Cannabis Measurements Explained: Grams, Eighths, Ounces and Pounds

Cannabis measurements follow a simple ladder: a gram is the smallest common unit, an eighth is 3.5 grams, a quarter is 7 grams, a half is 14 grams, and an ounce is 28 grams. Above that, shoppers talk in quarter pounds, half pounds and full pounds, which are just multiples of ounces. This guide walks through every standard weight, what each size is actually good for, and how price per gram changes as you move up the chart, so you can buy THCA flower with confidence.

Why Cannabis Measurements Mix Metric and Imperial

Flower is sold by weight, and the US market uses a hybrid system. Small amounts are quoted in grams, while larger amounts are quoted as fractions of an ounce. That is why you will see "3.5 g" and "eighth" used for the same product.

The reason is practical. An ounce is technically 28.35 grams, but the industry rounds it to 28 grams for clean math. Every fraction below the ounce then rounds too: an eighth becomes 3.5 grams instead of 3.54. Once you memorize 28 as the anchor number, every other weight falls into place.

If you are brand new to the category, start with our beginner's guide to THCA flower before you worry about weights. It explains what you are buying and how it differs from traditional dispensary cannabis.

The Complete Cannabis Weight Chart

Here is every standard size you will encounter, from a single gram to a full pound. Rounded industry figures are shown alongside the precise conversion so you can see where the shortcuts live.

Name	Common Nickname	Industry Weight	Exact Weight	Fraction of an Ounce
Gram	G, dub (in some regions)	1 g	1 g	1/28
Eighth	Eighth, 3.5, slice	3.5 g	3.54 g	1/8
Quarter	Quad, Q	7 g	7.09 g	1/4
Half Ounce	Half, half-O	14 g	14.17 g	1/2
Ounce	O, zip	28 g	28.35 g	1
Quarter Pound	QP	112 g	113.4 g	4
Half Pound	HP	224 g	226.8 g	8
Pound	P, pack, elbow	448 g	453.6 g	16

Notice the gap between industry weight and exact weight grows as you climb. A pound sold at 448 grams is about 5.6 grams lighter than a true 453.6 gram pound. Reputable sellers state the gram weight on the label, so you always know which number you are getting.

What Each Size Is Good For

The right amount depends on how often you use flower, how many strains you want to rotate, and how much you are willing to commit to a single cultivar before you have tried it. Here is how each tier tends to fit real life.

1 Gram: The Sample

A gram is roughly one to two pre-rolls or a few bowls. It is the right size for trying a brand-new strain without commitment. Many shops skip single grams on premium flower because the packaging and labor cost more than the product, which is why 3.5 grams is usually the smallest size for top-shelf buds.

3.5 Grams: The Eighth

The eighth is the most popular size in cannabis for good reason. It is enough for a week or two of occasional sessions, small enough to stay fresh, and the standard unit for comparing prices between brands. If you want to taste several strains, buying two or three eighths beats buying one larger bag. Elevana's flower lineup starts at 3.5 grams, so you can sample strains like Blue Dream or Gelato 41 one eighth at a time.

7 Grams: The Quarter

A quarter is where price per gram starts to drop noticeably. It suits regular users who already know they like a strain and want a two to three week supply. It is also a smart size for rolling your own joints, since you have enough material to grind without running out mid-session.

14 Grams: The Half Ounce

Half ounces appeal to daily users and to households where more than one adult partakes. You are buying in bulk at this point, so storage matters. A proper airtight jar kept away from light will protect terpenes for months. Our guide on how to store THCA flower covers humidity packs, jar sizes and what to avoid.

28 Grams: The Ounce

The ounce is the classic bulk buy for an individual. It is often the largest amount a single adult can legally possess in many regulated markets, which is part of why it became the benchmark unit. For hemp-derived THCA flower, an ounce is the sweet spot for shoppers who have settled on a favorite and want the best everyday value.

Quarter Pound, Half Pound and Pound

These sizes are for serious bulk buyers: people stocking up for months, splitting an order with friends, or small businesses. Price per gram is lowest here, but freshness becomes a real consideration. If you are buying a pound, plan to divide it into smaller sealed jars immediately. Elevana carries flower all the way up to a full pound, so bulk buyers can get the same strain in one consistent batch.

Price Per Gram: How the Math Works

Flower almost always gets cheaper per gram as the package gets bigger. This is not a trick. Packaging, labeling, lab testing and handling cost roughly the same whether a bag holds 3.5 grams or 28 grams, so those fixed costs spread thinner on larger sizes.

