Christianity Stack Exchange is a question and answer site for committed Christians, experts in Christianity and those interested in learning more. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Original: Genesis 6:15, 'the length of the ark shall be three hundred cubits, the breadth of it fifty cubits':

According to King James Bible, Genesis 6:15, when the Lord told Noah to make an ark of gopher wood, He specified that

'the length of the ark shall be three hundred cubits, the breadth of it fifty cubits'.

Romans, Egyptians, Sumerians, and Persians at least all have different measurements for a "cubit." Is there an explanation regarding how Noah known what God was talking about?

share|improve this question

closed as off-topic by David, fredsbend, Dan, Narnian, James T Oct 5 '13 at 21:50

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "General philosophical or sociological questions are off-topic unless clearly asking for a doctrinal answer. See: On-topic and constructive examples." – David, fredsbend, Narnian
If this question can be reworded to fit the rules in the help center, please edit the question.

Probably because those groups did not exist until after the flood. Noah predates those societies. – Narnian Oct 2 '13 at 17:45
Consider migrating this to BH.SE – Dan Oct 3 '13 at 16:12
@Flimzy - good edits. – David Nov 12 '13 at 0:25
up vote 8 down vote accepted

A cubit is a general form of measure - it is approximately the length of your arm, from the elbow to your finger. As such, a cubit isn't specific to a culture, it is specific to a man. On average, 18 inches is a good approximation, but that can differ from person to person - for some people it might be 15" for others, 21". The various cubits that you see reflect later legislative (and historians') attempts to "standardize" the measure. The exactitude you look for in modern groups didn't exist then.

As Robert Creese points out in his wonderful book World in the Balance: The Historic Quest for an Absolute System of Measurement, human based measures were never intended to match the precision we look for today. Cecil Adams points out that the 'mile' has varied in length over time as well. "18 inches" is specific. Cubits are not that specific.

As such, there are two good options to answer your question:

  1. God was saying to Noah - "Use your cubit."
  2. God didn't care about the exact dimensions to the precision you are looking for.

And of course Narnian is right on when he points out that Persia, Rome, Sumer, and Egypt were hundreds of years after Noah.

Incidentally, Creese specifically mentions that there are even different kinds of cubits - sacred cubits were 25 inches!

Indeed, Taylor said, the pyramid had been built to provide “the measure of the Earth” for humans. Furthermore, the unit used to measure the stones was the “sacred cubit” (about 25 inches) that had been used by God’s chosen people throughout the ancient world in their holy construction projects—Noah in his ark, Abraham in the tabernacle, and Solomon in the temple.7

Crease, Robert P. (2011-10-17). World in the Balance: The Historic Quest for an Absolute System of Measurement (Kindle Locations 2295-2298). Norton. Kindle Edition.

share|improve this answer
Even a lot of modern measurements are standardized versions of these ad-hoc measures. 18 inches is 1.5 feet, and a foot was originally a foot. And as anyone who has ever been to a shoe store can tell you, that's a pretty arbitrary unit of size. Likewise, an acre was originally "the amount of land that can be plowed by a single yoke of oxen in one day." – Mason Wheeler Oct 2 '13 at 18:03
1… I was always fascinated by the mile. Even got a question published once too! – Affable Geek Oct 2 '13 at 18:07

Not the answer you're looking for? Browse other questions tagged or ask your own question.