
What is an Eighth of Cannabis & What Can You Do With It?
April 06, 2025
As you’re shopping for your favorite cannabis flower, one term you'll inevitably encounter when deciding how much to buy is "eighth." The most commonly purchased amount of cannabis, an eighth is 3.5 grams or one-eighth of an ounce. In this guide, we'll demystify what exactly constitutes an eighth of cannabis, explore what it looks like, discuss its cost, and delve into the various ways you can make the most of this quantity.
What is an Eighth?
When people say “an eighth,” they’re referring to one-eighth of an ounce, or 3.5 grams of marijuana flower.1 Let’s break that down a little more: An ounce of marijuana is 28 grams, and when you divide 28 by 8, you get 3.5. Outside of dispensaries, you may hear an eighth referred to as a “slice,” because a whole pizza can typically be divided into eight slices.2
An eighth is just one of several standardized amounts sold in dispensaries, along with a gram, a quarter, a half, and an ounce. An eighth is often the most common amount of flower purchased because many cannabis enthusiasts find it provides a perfect balance: It’s enough for multiple sessions (depending on your consumption habits), but not an overwhelming amount that might go bad before you can get through all of it.3 An eighth is also a great way to sample new types of cannabis, from beginner strains to more potent varieties.
Wait, What's Up with These Cannabis Measurements?
If all these measurements have your head spinning, you’re not alone. While the U.S. sticks to the imperial system for most things, cannabis is still measured in grams—bringing the metric system into the mix. This can make conversions tricky and add an extra layer of confusion when shopping at your local dispensary. However, understanding cannabis quantities is essential, as possession limits vary widely from state to state. Knowing exactly how much you have can help you stay within legal guidelines and make more informed purchasing decisions.
What Does an Eighth of Cannabis Look Like?
The appearance of an eighth can vary depending on the density of the buds—which differs from strain to strain—but it will always weigh the same.1 If you prefer dense, top-shelf buds, just a couple of chunky nugs might make up your entire eighth. On the other hand, strains with smaller, more compact, “popcorn” buds may take a handful to reach the same weight. You may also be able to buy eighths of shake or kief, both of which will also appear different. Generally, an eighth tends to amount to 2-4 buds of cannabis. For a visual comparison, an eighth of cannabis is roughly the size of a kiwi.4
How Much Does an Eighth of Flower Cost?
An eighth’s cost fluctuates based on a few things, including the type of strain you’re buying and what state you’re buying it in. If you’re looking to purchase an eighth, you could spend anywhere from $25 to $60. It really depends on your state’s specific cannabis market.5
What Can You Do With an Eighth of Flower?
You might think 3.5 grams worth of flower isn’t enough, but if you’re not a heavy consumer, or you want to sample a few different strains, an eighth can be the perfect amount. Here’s what you can do with an eighth of flower:
Roll Three 1-Gram Joints
An eighth of cannabis provides enough flower to roll approximately three standard-sized joints. That’s enough to get some cannabis enthusiasts through an average workweek. Just remember to store flower properly to ensure you don’t waste your freshly-rolled bud.5
Roll Seven 0.5-Gram Joints
You can stretch your eighth even further by rolling smaller joints. By using just 0.5 grams per joint, you can roll up to seven, making this a great option if you prefer lighter sessions or like to share with friends without going through your supply too quickly.5
Roll 2 Blunts
Blunts typically contain around 1-1.5 grams of cannabis each, meaning an eighth will yield two standard blunts with about 0.5 grams left over. If you prefer thinner blunts, you could stretch your eighth to roll three.6 Either way, make sure to use a quality wrap and store them properly to maintain flavor and moisture.
Pack 15 One-Hitters
For those who prefer quick, controlled doses, an eighth provides enough cannabis to pack approximately 15 one-hitters, assuming each holds about 0.25 grams. This method is perfect for microdosing or discreet consumption throughout the day.
Pack 7 Bowls
The number of bowls you can pack from an eighth depends on the size of your piece and your packing style. If you typically pack half-gram bowls, you’ll get around seven full sessions. For smaller bowls, you might be able to extend your stash even further.7
How Long Will an Eighth Last?
Think of an eighth as the perfect amount to buy to try a strain for the first time. Depending on your consumption habits, it could give you enough sessions to make it through the weekend, or it could last you through the whole week. In general, how long an eighth lasts is going to be entirely dependent on you as a consumer.3 Heavy smokers are going to get a couple of days while light smokers could get more than a week.
