It's about one-two-thousandth as heavy as a Grand Piano
In other words, 250 grams is 0.00056 times the weight of a Grand Piano, and the weight of a Grand Piano is 1,800 times that amount.(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 450,000 grams. Well-made pianos such as this may last 75 to 100 years.
It's about one-two-thousandth as heavy as a Polar Bear
In other words, 250 grams is 0.000484 times the weight of a Polar Bear, and the weight of a Polar Bear is 2,070 times that amount.(Ursus maritimus) (adult, male)
An adult, male polar bear weighs between 516,000 grams. Polar bears are so heavily insulated by their 9.9 cm (3.9 in) layer of blubber that they are often difficult to detect using infrared photography sensors.
It's about one-two-thousandth as heavy as a Grizzly Bear
In other words, 250 grams is 0.00048 times the weight of a Grizzly Bear, and the weight of a Grizzly Bear is 2,080 times that amount.(a.k.a. brown bear, a.k.a. silver bear, Ursus arctos horribilis) (Adult, male, coastal area population average)
An adult, male grizzly bear from a coastal area (where food is plentiful) can weigh up to 521,000 grams. In spite of their tremendous size, grizzly bears can run at speeds of up to 55 kph (34 mph).
It's about one-two-thousand-five-hundredth as heavy as a Cow
In other words, the weight of a Cow is 2,700 times 250 grams.(for Holstein, a.k.a. Holstein Friesian, a.k.a. Friesian, Bos primigenius) (adult, heifer)
A mature Holstein cow (the well-known black-and-white, spotted breed of cow) typically weighs 680,000 grams. President William Howard Taft (1909 - 1913) kept a Holstein cow named Pauline Wayne on the White House grounds — a gift from a Wisconsin senator and the source of the First Family's milk.
It's about one-six-thousand-five-hundredth as heavy as a Car
In other words, 250 grams is 0.0001513 times the weight of a Car, and the weight of a Car is 6,609 times that amount.(for 2009 Ford Taurus) (curb weight)
A 2009 Ford Taurus weighs 1,652,000 grams. The first mass-produced car, the Curved Dash Oldsmobile — introduced in 1901 — weighed just 386,000 grams.
It's about one-seven-thousand-five-hundredth as heavy as a Giraffe
It's about one-eight-thousand-five-hundredth as heavy as a Rhinoceros
In other words, the weight of a Rhinoceros is 8,300 times 250 grams.(for Black rhinoceros, Diceros bicornis) (Adult, male)
An adult black rhinoceros weighs between 2,100,000 grams. Rhinoceros are extremely aggressive — nearly one of every two males will die as a result of fighting with other rhinoceros.