3 ms·

And my favorite, π seconds is a nanocentury.

• thaumasiotes 9y ago
  How so? I had assumed there would be an error in there about forgetting that years don't have an integral number of days, but even at exactly 36500 days per century, a nanocentury is still over 3.15 seconds.
  • tempay 9y ago
    nano century = 100 * 365.25 * 24 * 60 * 60 * 1e-9 = 3.15576 (nano century - π)/π = 0.45% So a nano century is equal to π seconds within half a percent which is more than good enough for casual uses as an approximation.
    • thaumasiotes 9y ago
      It's also equal to 3 seconds within an error of 5.2%, which is also more than good enough for casual uses. But when you're having fun with pi, you generally measure similarity in terms of being accurate to some number of decimal places, and this statistic is accurate to an unimpressive one place (3.1).
• paulsutter 9y ago
  Well one second is a microfortnight