Cannabis Measurements Explained: Gram, Eighth, Quarter, and Ounce

Cannabis measurements all divide down from one retail ounce, labeled as 28 grams. A half ounce is 14 grams, a quarter is 7 grams, an eighth is 3.5 grams, and a gram is the smallest unit most dispensaries stock [1]. The exact avoirdupois ounce is 28.3495 grams per NIST [4].

If you have ever wondered why dispensaries price flower in fractions of an ounce instead of round grams, the answer is mostly history. The cannabis market grew up under prohibition, when scales were hidden and sales were counted in ounces and fractions of ounces. When legal shops opened, they kept the same vocabulary so customers could compare prices without relearning the math.

That is why the standard cannabis weight ladder looks like this: 1 g, 3.5 g (eighth), 7 g (quarter), 14 g (half), and 28 g (ounce), with eight eighths making one full ounce [1].

What Are the Standard Cannabis Measurements?

The standard cannabis measurements are 1 gram, 3.5 grams (an eighth), 7 grams (a quarter), 14 grams (a half ounce), and 28 grams (an ounce). Every step is built from the avoirdupois ounce rather than a metric increment.

• 1 gram — the smallest unit, useful for sampling a strain or topping off a session
• 3.5 grams (one eighth) — the most common dispensary purchase size
• 7 grams (one quarter) — two eighths, a step up for moderate use
• 14 grams (one half ounce) — the middle of the ladder, less common but cheaper per gram
• 28 grams (one ounce) — the legal single-purchase ceiling in most adult-use states [1]

Standard cannabis measurements compared side by side:

The whole chart is anchored to a single math fact: one avoirdupois ounce equals 28.3495 grams per NIST [4]. The industry rounds down to 28 grams at retail because it makes every fraction a clean number, and because eight eighths of 3.5 grams each equal exactly 28 grams. That rounding is why a true ounce on a precision scale reads about 0.35 grams heavier than the label promises.

Because the units are fractions of an ounce rather than metric steps, prices per gram tend to drop as you move up the ladder. A single gram usually carries the highest price per gram in the store, while a quarter and an ounce lock in meaningful discounts.

If you are just learning the language of the dispensary menu, treat the eighth as the default unit and everything else as a multiple of it. Two eighths make a quarter, four make a half, and eight make an ounce.

For a deeper look at what is actually inside the flower you are weighing — beyond raw weight — A Guide to Terpenes and Their Effects walks through the terpenes and effects that shape each strain. And if you want context on how a different group of adults is buying and using the same measurements, How Seniors Are Using Cannabis in New York looks at how seniors are using cannabis in New York.

How Much Is a Gram of Cannabis?

A gram of cannabis is the smallest unit most dispensaries will weigh out, roughly the size of a walnut meat depending on bud density. It is the standard size for single pre-rolls and small sample jars [1], and it yields about one large joint or two to three half-gram joints.

Customers buy single grams for a few common reasons:

• They want to try a new strain without committing to a larger amount
• They only need enough for one pre-roll or a short evening session
• They want to check aroma, trim, and cure before buying an eighth
• They are topping off an existing stash to hit a specific weight

In terms of price, a gram usually carries the highest cost per gram in the store. That is partly the labor of weighing and packaging a small amount, and partly the convenience premium. If you already know you like the strain, stepping up to an eighth almost always lowers the per-gram price.

A single gram can lose aroma faster than a sealed eighth because there is less material holding humidity in the jar. If you are weighing out and storing smaller amounts, How Long Does Weed Stay Fresh? covers how long cannabis stays fresh under typical storage conditions and how to tell when a bud is past its prime.

How Much Is an Eighth of Cannabis (3.5 Grams)?

An eighth of cannabis is exactly 3.5 grams, because it is one-eighth of a 28-gram retail ounce [1]. Eight eighths make a full ounce, four make a half, and two make a quarter. If you remember only one number from this guide, remember 3.5.

An eighth is the workhorse of the retail ladder for a reason:

• It is large enough to share across a few sessions without running out the same day
• It is small enough to finish a quality strain before it loses freshness
• It offers a noticeable per-gram discount over single grams
• It fits in a typical eighth jar, which every customer recognizes on the shelf

A full eighth fills a small glass jar loosely packed, or a medium jar if the buds are dense. Customers who care about cure and humidity often prefer eighths over larger sizes for that reason: the bud does not sit around as long.