To compare offers, divide the total price by the gram weight. A hypothetical eighth at $35 works out to $10 per gram. A quarter at $60 is about $8.57 per gram. A half at $100 is about $7.14 per gram, and an ounce at $180 lands near $6.43 per gram. The numbers will differ by brand, but the shape of the curve is consistent.

Two rules of thumb help. First, the biggest percentage savings usually happens between the eighth and the quarter, then again between the half and the ounce. Second, bulk only saves money if you finish it while it is still fresh. A cheap ounce that goes stale is more expensive than two eighths you enjoyed.

Keep in mind that quality tiers change the math too. Indoor top-shelf flower costs more per gram than greenhouse or outdoor product at every size. Growing method, cure quality and trim all factor into what you are paying for.

Cannabis Measurements Beyond Flower

Weight terms carry over to other product types, but the scale changes. Concentrates like badder and diamonds are typically sold in 1 gram or 0.5 gram jars because they are far more potent by weight than flower. A gram of concentrate can last a casual user as long as an eighth of flower. If you are curious about that category, our guide to THCA concentrates breaks down the textures.

Pre-rolls are labeled by the flower weight inside, commonly 0.5 g, 0.75 g or 1 g for standard joints and 1.5 g to 2 g or more for infused options and hash holes. Gummies skip weight entirely and are measured in milligrams of cannabinoid per piece.

How to Verify You Got the Right Weight

Trust but verify. A basic digital kitchen scale that reads to 0.1 gram costs little and settles any doubt. Weigh the flower itself, not the jar or bag, and remember that flower loses a small amount of weight as it dries. Legitimate sellers often pack slightly over the stated weight to account for this.

Also check the label and lab report. A certificate of analysis lists cannabinoid percentages, and the product label should state net weight in grams. If either is missing, that is a signal to shop elsewhere. Learn what to look for in our article on how to read a cannabis COA.

Choosing Your Size as a THCA Shopper

Hemp-derived THCA flower follows the same cannabis measurements as any other flower, but a few things are specific to buying it online. You must be 21 or older, and you should check your local laws, since some states restrict THCA products even though they are federally compliant hemp.

Because you cannot smell the jar before you buy, start with an eighth of any new strain. Once you find one you love, step up to a quarter or half to lower your cost per gram. Daily users who have locked in a favorite can move to ounces or larger with confidence, as long as storage is handled well.

A simple progression works for most people: sample at 3.5 grams, commit at 7 or 14 grams, stock up at 28 grams and above.

Frequently Asked Questions

How many grams are in an eighth of cannabis?

An eighth is 3.5 grams. The exact conversion of one eighth of an ounce is 3.54 grams, but the cannabis industry rounds to 3.5 for simplicity. It is the most common retail size for flower.

Why is an ounce 28 grams instead of 28.35?

The standard avoirdupois ounce is 28.35 grams, but cannabis measurements use 28 as a convention because it divides cleanly into halves, quarters and eighths. Most labels and price lists use the rounded number, so an "ounce" of flower typically means 28 grams.

How many eighths are in an ounce?

There are eight eighths in an ounce, which is where the name comes from. In grams, that is eight packages of 3.5 grams for a total of 28 grams. Buying a full ounce is almost always cheaper per gram than buying eight separate eighths.

How many ounces are in a pound of cannabis?

A pound contains 16 ounces, or 448 grams by industry convention. A quarter pound is 4 ounces (112 grams) and a half pound is 8 ounces (224 grams). These are bulk sizes meant for long-term supply or splitting among several adults.

Is it cheaper to buy cannabis in larger quantities?

Usually, yes. Price per gram typically drops at each step up the chart because fixed costs like packaging and testing are spread across more product. The savings only pay off if you can store the flower properly and use it before it loses freshness.

What size should a first-time THCA buyer choose?

An eighth, or 3.5 grams, is the ideal starting point. It is enough to get a real sense of a strain's aroma, flavor and effects without a large commitment. Once you know what you like, larger sizes offer better value.

Find Your Size at Elevana

Whether you want a 3.5 gram eighth to explore a new strain or a full pound of a proven favorite, Elevana offers premium THCA flower across every standard weight, along with infused pre-rolls, concentrates and gummies. Browse the full Elevana collection and pick the size that fits how you actually use flower.

This article is for informational purposes only and is not medical or legal advice. Hemp-derived THCA products contain less than 0.3% delta-9 THC by dry weight. THCA converts to THC when heated. Keep all products away from children and pets. Do not drive or operate machinery after use.