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

  • 2019-02-13 19:58:00 KST -0.599395
  • 2019-02-12 08:48:41 KST -0.436693
  • 2019-02-11 08:57:32 KST -0.426634
  • 2019-01-22 23:58:45 KST -0.302692
  • 2019-01-21 19:38:21 KST -0.278640
  • 2019-01-17 23:48:25 KST -0.924876
  • 2019-01-15 23:59:10 KST -0.840100
  • 2019-01-14 19:29:39 KST -1.157226
  • 2019-01-07 20:57:55 KST -0.357900
  • 2018-11-16 00:26:22 KST -0.536920
  • Average -0.5861076

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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.