Editor's note: This article has been reviewed and updated for accuracy in 2026. As cannabis becomes legal in more states and countries each year, the number of people looking to try it is also growing. However, the weights and measurements that weed are sold in can be extremely confusing. The Imperial system (miles, inches, feet, yards, ounces, pounds, gallons) is only used by three countries globally and lucky for you, the United States is one of them. All other countries have converted to the Metric system (kilometers, centimeters, grams, liters, etc.) because in a lot of ways it's much simpler to convert between units. Since cannabis is a global herb you thus get a whole mix bag of measurement units depending on where you are and what you are ordering. On top of the metric vs. imperial differences there is also a whole book of old-school slang that was used to describe quantities on the low-down to avoid raising the ire of law enforcement (pre-legalization). Keep reading to understand the common conversions, common retail measurement units, and old-school slang so that you can confidently walk into a dispensary or talk to a supplier in any country, from any generation, with ease. <figure class=aligncenter