It's about 400 times as heavy as a Penny
In other words, the weight of a Penny is 0.0025 times 0.0000000010000280 megatonnes.(United States) (formally one-cent coin) (Union shield design, 2010-present)
The weight of a United States penny is 0.00000000000250 megatonnes. 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-four-hundredth as heavy as a Horse
In other words, 0.0000000010000280 megatonnes is 0.0024 times the weight of a Horse, and the weight of a Horse is 420 times that amount.(Equus ferus caballus) (Arabian, adult)
n Arabian riding horse (or similar breed) weighs between 0.000000420 megatonnes. During races, horses must carry jockeys and their equipment, which in the Kentucky Derby, for example, can weigh up to 0.0000000540 megatonnes.
It's about one-four-hundred-fiftieth as heavy as a Grand Piano
In other words, the weight of a Grand Piano is 450 times 0.0000000010000280 megatonnes.(for Steinway & Sons, Model D Concert Grand Piano)
A Grand Piano, of the kind used for concert performances in large music halls, weighs 0.000000450 megatonnes. Well-made pianos such as this may last 75 to 100 years.
It's about one-five-hundredth as heavy as a Polar Bear
In other words, 0.0000000010000280 megatonnes is 0.00194 times the weight of a Polar Bear, and the weight of a Polar Bear is 515 times that amount.(Ursus maritimus) (adult, male)
An adult, male polar bear weighs between 0.0000005160 megatonnes. 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-five-hundredth as heavy as a Grizzly Bear
In other words, 0.0000000010000280 megatonnes is 0.00192 times the weight of a Grizzly Bear, and the weight of a Grizzly Bear is 521 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 0.0000005210 megatonnes. In spite of their tremendous size, grizzly bears can run at speeds of up to 55 kph (34 mph).
It's about 550 times as heavy as a Playing Card
In other words, the weight of a Playing Card is 0.0018 times 0.0000000010000280 megatonnes.(ISO 216 B8 size, 2.5" x 3.5")
A single ISO 216 B8-size playing card weighs 0.00000000000180 megatonnes. Although this size is the most common home playing card, many casinos use "bridge size" cards — 2,640 sq. mm (4.036 sq. in) smaller in area.
It's about one-six-hundred-fiftieth as heavy as a Cow
In other words, the weight of a Cow is 670 times 0.0000000010000280 megatonnes.(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 0.000000680 megatonnes. 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.