How Many Grams Are In An Ounce Of Marijuana?

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If you are new to cannabis or coming back after a long absence, chances are you that you may not know how many grams are in an ounce. That may seem like a straightforward thing to cannabis veterans, but for rookies, it may not be so straightforward.

The ounce is largely the unit of measure that the cannabis industry is built upon. Selling cannabis by the gram is becoming more common, but selling cannabis by the 1/8th or ounce is still very common too, and has been that way for decades. In order to know what is an eighth of cannabis and how much it weighs a consumer needs to first know how many grams are in an ounce.

An eighth is as exactly as it sounds – one-eighth of one ounce. Many people will say that an ounce of cannabis weighs approximately 28  grams, but that is not entirely accurate. That’s because there are more grams in a pound than many cannabis consumers think.

The basic math error that many cannabis consumers make is taking 3.5 grams of cannabis (the weight of a common eighth at a dispensary), multiplying it by 8 to arrive at 28 grams for one ounce, and then multiplying that by 16 to arrive at 448 grams for a pound. The problem with that is that a pound actually weighs 453.592 grams.

If you do the math in reverse fashion compared to how it was performed above, taking 453.592 grams and dividing it by 16 (there are 16 ounces in a pound), an ounce of cannabis should actually weigh 28.3495 grams.

Of course, if a dispensary is selling ounces that weigh approximately 28 grams, I don’t know that many consumers would care. But, if that ounce is 28 grams, it is technically a bit light. I don’t personally scoff at dispensaries that round down to 28 grams, but I definitely thank those that keep their ounces approximate!

Johnny Green
About Johnny Green 2203 Articles
Johnny Green is a cannabis activist from Oregon. Johnny has a bachelor's degree in public policy, and believes that the message should always be more important than the messenger. #LegalizeIt #FreeThePlant