It's about three times as heavy as a Hamster.
In other words, the weight of a Hamster is 0.30 times 623.689508750 grams.(for Syrian hamster, a.k.a. golden hamster, a.k.a. Mesocricetus auratus; adult)
An adult Syrian hamster has a typical weight of about 200 g. Known for transporting food in the pouches of their cheeks so that they can bury it later, some hamsters can store up to 30,000 grams of food in their borrows.
It's about three-tenths as heavy as a Chihuahua.
In other words, 623.689508750 grams is 0.2770 times the weight of a Chihuahua, and the weight of a Chihuahua is 3.610 times that amount.(a.k.a. Chihuahue(o) (FCI standard)
The F&d&ration Cynologique Internationale (FCI) calls for Chihuahuas to weigh about 2,250 grams. Relative to their body sizes, Chihuahuas have the largest brain size of any dog breed.
It's about four times as heavy as a Billiard Ball.
In other words, 623.689508750 grams is 3.82608695652170 times the weight of a Billiard Ball, and the weight of a Billiard Ball is 0.261363636363640 times that amount.(American-style, WPA specifications)
Per the World Pool-Billiard Association, a billiard ball weight must weigh between 155.9223771875 g and 170.09713875 g. 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 four times as heavy as a Puck (Hockey).
In other words, 623.689508750 grams is 3.82608695652170 times the weight of a Puck (Hockey), and the weight of a Puck (Hockey) is 0.261363636363640 times that amount.(Ice hockey)
A standard ice hockey puck weighs between 155.9223771875 g and 170.09713875 g. Hockey pucks can be shot or passed at speeds of up to 160 kph (99 mph) during games.
It's about four-and-a-half times as heavy as a Baseball.
In other words, 623.689508750 grams is 4.29268292682930 times the weight of a Baseball, and the weight of a Baseball is 0.232954545454540 times that amount.(MLB rules)
Per Major League Baseball rules, a baseball must weigh between 141.747615625 g and 148.83499640625 g. 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 one-fifth as heavy as a Brick.
In other words, 623.689508750 grams is 0.220 times the weight of a Brick, and the weight of a Brick is 4.50 times that amount.(Standard, traditional face brick - 1,900 cu. cm (120 cu. in))
A standard, traditional face brick weighs an average of 2,900 grams. The steeple of the Church of St. Martin in Landshut, Germany is said to be the tallest brick tower in the world at a height of 130.6 m (428.5 ft) and was constructed using an estimated 650,000 bricks.
It's about four-and-a-half times as heavy as a Battery (D).
In other words, 623.689508750 grams is 4.620 times the weight of a Battery (D), and the weight of a Battery (D) is 0.2160 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.