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Weed Measurements Guide: Gram, Eighth, Quarter

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Weed Measurements Guide: Gram, Eighth, Quarter

Posted by Marijuana Doctors on 11/21/2018 in Infographics

Updated on August 26, 2020. Medical content reviewed by Dr. Joseph Rosado, MD, M.B.A, Chief Medical Officer

It’s no secret that cannabis has made huge strides since the start of prohibition in 1930. Everything from how it’s grown to how it’s cultivated and sold has evolved, including the terms we use to describe it. But there’s one thing about cannabis that has changed very little over the years — the way we measure it.

While weed measurements have been a consistent factor in the evolution of marijuana, there’s no doubt they’re confusing. Measurement terms start in low quantities using the metric system, but jump to the imperial system, or ounces, as weight increases. Confusing right? Not to mention, a variety of factors including strain, product size and density make it difficult to conceptualize cannabis weight.

For example: buds can be large with spindly leaves or dense and compact, but the two can still weigh the exact same amount.

With that in mind, we’re tackling the confusing topic of cannabis quantities once and for all. You’ll learn what exactly a gram, quarter, eighth, half, etc. means. So even if it’s your first time in a dispensary, you won’t feel like it. Check out our visual guide to cannabis to learn what you should expect upon making your first purchase.

Cannabis Measurements Explained

Marijuana has its own terminology, so it can feel like you’re listening to another language if you’re new to the cannabis scene. Understanding weed measurements is Cannabis 101 and part of being a well-informed consumer, so let’s get started! Whether in a dispensary or on the street, marijuana is most commonly sold in 5 different measurements, all of which use an ounce as the baseline denominator:

  • Gram (1,000 milligrams)
  • Eighth (3.5 grams)
  • Quarter (7 grams)
  • Half (14 grams)
  • Ounce (28.35 grams)

How Much Is a Gram of Weed?

A gram of weed is the smallest measurement you can reasonably expect a dispensary to sell, although some do sell half-gram joints. If you’re curious about trying a new strain or it’s your first time smoking marijuana, this is a good measurement to start with. A gram will typically allow for two or three smoking sessions, depending on your tolerance level. Additionally, it’s the cheapest weed measurement. Most pre-rolls sold in dispensaries usually weigh one gram and are often included as a freebie (with purchase) for new patients, so it always pays to inquire about new patient deals at your local dispensary.

What Is an Eighth of Weed?

One-eighth ounce of weed is most commonly referred to as an “eighth.” Its metric equivalent is 3.5 grams and it is the most popular weed measurement. Purchasing an eighth allows you to familiarize yourself with a particular strain beyond the point of a couple smoking sessions and without breaking the bank. An eighth will typically last a light user two to three weeks. It will last a moderate to heavy user up to one week.

What Is a Quarter of Weed?

Moving into the larger weed measurements, a quarter or ¼ ounce holds the metric equivalent of 7 grams. It’s both double the weight and price of what a user would pay for an eighth — measurements continue to double as you move up to larger quantities. Most people who purchase a quarter are typically moderate users who want to keep a particular strain around for a while. We’d expect a quarter to last up to two weeks for moderate users and four weeks for light users.

What Is a Half Ounce of Weed?

A half ounce of weed or “half” is rather self-explanatory. This weighs in at 14 grams, double the quantity of a quarter. It’s typically a purchase for moderate smokers who’d like to keep a strain for longer than a couple weeks or heavy smokers who smoke multiple times a day. If you’re a light smoker, we’d recommend that you stick with a smaller quantity or you’ll end up storing this for longer than it will stay fresh.

How Much Is an Ounce of Weed?

An ounce of weed is the largest quantity sold in dispensaries and generally the legal limit for purchasing marijuana in a single transaction. However, there are exceptions to this rule, so be sure to check your state laws. This is typically a purchase for a heavy smoker and the most expensive of marijuana measurements — upwards of $450 for quality cannabis in legal states. If you’re interested in buying an ounce, you might want to consider what you’ll need a large quantity for. Are you treating chronic pain? Are you attending a concert? Is there a cannabis-related event you and your friends are planning for? Your intentions for the ounce will likely determine whether it lasts months or days.

How Much Does an Eighth of Weed Cost?

Prices of marijuana vary around the country and largely fluctuate based on strain and quality, so there’s no single answer. Since an eighth is typically the most common quantity purchased, we rounded up the average prices in recreational states across the country. This takes into account quality cannabis (middle and top shelf), various locations by state and multiple dispensaries in surveyed cities.

