NKO Atomic Clock

Current time in milliseconds unit, dday remaining time calculator, elapsed time, stopwatch, server time checker

☞ Install NKO Atomic Clock(Android app) at Google Playstore
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http://for-s.seoultech.ac.kr/html/main.html server time check history

  • 2020-05-07 13:49:48 KST -0.942340
  • 2020-03-27 03:10:20 KST -0.645003
  • 2020-03-03 19:58:07 KST -0.920650
  • 2020-02-21 23:55:11 KST -0.810523
  • 2020-02-21 19:52:47 KST -0.741139
  • 2020-02-21 12:54:27 KST -0.997539
  • 2020-02-20 19:41:28 KST -0.731791
  • 2020-02-20 13:40:47 KST -0.861897
  • 2020-01-17 23:59:45 KST -1.062637
  • 2019-11-29 19:51:48 KST -0.545335
  • Average -0.8258854

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We fetch a server clock and let you see

Webservers transmit their time in seconds unit, so without special treatment, the maximum error would be as big as 1 second. NKO Atomic Clock calculates a server time more than ten times in 1 second and seize the moment when the second changes. Thus we can minimize the calculation error as small as 0.1 second. Moreover, delays between our server and a destination server are considered so the accuracy of time increases.

NKO supports the HTTPS protocol and subdomains

Some servers use different servers over protocols or subdomains. You can get a desired result by specifying more details.


# You need to tell us an exact server address. For example, some sites host differently by whether the address begin with WWW or not.

# Even if your computer clock isn't synchronized, NKO always will display correct time.

# If you click a numeric time error in the history view, the clock will use that measurement.

# The results can have quite much error if the destination server is under load balancing. Please refer to a variance in the server time history information.

# A particular service uses its own time clock, different with web servers' clock. in this case, server time guessing is not meaningful.