What is a Zip of Weed? Ounce Explained (28 Grams)

Cannabis has its own vocabulary, and if you've spent any time around it, you've probably heard people talk about "picking up a zip" or "getting a Z." For newcomers, this language can be confusing. For anyone buying cannabis—whether from a dispensary or elsewhere—understanding weights is genuinely useful for knowing what you're getting and whether you're paying a fair price.

A "zip" is one of the most commonly referenced quantities in cannabis culture. It's an ounce, it's 28 grams, and it's the largest quantity most individual consumers buy at once. This guide explains what a zip is, why it's called that, how much cannabis it actually is, and everything else you need to know about cannabis weights.

Quick Answer

A "zip" is slang for one ounce of cannabis, which weighs 28 grams. The name comes from the fact that an ounce fits perfectly into a standard zip-lock sandwich bag. A zip is the largest standard purchase quantity for most consumers and is at or near the legal possession limit in many states with legal cannabis. Prices vary widely by market and quality, typically ranging from $100 to $300+ in legal markets.

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Table of Contents

• What is a Zip?
• Why Is It Called a Zip?
• How Much Is 28 Grams of Weed?
• Cannabis Weight Breakdown
• How Many Joints, Bowls, or Blunts in a Zip?
• How Much Does a Zip Cost?
• Buying a Zip: What to Know
• Pro Tips
• FAQ

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What is a Zip?

A zip is exactly one ounce of cannabis by weight: 28.3495 grams, conventionally rounded to 28 grams in cannabis transactions.

The ounce is the standard large-quantity measurement in the US cannabis market. Everything in the cannabis weight system is typically measured relative to ounces:

• 1/8 oz (eighth) = 3.5 grams
• 1/4 oz (quarter) = 7 grams
• 1/2 oz (half) = 14 grams
• 1 oz (zip) = 28 grams
• 1 lb (pound) = 16 ounces = 448 grams

A zip sits at the consumer end of this scale—it's the largest quantity that most individual buyers purchase. Commercial quantities (pounds, kilograms) are the domain of wholesale transactions.

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Why Is It Called a Zip?

The origin of the term "zip" is simple and practical: a full ounce of cannabis fits almost perfectly into a standard Ziploc sandwich bag. The name is a direct reference to the zip-lock closure.

This connection between the physical container and the measurement gave rise to the slang. In the legacy cannabis market, before dispensary jars and mylar bags became standard, cannabis was commonly sold and stored in zip-lock bags of various sizes—and an ounce's worth of flower filled a sandwich bag just right.

The term has been part of cannabis culture for decades and has survived into the legal market era even though cannabis is rarely sold in zip-lock bags at dispensaries anymore. Like many pieces of cannabis slang, it persisted through cultural inertia and its use in music and popular culture.

Other slang for an ounce includes: "O," "zone," "Z," "OZ," and regionally specific terms.

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How Much Is 28 Grams of Weed?

For people new to cannabis quantities, 28 grams is a meaningful amount to visualize.

The Physical Size

The actual volume of 28 grams of cannabis flower varies significantly depending on the density of the buds. Dense, well-grown cannabis is heavier for its size than airy or loosely structured flower.

As a rough guide:

• Dense indoor flower: A zip might fill about 3/4 of a standard mason jar (about 3 cups by volume)
• Airy, loosely trimmed flower: The same 28 grams might look like more, filling a full mason jar

This is why buying by weight rather than visual volume matters—a bag that looks full could weigh significantly less than one with denser buds.

The Practical Quantity

For an average consumer who smokes a bowl or joint per day:

• A zip lasts approximately 1-2 months
• For heavier consumers (multiple sessions daily): 2-4 weeks
• For occasional users (weekends only): 3-6 months

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Cannabis Weight Breakdown

Understanding the full weight scale helps you understand pricing and what you're buying at each level:

Gram (1g)

The smallest standard unit. Enough for 1-2 average joints or 2-4 average bowls. This is what dispensary pre-rolls typically contain.

Average price: $10-$20

Eighth (3.5g - "an eighth")

One-eighth of an ounce. The most popular purchase quantity at dispensaries. Enough for most consumers to last a week to a few weeks depending on usage.

Average price: $25-$60

Quarter (7g - "a quarter")

One-quarter of an ounce. A good quantity for regular consumers who've found a strain they like and want to stock up.

Average price: $50-$100

Half Ounce (14g - "a half")

Half of a zip. Usually where per-gram pricing starts dropping notably.

Average price: $80-$160

Ounce / Zip (28g)

One full ounce. Typically the maximum per-transaction limit at dispensaries in many states. Where per-gram pricing is at its lowest for consumer quantities.

Average price: $100-$300+

Pound (448g - "a zip of zips" or "16 zips")

16 ounces. This is wholesale territory—typically for commercial purposes or licensed operations. Retail consumers rarely purchase at this scale.

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How Many Joints, Bowls, or Blunts in a Zip?

This depends on your consumption habits, but here are realistic estimates:

Joints

An average joint contains 0.5-0.75 grams of cannabis. Premium joints might contain up to 1 gram.

