It's about seventeen-and-a-half times as heavy as a Tennis Ball.
In other words, the weight of a Tennis Ball is 0.0578 times 643.0329 pennyweights.(ITF Standard; for Type 2 ball)
Per International Tennis Federation standard, regulation tennis balls must weigh about 37.10 pennyweights. 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 twenty times as heavy as a Golf Ball.
In other words, 643.0329 pennyweights is 21.770 times the weight of a Golf Ball, and the weight of a Golf Ball is 0.04593 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 29.530 pennyweights. 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 thirty times as heavy as a Light Bulb.
In other words, the weight of a Light Bulb is 0.034 times 643.0329 pennyweights.(a.k.a. lamp) (for A19-size, 60w, incandescent bulb by Bulbrite; package weight)
A standard, sixty-watt light bulb weighs about 22 pennyweights. The tightly-coiled filament inside a bulb of this size would measure about 579mm if uncoiled and stretched out.
It's about one-thirtieth as heavy as a Dalmatian.
In other words, 643.0329 pennyweights is 0.0339 times the weight of a Dalmatian, and the weight of a Dalmatian is 29.50 times that amount.(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 19,000 pennyweights. 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 40 times as heavy as a Battery (AA).
In other words, 643.0329 pennyweights is 42 times the weight of a Battery (AA), and the weight of a Battery (AA) is 0.024 times that amount.(Alkaline)
An "AA" size battery weighs 15 pennyweights. AA batteries came into common use during World War II and were given their name by the American National Standards Institute (ANSI) Committee C18 because they were smaller than the "A" size batteries which were invented first.
It's about one-forty-fifth as heavy as a Toilet.
In other words, the weight of a Toilet is 43.70 times 643.0329 pennyweights.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 28,000 pennyweights. 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 50 times as heavy as a Mouse.
In other words, the weight of a Mouse is 0.021 times 643.0329 pennyweights.(a.k.a. "House mouse", Mus musculus) (adult)
The weight of a mouse is typically an average of 14 pennyweights. While most mice typically live two to three years, the Methuselah Mouse Prize — an award administered by a non-profit organization which advances aging-related research — was once awarded to a team of scientists whose research resulted in a mouse living just under five years.