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

  • 2019-07-05 17:33:30 KST -0.614769
  • 2019-04-18 19:28:28 KST -1.104405
  • 2019-04-18 19:20:59 KST -1.289356
  • 2019-03-11 19:42:07 KST -0.732821
  • 2019-03-08 18:26:04 KST -0.784300
  • 2019-03-07 14:47:40 KST -0.631680
  • 2019-02-21 19:34:54 KST -1.216044
  • 2019-02-19 20:28:24 KST -0.923812
  • 2019-02-19 19:38:07 KST -0.880405
  • 2019-02-13 19:58:00 KST -0.599395
  • Average -0.8776987

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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.