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An 18 year old+ would be:

  • 18 years x 12 months per year = 216 months old
  • 216 months x 30.42 days per month* = 6570.72 days old
  • 6570.72 days x 24 hours per day = 157687.28 hours old
  • 157687.28 hours x 60 minutes per hour = 9461836.8 minutes old
  • 9461836.8 minutes x 60 seconds per minute = 567710208 seconds old

* Since there is 4 months that contain 30 days; 1 month that contains 28 or 29 days; and 7 months that contain 31 day the average of days in a month is 30.416666666667

+ 18 years from their day of birth until the day they turned 18.

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13y ago

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