It's about ten times as big as a Concrete Mixer Truck.
In other words, the size of a Concrete Mixer Truck is 0.1 times 931 barrels.(a.k.a. cement mixer, a.k.a. cement mixer truck, a.k.a. cement transport truck, a.k.a. concrete mixer, a.k.a. concrete transport truck, a.k.a. in-transit mixer)(standard size; drum capacity)
A concrete mixer truck has a drum volume of up to 95 barrels. Concrete mixer trucks can be in transit for about 90 minutes before the concrete dries — if the concrete dries while in the drum, jackhammers or even dynamite must be used to remove it.
It's about one-twentieth as big as a Hot Air Balloon.
In other words, the size of a Hot Air Balloon is 20 times 931 barrels.(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 19,000 barrels. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
It's about one-twenty-fifth as big as an Olympic Swimming Pool.
In other words, the size of an Olympic Swimming Pool is 23 times 931 barrels.(FINA regulation; (minimum capacity)
According to the Fédération Internationale de Natation (FINA), a swimming pool for Olympic and world championship events must measure 50 m by 25 m with a depth of at least 2 m for a total volume of 22,000 barrels. A pool of this size was to be used in Olympic time trials in New Jersey in early 2008, but its component pieces were stolen from a warehouse, likely to be sold for scrap metal.
It's about one-fifty-fifth as big as The Goodyear Blimp.
In other words, the size of The Goodyear Blimp is 53.2 times 931 barrels.(for GZ-20A) The Goodyear GZ-20 model Blimp measures 49,600 barrels in total volume. A December, 1929 college football game between the University of Florida Gators and the University of Oregon Webfoots (later the University of Oregon Ducks) began with the blimp dropping a parachute-equipped ball from a height of 61 m (200 ft) to the field below.
It's about 150 times as big as a Hot Tub.
In other words, the size of a Hot Tub is 0.00667 times 931 barrels.(for Lifesmart Rock Solid Simplicity Plug and Play 4 Person Spa With 12 Jets) (a.k.a. Spa, a.k.a. Jacuzzi, a.k.a. Whirlpool) (Advertised Capacity)
An average, four-person hot tub holds 6.22 barrels of water. Modern hot tubs became popular outside of Japan starting in about 1940.
It's about one-two-hundred-fiftieth as big as The Lincoln Memorial Reflecting Pool.
In other words, 931 barrels is 0.00421 times the size of The Lincoln Memorial Reflecting Pool, and the size of The Lincoln Memorial Reflecting Pool is 238 times that amount.(Washington, D.C.)
The Lincoln Memorial Reflecting Pool holds approximately 221,000 barrels of water. The Pool has a sloping bottom and extends to 80 cm (30 in) deep in its center.
It's about one-three-hundred-fiftieth as big as The Capitol Rotunda (US).
In other words, the size of The Capitol Rotunda (US) is 340 times 931 barrels.(formally United States Capitol rotunda) (Washington, D. C.) (total chamber volume)
The Capitol rotunda measures 320,000 barrels in total volume. Beneath the Capitol lies a crypt that was built to hold the remains of President George Washington, but according to his wishes, Washington was entered at his family home and the crypt remains empty.