How Does an Eighth Compare to Other Marijuana Measurements?
An eighth isn’t the only marijuana measurement worth knowing. It’s also good to know what a quarter and an ounce are. Here’s how an eighth measures up against other common quantities:
How Many Grams Are in an Eighth?
An eighth of marijuana weighs exactly 3.5 grams. While that number may seem small, it’s enough to roll multiple joints, pack several bowls, or even make a few blunts. For a real-world comparison, 3.5 grams is about the weight of a quarter teaspoon of sugar.
How Many Eighths Are in a Quarter?
A quarter of marijuana, sometimes called a “quad,” refers to a quarter (¼) of an ounce, or 7 grams. This means a quarter comprises two eighths, with each eighth weighing around 3.5 grams.8 If you’re looking to stock up without committing to a full ounce, a quarter is often a great middle ground.
How Many Eighths Are in an Ounce?
An eighth gets its name because it’s one-eighth of an ounce. An ounce of cannabis weighs 28 grams, and there are exactly eight eighths (3.5 grams) in an ounce. Buying in larger quantities, like an ounce, is often more cost-effective per gram, making it a popular choice for regular consumers who want to save money and reduce trips to the dispensary.8
FAQs About an Eighth of Cannabis
Navigating through cannabis measurements can be confusing, but asking questions is a great way to become more knowledgeable. Here are answers to a few common questions:
Is an eighth the same as a slice?
Yes, an eighth is colloquially referred to as a "slice," emphasizing its one-eighth portion of an ounce.2
Is an eighth the same as 3.5 grams?
Yes, an eighth is precisely 3.5 grams, or one-eighth of an ounce (which is 28 grams).
What is a five-gram eighth?
A five-gram eighth is a great deal for cannabis consumers, offering an extra 1.5 grams on top of the standard 3.5 grams—all for the same price. If you spot a five-gram eighth sale at your local dispensary, it’s worth taking advantage of, as you're essentially getting 1.5 grams of cannabis as a bonus.7
How much does an eighth cost?
An eighth can cost anywhere from $25 to $60, but the price you pay will depend on several factors, including strain type, marijuana quality, and your state’s cannabis market and taxes.5
How many joints can you roll with an eighth of cannabis?
The number of joints you can roll from an eighth of cannabis depends on the size of each joint. If you prefer larger, full-sized joints, you can roll three 1-gram joints from an eighth. Rolling smaller, half-gram joints means you’ll get about seven joints out of your eighth.5
Buying an Eighth of Flower
Whether you're exploring beginner strains or searching for more potent options, an eighth of flower is a perfect amount to experiment with. It gives you the flexibility to roll joints or blunts, pack bowls, and indulge however you like. And, if you’re a smart dispensary shopper, keep an eye out for those five-gram deals to get a little extra bang for your buck.
Sources:
1. “Eighth,” Leafly.com, https://www.leafly.com/learn/cannabis-glossary/eighth
2. “Slice,” Ganjapreneur, https://www.ganjapreneur.com/vocab/slice/
3. “A visual guide to the most common measurements of weed,” Business Insider, May 13, 2022, https://www.businessinsider.com/guides/home/weed-measurements
4. “Marijuana Measurements & Sizes,” Montana Department of Revenue, https://mtrevenue.gov/cannabis/education/marijuana-measurements-sizes/
5. “How Much Is an Eighth of Weed?” Veriheal, September 9, 2024, https://www.veriheal.com/blog/how-much-is-an-eighth-of-weed/
6. “What is an 8th of Weed?” NuggMD, February 5, 2025, https://www.nuggmd.com/blog/what-is-an-8th-of-weed
7. “How much is an eighth of weed?” Weedmaps, August 25, 2022, https://weedmaps.com/learn/products-and-how-to-consume/how-much-is-an-eighth
8. “The complete guide to weed measurements and prices,” Weedmaps.com, https://weedmaps.com/learn/products-and-how-to-consume/weed-measurements
Please consume responsibly. This product may cause impairment and may be habit forming. There may be health risks associated with consumption of this product. State laws impact what dispensaries can and can’t sell to recreational customers and medical marijuana patients. Not every type of product, consumption method, dosage form, or potency mentioned on this blog will be permitted in all locations.