One practical note — an eighth should always weigh 3.5 grams on the scale. A shop selling short eighths is a sign to find a dispensary that weighs in view of the customer. The 3.5-gram standard is not a suggestion; it is the math.

For customers weighing out purchases at the counter and wondering how those grams line up with the law, NY Cannabis Possession & Use Rules covers the current New York cannabis possession and use rules under the MRTA.

How Much Is a Quarter Ounce of Cannabis (7 Grams)?

A quarter ounce of cannabis is 7 grams, which is exactly two eighths of 3.5 grams each [1]. A quarter fits comfortably in a medium jar and is enough flower for several weeks of moderate sessions, depending on use.

The math is straightforward:

• 1 quarter = 2 eighths
• 1 quarter = 7 grams
• 4 quarters = 1 ounce (28 g)

Most shops discount quarters meaningfully compared with eighths. The savings are smaller than the jump from grams to eighths, but they are real. For moderate-to-regular customers, a quarter is often the sweet spot between price and freshness — large enough that it will not run out in a week, small enough that the bud will not sit long enough to lose aroma.

For customers who care about terpenes, a quarter is a good size to split between two or three strains so you can rotate flavor profiles without committing a full ounce to any one of them. To browse current quarter selections and compare cultivars by weight and price, Whole Flower Flower shows the current whole flower options at Treehouse.

How Much Is a Half Ounce and Ounce of Cannabis (14 g and 28 g)?

A half ounce of cannabis is 14 grams and a full ounce is labeled as 28 grams at retail, although the exact avoirdupois ounce is 28.3495 grams per NIST [4]. Two quarters make a half, and two halves make an ounce.

Key facts about the top of the ladder:

• 1 half ounce = 14 grams (two quarters)
• 1 ounce = 28 grams (eight eighths)
• 1 exact ounce (avoirdupois) = 28.3495 grams [4]
• Most dispensaries cap single transactions at 1 ounce
• Ounces carry the lowest per-gram price on the menu

Half ounce compared to a full ounce:

The half-step is a useful middle ground for daily consumers who move through eighths quickly but do not want a full ounce sitting around. The ounce, by contrast, is mostly a value play — the per-gram savings are noticeable when you compare menu prices.

One thing to keep in mind: a labeled ounce is almost always 28 grams exactly, not the precise 28.3495 grams a scale would show. The 0.35-gram difference is the rounding the industry uses so eight eighths of 3.5 grams each add up cleanly to 28 grams [1].

Ounces show up in lifestyle contexts beyond the scale too. A 2026 survey of 2,556 sports fans found that 85.5% of US fans who used substances at venues reported cannabis, putting ounces and eighths in the everyday context of how people actually consume [7]. If you are picking up gear for those sessions alongside your flower, Treehouse Womens Tank Top is one of the apparel pieces available at Treehouse.

How Many Joints Can You Roll From Each Cannabis Measurement?

Joints per cannabis measurement depend on how heavy you roll. At a standard 1-gram joint, a gram yields one, an eighth yields about 3 to 5, a quarter yields 7 to 10, a half ounce yields 14 to 20, and an ounce yields roughly 28 [1].

Quick yield guide:

• 1 gram = 1 large joint, or 2 to 3 half-gram joints
• 3.5 grams (eighth) = 3 to 5 average joints
• 7 grams (quarter) = 7 to 10 average joints
• 14 grams (half ounce) = 14 to 20 average joints
• 28 grams (ounce) = ~28 large joints, or 50 to 60 half-gram joints [3]

Real-world joint weight is often lower than those self-reported numbers. A controlled study measuring actual cannabis content in joints found the mean weight was about 0.11 to 0.17 grams, well below the 0.5 to 1.0 grams many people assume [3]. Looser rolling habits and the cannabis-to-tobacco ratio in mixed joints both drive that number down. If you tend to roll light, an ounce will go further than the headline counts suggest.

If you do not want to roll at all, multi-packs translate these weights into pre-rolled sessions without owning a grinder. Packs Pre_rolls shows the current selection of multi-pack joints at Treehouse, which takes the rolling math out of the equation entirely.

What Is the Legal Possession Limit for Cannabis in New York?

The legal cannabis possession limit in New York is 3 ounces of flower and 24 grams of concentrate in public for adults 21 and older, under the Marijuana Regulation and Taxation Act (MRTA) administered by the New York State Office of Cannabis Management [5]. That ceiling is three full retail ounces — far above what most customers ever carry.

