Cannabis is one of the few products where Americans casually mix metric and imperial measurements in the same sentence. People buy a gram, then an eighth, then a quarter, and talk about a zip or a QP. If you are new, the terms can sound like a code. If you grow at home, knowing them helps you understand your harvest, store it properly and stay within legal possession limits. This guide explains the common slang for amounts, shows the math behind it and covers how growers use these numbers. It is for adults 21 and older.

Why the measurements are mixed

Small amounts are usually sold by the gram, a metric unit. Larger amounts are usually described as fractions of an ounce, an imperial unit. The mix came from the underground market, where scales were often metric but larger deals were still discussed in ounces. Legal stores have kept the same names because customers know them.

One ounce equals about 28.35 grams. In everyday talk and most store menus, an ounce is rounded to 28 grams, and the fractions are based on that rounded number.

The common amounts

Slang	Fraction	Approximate grams
Gram or G	Base unit	1
Eighth	One eighth ounce	3.5
Quarter or Q	One quarter ounce	7
Half or half O	One half ounce	14
Ounce, O, zip or zone	One ounce	28
QP	Quarter pound	about 113
HP	Half pound	about 227
Pound or P	One pound	about 454

Explaining the main terms

Gram. The smallest common unit. Often enough to roll one or two joints, depending on size.

Eighth. An eighth of an ounce, or about 3.5 grams. This is the most common package size for flower in legal stores.

Quarter. A quarter ounce, about 7 grams. Sometimes called a Q or a quad.

Half. Half an ounce, about 14 grams.

Ounce. About 28 grams. Common nicknames include O, zip and zone. Zip is said to come from the zip top bag an ounce often came in.

QP. A quarter pound, four ounces or about 113 grams. You hear this more from growers talking about harvests than from casual buyers.

Dime and dub. Older slang that refers to the price of an amount, such as ten or twenty dollars worth, rather than a fixed weight. Since prices vary, these terms do not map cleanly to grams.

Why growers care about these numbers

Home growers usually measure harvests in grams or ounces of dried flower. Knowing the slang helps you understand forum posts and grow reports. When someone says they pulled a QP from a single plant, you know that means about four ounces dried.

More importantly, many states set home possession limits in ounces. A harvest from even a few healthy plants can exceed those limits. Some states let you keep everything your legal plants produce at home, while others set a hard cap. Our guide to the legal requirements for growing weed plants in your state explains the general picture, and you should always check your state rules before harvest.

Wet weight versus dry weight

Fresh buds lose most of their weight as they dry, often around 70 to 80 percent. That means a pound of fresh flower might end up as only a few ounces once dried and cured. When growers or laws talk about amounts, they almost always mean dried flower. Do not panic at a big wet weight, and do not overestimate your final harvest either.

Weighing at home

A simple digital scale that reads to a tenth of a gram is enough for most home growers. Calibrate it now and then with a known weight. Weigh your flower after drying and again after curing to track how much moisture it loses. Write the numbers on jar labels along with the strain and harvest date.

Storing by amount

Glass jars make storage easy. Many growers use small jars for eighths and quarters they plan to use soon and larger jars for longer cures. Fill jars about three quarters full so buds have room to breathe during curing. Keep them in a cool, dark place, locked away from children, pets and guests.

Tips for buying in stores

Legal stores label packages by weight, so you rarely need slang at the counter. Still, it helps to know that an eighth is about 3.5 grams so you can compare prices across package sizes. Bigger sizes often cost less per gram, but only buy what you will use while it is fresh.

Metric in other countries

Outside the United States, most countries use grams for everything, so you will not hear eighths or zips as often. A grower reading a European forum might see 100 grams where an American would say a little under a QP. Knowing both systems makes it easier to compare grow reports from around the world.

Common mistakes with amounts

The most common mistake is mixing rounded and exact numbers. An exact ounce is 28.35 grams, so an exact eighth is about 3.54 grams. Legal stores usually sell 3.5 gram eighths, which is perfectly normal. Another mistake is weighing buds before they finish drying. Buds keep losing weight until the cure stabilizes, so a jar weighed too early will seem lighter a week later. A third mistake is forgetting that jars, bags and containers have weight of their own. Use the tare button on your scale to zero out the container first.

Tracking your harvest totals

Keep a simple log for each plant with the dry weight at the end of drying and the weight after two weeks of curing. Add the totals for all plants so you know where you stand against any home possession limit. If your total gets close to a limit, plan ahead with your state rules in mind.

Sharing with other adults

Some states allow adults to gift small amounts to other adults without payment, and others do not. Rules on gifting are often written in ounces too. Check the exact rule before you share any of your harvest.

Enjoy cannabis culture responsibly

Cannabis is only legal for adults in some states, and the rules on possession, public use and home growing change from place to place. Kind Seed Co sells only to adults 21 and older, and nothing here is an invitation to break the law where you live. If you want to know what is allowed in your state, start with our guide to the legal requirements for growing weed plants in your state. Never drive after using cannabis, keep it away from kids and pets, and respect anyone who chooses not to partake. This article is general information about culture and history. It is not legal advice and it is not medical advice.

Frequently asked questions

How many grams are in an eighth?

About 3.5 grams, based on rounding an ounce to 28 grams.

What is a zip?

A zip is slang for an ounce, about 28 grams. The name is often said to come from zip top bags.

What is a QP?

A QP is a quarter pound, which is four ounces or about 113 grams.

Do possession limits use dry weight?

In most states, yes. Limits are usually written for dried, usable flower. Check your state rules for the details.

Final thoughts

Weed slang for amounts is mostly simple math built on a rounded 28 gram ounce. Learn the eighth, quarter, half and ounce, know what a QP means in grow reports and always check your harvest against your state’s possession rules.

Ready to start

Browse the full range in the Kind Seed Co shop or go straight to kindseed.com. Kind Seed Co sells only to adults 21 and older. Always follow the cannabis laws where you live.