• At 0.5g per joint: 56 joints per zip
• At 0.75g per joint: 37 joints per zip
• At 1g per joint: 28 joints per zip

Bowls

A standard pipe bowl holds about 0.3-0.5 grams.

• At 0.35g per bowl: 80 bowls per zip
• At 0.5g per bowl: 56 bowls per zip

Blunts

Blunts are notably heavier—typically 1-2 grams per blunt, sometimes more.

• At 1g per blunt: 28 blunts per zip
• At 1.5g per blunt: 18-19 blunts per zip

Bong Bowls

Similar to pipe bowls—typically 0.3-0.5g per pack.

• At 0.4g per bowl: 70 bong bowls per zip

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How Much Does a Zip Cost?

Cannabis pricing varies enormously by state, market, product quality, and whether you're in a legal or non-legal market. Here's a realistic overview:

Legal Dispensary Prices (US)

These prices reflect general market ranges in legal states as of 2026:

States with high cannabis taxes (California, Illinois) tend to have higher prices. States with more mature markets and greater competition (Colorado, Oregon) often have lower prices.

Price Per Gram Comparison

One of the main reasons to buy a zip rather than smaller quantities is per-gram cost savings:

A zip typically saves you 30-50% compared to buying individual grams.

Legal Possession Limits

Before buying a zip, know your state's possession limits:

Most adult-use states allow possession of 1 ounce (28g) or more for personal use. Some states allow more:

• Colorado: 1 oz (28g)
• California: 1 oz (28g)
• Washington: 1 oz (28g)
• Oregon: 1 oz in public, 8 oz at home
• Alaska: 1 oz in public, 4 oz at home

Check your specific state's limits—carrying more than the legal amount can still result in charges even in legal states.

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Buying a Zip: What to Know

At a Dispensary

Dispensaries sell by weight and verify measurements. Legal cannabis from a licensed dispensary is weighed on calibrated scales and labeled with exact weight. You can typically verify this with your own scale after purchase.

Verifying Weight

If you purchase cannabis and want to verify weight, a digital pocket scale is the tool for the job. Look for scales with:

• Precision to 0.01 grams
• Capacity of at least 100g
• Tare function (to zero out a container)

What to Look For in a Zip

When evaluating whether a zip is worth the price:

• Aroma: Should be noticeable and characteristic of the strain
• Appearance: Dense buds, visible trichomes, proper trim
• Moisture: Not bone dry (which means degraded terpenes) and not too wet (which means improper cure and potential mold)
• Lab testing: Dispensary products will have test results—check THCA/THC percentage and terpene content

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Pro Tips

1. Buy a digital scale if you purchase frequently—even from legal dispensaries, verifying weight is worthwhile

2. Price per gram math: Divide the total price by 28 to get per-gram cost and compare across options

3. Storage matters at scale: A zip needs proper storage in an airtight container to maintain freshness over weeks. Mason jars or dedicated cannabis storage containers work well

4. Stock one strain at a time: If you're buying a zip to save money, make sure you actually like the strain before committing to 28 grams of it

5. Legal possession limits matter: Carrying more than your state's limit, even on legally purchased cannabis, can be a legal issue

6. Don't conflate density with quality: Dense buds don't automatically mean better cannabis—look at terpene profiles and lab data

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FAQ

Why is it called a zip of weed?

A zip gets its name from the zip-lock sandwich bag—an ounce of cannabis fits almost perfectly into a standard zip-lock bag. The term comes from the legacy cannabis market where zip-lock bags were standard packaging, and has persisted into the legal era through cultural usage.

How many grams is a zip?

A zip is 28 grams (technically 28.35 grams, which is one exact ounce, but conventionally rounded to 28 in cannabis transactions).

How long does a zip of weed last?

This depends entirely on consumption frequency. For a once-daily bowl smoker (about 0.3-0.5g per day), a zip lasts 2-3 months. For a heavy daily user (1-2g+ per day), a zip might last 2-4 weeks. For occasional weekend use, a zip could last 3-6 months.

Is buying a zip better value than buying eighths?

Usually yes, from a per-gram cost perspective. Buying a zip typically costs 30-50% less per gram than buying individual grams. The tradeoff is committing to a larger quantity, so make sure you like the strain before buying a full ounce.

How much does a zip cost?

Legal dispensary prices vary by state and quality tier, but generally range from $100-$300+ for an ounce. Budget or value-tier cannabis is at the lower end; premium and exotic tiers at the higher end. Cannabis taxes vary significantly by state, which affects prices.

What other words mean the same as zip?

Other terms for an ounce of cannabis include: "O," "zone," "Z," "OZ," "lid" (older term, less common today), and "quarter pound" refers to 4 ounces. Regionally, different slang may be more common.

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Conclusion

A zip is simply one ounce—28 grams—of cannabis. The slang has roots in a practical reality (the zip-lock bag) and has survived decades of cultural change to remain one of the most commonly understood quantity references in cannabis culture.

For regular consumers, buying at zip quantities offers meaningful per-gram cost savings compared to buying eighths or grams. The keys are finding strains you actually want 28 grams of, storing them properly, and understanding your state's possession laws.

For more on cannabis weights and measurements, or for help verifying what you're buying, a reliable digital scale is your best tool.