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Is 31,000,000 grains as heavy as a Gold Bar?

It's about 150 times as heavy as a Gold Bar
The weight of a Gold Bar is about 192,000 grains.
(London Good Delivery bar)
A "London Good Delivery" gold bar — the variety commonly held by Central Banks — should weigh 192,000 grains. The largest gold bar ever produced was minted by Mitsubishi Materials Corporation (a sibling company of the auto manufacturer) in 2005 and weighed 3,858,089.5880 grains.
There's more! See other comparisons to 31,000,000 grains...