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How accurate is my watch?


Author's Note

As someone who's old enough to remember cheap wristwatches that gradually slowed if you forgot to hand-wind them often enough, I was surprised to learn that today's cheap battery-powered quartz watches are accurate to within less than a second per day. Given how reliable they are, it's all the more amazing that any of us are late for anything.

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Sources

  • Chronocentric.com. "Accuracy of Fine Wristwatches." (March 8, 2012) http://www.chronocentric.com/watches/accuracy.shtml
  • IEEE Global History Network. "Milestones:Pioneering Work on the Quartz Electronic Wristwatch, 1962-1967." (March 8, 2012) http://www.ieeeghn.org/wiki/index.php/Milestones:Pioneering_Work_on_the_Quartz_Electronic_Wristwatch,_1962-1967
  • Leinhard, John H. "No. 1506: The First Mechanical Clocks." Engines of Our Ingenuity. (March 8, 2012) http://www.uh.edu/engines/epi1506.htm
  • Lombardi, Michael. "The Accuracy and Stability of Quartz Watches." Horological Journal. February 2008. (March 8, 2012) http://tf.nist.gov/general/pdf/2276.pdf
  • Mansfield, Howard. "Does Anybody Really Know What Time It Is?" The New York Times. March 10, 2011. (March 8, 2012) http://www.nytimes.com/2011/03/11/opinion/11mansfield.html
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