An ounce is ~28.3 grams, and an eighth is ~3.5 grams. For the most part, the US Imperial units are just division units when it comes to marijuana sales, not ac

An ounce is ~28.3 grams, and an eighth is ~3.5 grams. For the most part, the US Imperial units are just division units when it comes to marijuana sales, not actually measurements. When it's sold, it is more commonly weighed using the metric scale than imperial units inside the United States.