  • California: $40 – $56
  • Oregon: $25 – $37
  • Washington: $30 – $43
  • Alaska: $40 – $60
  • Nevada: $30 – $55
  • Colorado: $20 – $30
  • Michigan: $40 – $60
  • Massachusetts: $45 – $60
  • Vermont: $40 – $55
  • Maine: $35 – $50

Now you can walk into your local dispensary and feel confident about asking for a quantity that matches your desired price point, whether it’s indica or sativa, flower or extracts.

Weed measurements can be confusing. Learn what cannabis terms like a gram, eighth, quarter and half mean using our visual guide and how much you can expect to pay by state.

A guide to weed weights

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  1. Breakdown of weed measurements
  2. How to make sure you’re getting what you pay for
  3. Want to learn more?

Gram. Eighth. Quarter. Half. Ounce.

If you’re not familiar with how cannabis is weighed, measured, and sold, all of those terms can feel like a huge question mark. It’s clear they’re units of measurement for weed — but what exactly do they all mean?

Breakdown of weed measurements

Let’s start with the smallest unit of measurement and work our way up.


A gram is defined as “metric unit of mass equal to one-thousandth of a kilogram.” A gram is a small unit of measurement, which makes it a solid choice for cannabis consumers who don’t want to purchase weed in small amounts. For example, if they’re looking to try a new strain or don’t consume cannabis frequently.

The rest of the units of measurement for cannabis have to do with ounces — either in full or a fraction.


An eighth is an eighth of an ounce — or 3 .5 grams of weed. The eighth is one of the most popular, if not the most popular, weight to sell cannabis. For many people, an eighth of weed is the perfect amount; it’s enough to feel like you have plenty of weed at your disposal, but not so much that you feel like you have too much weed and not enough time to consume it.

The eighth, 3 .5 grams of weed, is one of the most popular, if not the most popular, weight to sell cannabis. Photo by: Gina Coleman/Weedmaps

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The next unit of measurement is a quarter. A quarter refers to a quarter of an ounce, and it weighs approximately 7 grams. Technically, a quarter weighs 7.0874 grams, but the industry standard is to round down to the nearest gram.

A quarter refers to a quarter of an ounce, and it weighs approximately 7 grams. Photo by: Gina Coleman/Weedmaps

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A half is a half-ounce of weed, which weighs 14 grams.


And a full ounce? An ounce weighs 28 grams.

When you’re purchasing weed in a dispensary, typically, the highest volume you can buy at any one time caps out at an ounce. But people who work within the cannabis industry, such as buyers and dispensary owners, can buy in larger quantities — including pounds and kilograms. One pound is made up of 16 ounces — which weighs in at a truly impressive 448 grams.

Here’s a quick reference chart of how weed is measured — and how much each measurement weighs in grams:

  • 1 eighth = ⅛-ounce = 3.5 grams
  • 1 quarter = ¼-ounce = 7 grams
  • 1 half = ½-ounce = 14 grams
  • 1 ounce = 28 grams
  • 1 pound = 16 ounces = 448 grams

How to make sure you’re getting what you pay for

When you purchase weed at the dispensary — whether you’re getting a single gram to test out a new grower or investing in a full ounce of your go-to strain — you want to make sure you’re getting what you paid for. And the only way to know for sure that your cannabis is the proper weight is to weigh it.

Your budtender should weigh out your cannabis in clear view; this way, you can see exactly how many grams are being weighed out. Photo by: Gina Coleman/Weedmaps

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Your budtender should weigh out your cannabis in clear view; this way, you can see exactly how many grams are being weighed out — and how that corresponds to how much you asked for. If you get to the dispensary and can’t remember the gram conversions, just ask your budtender; he or she will be able to tell you how many grams are in an eighth, quarter, half, or ounce — and then can weigh out your weed to show you that the cannabis you’re taking home is the accurate weight.

In some states with adult-use cannabis laws, flower is required to come pre-packaged and was measured prior to arriving to the dispensary. If you still want to ensure that its the weight indicated on the packaged, you can weigh the flower with a scale at home.

Want to learn more?

Want to explore more about weed measurements and weights? Check out these articles:

A guide to weed weights Copy article link to clipboard. Link copied to clipboard. Contents Breakdown of weed measurements How to make sure you’re getting what you pay for