It's about 600,000,000,000 times as heavy as a Grain of Sand
In other words, 0.00273 megatonnes is 620,000,000,000 times the weight of a Grain of Sand, and the weight of a Grain of Sand is 0.00000000000160 times that amount.(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.00000000000000440 megatonnes. In 2007, a team of seven in Myrtle Beach created the world's tallest sandcastle, which measured 15.10 m (49.55 ft) in height.
It's about 750,000,000,000 times as heavy as a Sesame Seed
In other words, the weight of a Sesame Seed is 0.000000000001330 times 0.00273 megatonnes.(Sesamum indicum)
A sesame seed weighs approximately 0.000000000000003640 megatonnes. The McDonald's Big Mac sandwich, which is well-known for its sesame seed top bun, accounts for the consumption of an estimated 0.000002010 megatonnes of sesame seeds each day.
It's about 4,500,000,000,000 times as heavy as a Grain of Sugar
In other words, 0.00273 megatonnes is 4,370,000,000,000 times the weight of a Grain of Sugar, and the weight of a Grain of Sugar is 0.0000000000002290 times that amount.(a.k.a. white sugar, a.k.a. white refined sugar, a.k.a. table sugar, a.k.a. sucrose, a.k.a. saccharose)
A grain of sugar weighs approximately 0.0000000000000006250 megatonnes. Sugar consumption varies widely by country; the average citizen of the United States consumes about 0.00000006120 megatonnes of sugar each year.
It's about 9,000,000,000,000 times as heavy as a Poppy Seed
In other words, 0.00273 megatonnes is 9,100,000,000,000 times the weight of a Poppy Seed, and the weight of a Poppy Seed is 0.000000000000110 times that amount.(Papaver somniferum)
Fifty percent oil by weight, a poppy seed weighs approximately 0.000000000000000300 megatonnes. The true pigment of a poppy seed is brown in color, while the characteristic bluish color is an optical illusion caused by a layer of calcium oxalate crystals refracting light rays.
It's about 45,000,000,000,000 times as heavy as a Grain of Salt
In other words, 0.00273 megatonnes is 46,700,000,000,000 times the weight of a Grain of Salt, and the weight of a Grain of Salt is 0.00000000000002140 times that amount.The mass of a grain of salt is approximately 0.00000000000000005850 megatonnes. Salt consumption varies widely by country; the people of the United States consume a combined total of about 0.057 megatonnes of salt each year.