It's about one-seventy-fifth as heavy as a Grain of Sand
In other words, the weight of a Grain of Sand is 77 times 0.000903 grains.(medium grain)
With tremendous variety in the size of grain and the component material, grains of sand weigh an average of 0.068 grains. 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 one-sixtieth as heavy as a Sesame Seed
In other words, 0.000903 grains is 0.0161 times the weight of a Sesame Seed, and the weight of a Sesame Seed is 62.10 times that amount.(Sesamum indicum)
A sesame seed weighs approximately 0.0562 grains. The McDonald's Big Mac sandwich, which is well-known for its sesame seed top bun, accounts for the consumption of an estimated 31,000,000 grains of sesame seeds each day.
It's about one-tenth as heavy as a Grain of Sugar
In other words, 0.000903 grains is 0.0936 times the weight of a Grain of Sugar, and the weight of a Grain of Sugar is 10.70 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 0.00965 grains. Sugar consumption varies widely by country; the average citizen of the United States consumes about 944,000 grains of sugar each year.
It's about one-fifth as heavy as a Poppy Seed
In other words, the weight of a Poppy Seed is 5 times 0.000903 grains.(Papaver somniferum)
Fifty percent oil by weight, a poppy seed weighs approximately 0.0046 grains. 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 as heavy as a Grain of Salt