It's about 45 times as heavy as an Eye (Human)
It's about 55 times as heavy as a Quarter
In other words, 0.310 kilograms is 54.670 times the weight of a Quarter, and the weight of a Quarter is 0.01829 times that amount.(United States quarter-dollar coin) (a.k.a. Quarter dollar, a.k.a. America the Beautiful quarter, a.k.a. two bits)
The America the Beautiful series quarters, which began to enter circulation in 2017, weigh 0.00567 kilograms each. In answer to the common riddle, there are 119 ridges around the edge of the coin in its current design.
It's about 60 times as heavy as a sheet of Paper
In other words, 0.310 kilograms is 62 times the weight of a sheet of Paper, and the weight of a sheet of Paper is 0.016 times that amount.(for US Letter, a.k.a. ANSI A; 215.9mm by 279.4mm (8.5 in x 11 in); 20lb)
The weight of a ream (500 sheets) of 9.10 kilograms, 8.5 inch x 11 inch paper is 2 kg, each sheet weighing 0.005 kilograms. Paper of this size has a thickness of 0.004 caliper (0.1 mm).
It's about 75 times as heavy as a Die (Dice)
In other words, the weight of a Die (Dice) is 0.013 times 0.310 kilograms.(for six-sided, 16 mm, rounded cube)
A die, of the size most commonly used in board games and casinos, typically weight 0.0041 kilograms. The use of dice and dice-like tools predates written history, with the oldest known examples belonging to a 5,000-year old backgammon set uncovered during an archaeological dig in modern-day Iran.
It's about one-ninety-fifth as heavy as a Dalmatian
In other words, the weight of a Dalmatian is 95.20 times 0.310 kilograms.(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 27 and 32 kg. 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 100 times as heavy as a Penny
In other words, 0.310 kilograms is 120 times the weight of a Penny, and the weight of a Penny is 0.0083 times that amount.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 0.0025 kilograms. According to a 2010 report by the United States Mint, the cost of manufacturing and distributing a penny is $0.0179 — more than its face-value.
It's about one-one-hundred-fiftieth as heavy as a Toilet
In other words, 0.310 kilograms is 0.00711 times the weight of a Toilet, and the weight of a Toilet is 141 times that amount.(KOHLER Round front sitting flush toilet, model #K-11471-0)
The weight of a typical round front sitting flush toilet is 43.6 kg. 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.