
It's about threefifths as heavy as a Football (Soccer)
In other words, 250 grams is 0.580 times the weight of a Football (Soccer), and the weight of a Football (Soccer) is 1.70 times that amount.
(a.k.a. Soccer, a.k.a. Association Football) (FIFA Law 2 specification)According to FIFA's Law of the Game number 2, a football must weigh between 410 g and 450 g. An artifact on display at the Smith Art Gallery in Museum in Stirling, Scotland is said to be the world's oldest football and is about onethird to onehalf the size of a modern football.
It's about oneandninetenths times as heavy as a Battery (D)
In other words, 250 grams is 1.850 times the weight of a Battery (D), and the weight of a Battery (D) is 0.5410 times that amount.
(Alkaline)A "D" size battery weighs 135 g. The D size battery is the oldest of the modern battery sizes, first invented by the National Carbon Company in 1898.
It's about twofifths as heavy as a Basketball
In other words, 250 grams is 0.40084047670 times the weight of a Basketball, and the weight of a Basketball is 2.4947580350 times that amount.
(NBA official ball standards, Size 7)A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 623.68950875 g. These balls have 4,118 pebbles each with a diameter of 2.5 mm
It's about twoandahalf times as heavy as a Deck of Cards
In other words, the weight of a Deck of Cards is 0.370 times 250 grams.
(ISO 216 B8 size, a.k.a. "poker size" 63 x 88 mm, 52card deck)A deck of 52 ISO 216 B8size playing cards weighs 94 g. Utilizing nearly 3,700 decks, the recordholding largest card tower was built in early 2010, stood over 3.5 m (11 ft), and weighed over 230,000 grams.
It's about four times as heavy as a Battery (C)
It's about onefourth as heavy as a liter of Water
In other words, 250 grams is 0.2499930 times the weight of a liter of Water, and the weight of a liter of Water is 4.000112 times that amount.
(fresh; 4° C / 39.2° F; maximum density)Contrary to popular belief, 1 liter (0.0.264172052358148 gal) of water at 4° C / 39.2° F (its point of maximum density) weighs 1,000.028 grams rather than 1 kg exactly. The total volume of water on the planet Earth is about 13,590,000,000,000,000,000 (13.59 quntillion) L (3,590,000,000,000,000,000 gallons).
It's about fourandahalf times as heavy as a Tennis Ball
In other words, 250 grams is 4.330 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.2310 times that amount.
(ITF Standard; for Type 2 ball)Per International Tennis Federation standard, regulation tennis balls must weigh about 56.0 g to 59.4 g. 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. 
