems, Unix timestamps can only represent dates up to 2038-01-19 03:14:07 UTC.
  • ✔JavaScript's Date.now() returns milliseconds, while Python's time.time() returns seconds with decimals.

FAQ

Q. What is a Unix timestamp?

A Unix timestamp (also known as Epoch Time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is a timezone-independent, absolute time representation supported by virtually all programming languages and operating systems.

Q. What is the difference between millisecond and second timestamps?

A second timestamp is a 10-digit number (e.g., 1700000000), while a millisecond timestamp is a 13-digit number (e.g., 1700000000000). JavaScript uses milliseconds, while Unix/Linux system commands typically use seconds.

Q. What is the Year 2038 problem?

Unix timestamps stored as 32-bit signed integers can only represent values up to 2,147,483,647 (2038-01-19 03:14:07 UTC). After that, an overflow occurs. Most modern systems use 64-bit integers to avoid this issue.

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