Hammerhand is live on Thu Jan 15 23:25 UTC 2026

How big was the grain of sand?

A grain (gr) is a precise unit of mass, equal to 64.79891 milligrams (mg) or approximately 0.0648 grams (g), with 1 gram containing about 15.43 grains, making it ideal for small measurements like gunpowder or precious metals. Key Conversions 1 Grain = 64.79891 mg 1 Grain ≈ 0.0648 g (since 1000 mg = 1 g) In Practical Terms If you have 100 grains, that's roughly 6,480 milligrams or 6.48 grams. Because it's so small, a grain is used for precise measurements where grams or milligrams would be too large, like in firearms ammunition or jewelry.