Practical takeaways for New York customers:

• 3 ounces of flower in public is the legal cap for adults 21 and older [5]
• 24 grams of concentrate in public is the parallel cap
• 3 to 16 ounces is a $150 civil violation, not a criminal charge [6]
• Amounts above 16 ounces can carry misdemeanor or felony charges depending on weight
• Home storage limits are higher than public possession limits under the MRTA

Penalties above the cap are graduated rather than criminal for small overages. Possessing between 3 and 16 ounces is treated as a $150 civil violation under New York law, with no criminal penalty at that level [6].

If you are weighing out purchases at the dispensary and want a strain already broken down for rolling without owning a grinder, Pre Ground Flower shows the current pre-ground flower options at Treehouse, which sit well under the 3-ounce public cap.

What Are the Most Common Cannabis Measurements Questions?

Quick answers:

• An eighth of cannabis is 3.5 grams — one-eighth of a 28-gram retail ounce.
• A quarter ounce equals 7 grams, or two eighths, with a lower per-gram price.
• A half ounce is 14 grams, made of two quarters or four eighths.
• An ounce is labeled as 28 grams at retail; the precise avoirdupois ounce is 28.3495 grams.
• A gram is the smallest unit most dispensaries stock, good for sampling a new strain.

How many grams are in an eighth of cannabis? An eighth of cannabis is 3.5 grams. The name comes from it being one-eighth of a retail ounce, and eight eighths make one full ounce under the standard US retail convention used by dispensaries.

How many grams are in a quarter ounce of cannabis? A quarter ounce of cannabis equals 7 grams. It is twice the size of an eighth and a common purchase size for moderate customers who want a better per-gram price without committing to a full ounce.

How many grams are in a half ounce of cannabis? A half ounce of cannabis equals 14 grams. Two eighths make a quarter, two quarters make a half, and a half ounce is the middle step before moving up to a full ounce at retail.

How many grams are in an ounce of cannabis? An ounce of cannabis is labeled as 28 grams in retail shorthand, although the exact avoirdupois conversion is 28.3495 grams. The 28-gram convention is built from eight eighths of 3.5 grams each.

Is an eighth always 3.5 grams? Yes, an eighth is always 3.5 grams because the math is fixed: one ounce of 28 grams divided by eight equals 3.5 grams. Any dispensary selling less than 3.5 grams as an eighth is short-weighting the customer.

What is the legal possession limit for cannabis in New York? In New York, adults 21 and older may legally possess up to 3 ounces of cannabis flower and up to 24 grams of cannabis concentrate in public, per the Marijuana Regulation and Taxation Act (MRTA).

How many joints can you roll from an ounce of cannabis? A typical 1-gram joint uses one full gram of flower, so a 28-gram ounce can produce roughly 28 large joints, while the same ounce yields closer to 50 to 60 half-gram joints. Real joint weights often run lower.

What is the difference between an ounce and a fluid ounce for cannabis? Cannabis flower is sold by weight in avoirdupois ounces, where 1 ounce equals 28.3495 grams. A fluid ounce measures volume and is not used for flower. The troy ounce used for precious metals is also not used for cannabis.

Sources

1. Leafly — Defines the standard US retail weight ladder: 1 gram, an eighth (3.5 g), a quart
2. StatPearls / National Center for Biotechnology Information — Peer-reviewed clinical reference that distinguishes cannabis from hemp by 0.3% d
3. National Center for Biotechnology Information (PMC) — Empirical study finding that the actual mean weight of cannabis in a typical joi
4. National Institute of Standards and Technology (NIST) — Authoritative source for the exact avoirdupois conversion: 1 ounce = 28.34952312
5. New York State Office of Cannabis Management — Official state source confirming the 3 ounce public possession cap and 24 gram c
6. NORML — Documents New York's graduated possession penalties: under 3 oz is no penalty, 3
7. Journal of Sport and Social Issues (Sage) / Drugs and Alcohol Library — Peer-reviewed survey of 2,556 sports fans finding 85.5% of US fans who used subs

About Treehouse Cannabis

Treehouse Cannabis is an adult-use dispensary serving Rockland, Orange, and Westchester Counties in New York. Stop in to put a scale to the weight and walk through grams, eighths, and everything above with our budtenders — we will match you with flower and pre-rolls to fit the session you actually want.

This article is intended for adults 21 and older. Cannabis is for adults 21 and older. Keep all cannabis products out of the reach of children and pets. Do not drive or operate machinery while under the influence of cannabis. The information in this article is educational and is not medical advice; consult a qualified healthcare provider before using cannabis for any health-related purpose.