It's about two-and-a-half times as heavy as a Battery (C)
In other words, the weight of a Battery (C) is 0.430 times 0.3281250 pounds.(Alkaline)
A "C" size battery weighs 0.140 pounds. C batteries are typically used in medium-drain devices such as musical instruments.
It's about two-fifths as heavy as a Can of Soup
In other words, 0.3281250 pounds is 0.430 times the weight of a Can of Soup, and the weight of a Can of Soup is 2.30 times that amount.(for Campbell''s Condensed Tomato Soup, 317.9 ml)
A can of Campbell''s Tomato Soup weighs 0.770 pounds. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.
It's about two-and-a-half times as heavy as a Tennis Ball
In other words, 0.3281250 pounds is 2.580 times the weight of a Tennis Ball, and the weight of a Tennis Ball is 0.3880 times that amount.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 0.1270 pounds. 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-third as heavy as a Football (American)
In other words, 0.3281250 pounds is 0.36206896551720 times the weight of a Football (American), and the weight of a Football (American) is 2.7619047619050 times that amount.(a.k.a. "pigskin") (NFL standard)
Per National Football League official rules, an American football must weigh between 0.8750 pounds and 0.93750 pounds. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.
It's about one-third as heavy as a Football (Soccer)
In other words, the weight of a Football (Soccer) is 2.90 times 0.3281250 pounds.(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 0.90 pounds and 0.990 pounds. 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 one-third to one-half the size of a modern football.
It's about three times as heavy as a Golf Ball
In other words, 0.3281250 pounds is 3.240 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.30860 times that amount.(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 0.10130 pounds. 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-fourth as heavy as a Basketball
In other words, 0.3281250 pounds is 0.238636363640 times the weight of a Basketball, and the weight of a Basketball is 4.19047619040 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 1.3750 pounds. These balls have 4,118 pebbles each with a diameter of 2.5 mm