How heavy is 0.31 stones?
It's about twelve times as heavy as a Billiard Ball
The weight of a Billiard Ball is about 0.025669642857143 stones.
(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 0.024553571428571 stones and 0.026785714285714 stones. According to legend, the difficulty in obtaining elephant ivory for the manufacture of billiard balls in the 19th century inspired the search for a replacement material, which led to the development of the first industrial plastic.
It's about twelve times as heavy as a Hockey Puck
The weight of a Hockey Puck is about 0.025669642857143 stones.
(Ice hockey)
A standard ice hockey puck weighs between 0.024553571428571 stones and 0.026785714285714 stones. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about thirteen-and-a-half times as heavy as a Baseball
The weight of a Baseball is about 0.022879464285714 stones.
(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 0.022321428571429 stones and 0.0234375 stones. A major league pitcher can throw a baseball at up to 150 kph (91 mph) (with a fastball pitch), with record-setting pitches as fast as 171 kph (106 mph).
It's about fourteen-and-a-half times as heavy as a Battery (D)
The weight of a Battery (D) is about 0.0213 stones.
(Alkaline)
A "D" size battery weighs 0.0213 stones. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about one-fifteenth as heavy as a Dalmatian
The weight of a Dalmatian is about 4.650 stones.
(a.k.a. Dalmatinac, a.k.a. Carriage Dog, a.k.a. Spotted Coach Dog, a.k.a. Firehouse Dog) (FCI standard; male)
The Fédération Cynologique Internationale (FCI) calls for Dalmatians to weigh between 4.650 stones. The association of the breed with fire departments (and similarly with Budweiser Beer and its team of Clydesdales) stems from their affinity for horses, having been used historically as carriage dogs capable of guiding horse-drawn fire engines to the sites of blazes.
It's about twenty times as heavy as a Deck of Cards
The weight of a Deck of Cards is about 0.015 stones.
(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52-card deck)
A deck of 52 ISO 216 B8-size playing cards weighs 0.015 stones. Utilizing nearly 3,700 decks, the record-holding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 36 stones.
It's about one-twentieth as heavy as a Toilet
The weight of a Toilet is about 6.870 stones.
(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 6.870 stones. The Indian town of Musiri in Tamil Nadu state features the world's only paying toilet, which rewards its users up to 10¢ Indian (10 paisas) per visit and uses the waste for compost and fertilizer.
It's about one-twenty-fifth as heavy as an Octopus
The weight of an Octopus is about 7.90 stones.
(for Giant Pacific Octopus, Enteroctopus) (Adult, average)
The adult North Pacific Giant Octopus usually weighs around 7.90 stones. It is the largest octopus species and is known for its considerable intelligence, including the ability to open jars, solve mazes, and mimic other octopuses.
It's about thirty times as heavy as a Battery (C)
The weight of a Battery (C) is about 0.01 stones.
(Alkaline)
A "C" size battery weighs 0.01 stones. C batteries are typically used in medium-drain devices such as musical instruments.
It's about thirty times as heavy as a Tennis Ball
The weight of a Tennis Ball is about 0.00909 stones.
(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.00909 stones. Competition balls are also tested for bounce height, with the standards requiring that a ball dropped from 254 cm must bounce back to a height of 135 cm to 147 cm.
It's about one-thirty-fifth as heavy as a Beer Keg
The weight of a Beer Keg is about 11.460 stones.
(for US half-barrel, full keg; draft beer; including keg itself, stainless steel)
A typical, half-barrel beer keg weighs 11.460 stones when full. A keg of this size contains 15.5 gallons of beer, or the equivalent of 6.8 cases.
It's about 45 times as heavy as a Golf Ball
The weight of a Golf Ball is about 0.007233 stones.
(per R&A USGA Rules of Golf; maximum rule weight)
According to the Rules of Golf (as approved by the United States Golf Association and the Rules Committee of the Royal and Ancient Golf Club of Saint Andrews), golf balls must weigh no more than 0.007233 stones. Golf balls are not required to have the familiar dimpled pattern, but the design has been popular since its invention in 1905 because it reduces drag while increasing lift.
It's about one-forty-fifth as heavy as a Kangaroo
The weight of a Kangaroo is about 13 stones.
(for red kangaroo, Macropus rufus) (adult, male)
An adult, male red kangaroo weighs up to 13 stones. Fantastic jumpers, red kangaroos can leap horizontally 9 m (30 ft) and vertically 3 m (9 ft) in a single bound.
It's about 60 times as heavy as a Light Bulb
The weight of a Light Bulb is about 0.0054 stones.
(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 0.0054 stones. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about one-seventy-fifth as heavy as a Panda Bear
The weight of a Panda Bear is about 24 stones.
(a.k.a. Giant Panda, Ailuropoda melanoleuca)(Adult, male)