ClockWatch software syncs computer to the Atomic Clock Overview
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System Requirements
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ClockWatch Version 4.5 released!

  Did you know...
  • Most internal PC clocks gain or lose from 15 to 120 seconds each day
  • The U.S. National atomic clock can be accessed over the Internet
  • ClockWatch will synchronize your PC clock to the National Institute of Standards and Technology's atomic clock so you'll never have to set your PC's clock again
  • You can get ClockWatch for both single users and large networks


Due to deficiencies in the original PC design, clocks in computers are notoriously inaccurate. They can drift from several seconds to several minutes each day, which can be anything from a minor annoyance to a major issue.

ClockWatch keeps time in your computer accurate by regularly comparing your system clock to the atomic clock at NIST, accessible over the Internet, which keeps your computer's clock within +/- 1 second of Coordinated Universal Time (UTC).


ClockWatch offers you a variety of options for updating your computer's clock and managing the information, ranging from a simple, hands-off approach to a closely-managed process. ClockWatch will:

  • Make your computer clock a precision time keeper—synchronizes your clock with the U.S. cesium atomic clock, the world's most accurate clock
  • Keep time accurate automatically—just set it once and ClockWatch does the rest
  • Ensure that your system clock doesn't drift over time, and provide a graphic display of your clock's performance
  • Provide options to set your clock manually or automatically
  • Synchronize your clock using the Internet or direct modem dial-up
  • Run as a regular Windows application, from a system tray, from a command line, or as a Windows service
  • Give you access to online documentation and free customer support from Beagle Software

Read more about ClockWatch features and benefits or compare editions.

"Our favorite time utility"

4 stars

5 cows


How to Order

Download a free evaluation copy from our download site.

System Requirements

For complete information, see ClockWatch Specifications.

For more information

Free 30-day Trial
Software Updates
Product Information
   Detailed Product Guide
   Client/Server Description
   User Manual
   Frequently Asked Questions about ClockWatch
   User and Editorial Comments

Clock and Timekeeping Information
   OATS Compliance Information
   More About Computer Clocks
   More About Time and Time Standards
   History of Timekeeping

ClockWatch Product Index


For more information on ClockWatch, please complete the information request form.  Or call us toll-free at 877-845-2549.

(1 612 370 1091 from outside U.S./Canada).

ClockWatch is a registered trademark of Beagle Software, Inc.