Questions
What Is an 8th of an Ounce in Grams? A Quick Guide
An eighth of an ounce is exactly 3.5 grams. Since one ounce equals 28.3495 grams, dividing by eight gives you 3.5437 grams, which is rounded to 3.5 grams for cannabis. This is the standard measurement used at dispensaries like Cannavine.
How to Convert Ounces to Grams Yourself
To convert ounces to grams, multiply the number of ounces by 28.3495. For quick mental math, most people round to 28 grams per ounce. This table shows common conversions.
| Ounces | Grams (rounded) |
|---|---|
| 1 | 28.35 |
| 1/8 | 3.54 |
| 1/4 | 7.09 |
| 1/2 | 14.17 |
| 1 | 28.35 |
Prefer a different unit? Try our formulas: for grams to ounces, divide by 28.35. Our team at Cannavine Cannabis Dispensary near Soma can help you weigh your purchase before you leave.
What Is an Eighth of an Ounce in Grams?
An eighth of an ounce is a common unit for purchasing cannabis flower. One full ounce equals 28.3495 grams, so an eighth is that amount divided by 8.
| Unit | Grams |
|---|---|
| 1/8 ounce | 3.5 grams |
| 1 ounce | 28.35 grams |
In practice, most dispensaries and customers round to 3.5 grams for simplicity. For other cannabis weights, see our guide on how many grams in a quarter of weed.
How Many Grams Are in a Full Ounce?
A full ounce equals exactly 28.3495 grams. This base conversion is the key to understanding all cannabis weight units, from eighths to pounds. Below is a quick reference.
| Unit | Grams |
|---|---|
| 1 ounce | 28.35 g |
| 1/2 ounce | 14.17 g |
| 1/4 ounce | 7.09 g |
| 1/8 ounce | 3.54 g |
For half-ounce specifics, see how many grams is a half ounce. If you're verifying a purchase, always check with your dispensary — some round to 28 grams even.
How Many Eighths Are in an Ounce?
There are exactly 8 eighths in one ounce. Since an eighth is 1/8 of an ounce, you simply multiply 3.5 grams by 8 to get 28 grams (or 28.35 to be exact). This is basic math, but it's helpful when you're budgeting or splitting with friends.
| Amount | Number of Eighths | Total Grams |
|---|---|---|
| 1/8 oz | 1 | 3.5 g |
| 1/4 oz | 2 | 7 g |
| 1/2 oz | 4 | 14 g |
| 1 oz | 8 | 28.35 g |
| 1/4 pound (QP) | 32 | 113.4 g |
If you're buying in bulk, you'll often hear terms like 'QP' (quarter pound), which equals 4 ounces or 32 eighths. At Cannavine, we can break down any amount for you—just ask.
Directions to our dispensary near SoMa from McKesson Plaza
Start at McKesson Plaza and head to Cannavine Cannabis Dispensary (San Francisco) at 70 2nd St, San Francisco, CA 94105.
What Does an Eighth of Cannabis Look Like?
An eighth of cannabis is about the size of a small handful—roughly enough to roll three to four average joints or pack a few bowls. It typically fits in a small glass jar or a standard sandwich baggie.
A good fit if…
- You're a casual user—an eighth can last a week or more if you only smoke on weekends.
- You want variety—you can buy two or three different eighths to sample strains without committing to a larger amount.
- You're trying a new strain—it's enough to test effects without overspending.
Consider another option if…
- You're a daily smoker—a quarter or half ounce might be more cost-effective.
- You're on a tight budget—a single gram might be enough for a trial.
At our San Francisco dispensary, you can see and handle the product before you decide. Our budtenders can show you exactly what 3.5 grams looks like in person.
How Much Does an Eighth Cost at a Dispensary?
Eighth prices at dispensaries vary widely based on quality, strain, and local market. Below are factors that drive cost — remember, prices change often and differ by location.
| Factor | Why It Matters | Typical Range (general) |
|---|---|---|
| Strain rarity | Limited drops or craft grows cost more. | varies; low-end to premium |
| THC potency | Higher THC percentage often increases price. | varies; standard to top-shelf |
| Location | Urban dispensaries may have different overhead. | varies widely |
| Sale or bulk deals | Buying multiple eighths can lower per-unit cost. | ask for bundle pricing |
For a deeper look, visit is $30 for an eighth good or our price guide where to buy $30 eighths in SF. Prices at Cannavine are updated daily — check our menu for current specials.
Is an Eighth the Same in Troy Ounces?
No, a troy ounce is different from a standard ounce. A troy ounce weighs 31.1035 grams, so an eighth of a troy ounce would be about 3.8879 grams. However, cannabis is always measured using the standard (avoirdupois) ounce, not troy.
| Type | Grams per Ounce | Grams per Eighth |
|---|---|---|
| Standard (avoirdupois) | 28.3495 g | 3.5437 g (rounded to 3.5) |
| Troy | 31.1035 g | 3.8879 g |
If you're buying cannabis, always assume the standard ounce. Troy ounces are used for precious metals like gold and silver, not for flower. So when you buy an eighth at a dispensary, you're getting 3.5 grams.
Sources
Frequently asked questions
How many grams are exactly in an ounce?
One ounce is exactly 28.3495 grams. This is the standard conversion factor used in the U.S. for cannabis and most other products. For quick math, most people round to 28.35 grams.
How much is 6 grams?
Six grams is a bit less than a quarter ounce (which is 7 grams). It's not a standard cannabis measurement, but you could ask a dispensary to weigh out 6 grams for you. It's roughly enough for 5 to 6 joints.
How many eighths are in 1 oz?
There are exactly 8 eighths in one ounce. Since an eighth is 3.5 grams, 8 eighths equal 28 grams (or 28.35 to be exact). This is a common question when people are budgeting or splitting a purchase.
How many grams are in a QP?
A QP, or quarter pound, equals 113.4 grams. That's 4 ounces, and since each ounce is 28.35 grams, you multiply 4 × 28.35 = 113.4. A QP is a bulk purchase, often used by heavy consumers or for sharing.
Is $45 for an eighth good?
In San Francisco, $45 for an eighth is within the average range, especially for premium or craft cannabis. Prices can vary from $25 to $60, so $45 is reasonable if the quality is high. Check for deals or ask your budtender for recommendations.
Also asked as
- How many grams are in an eighth?
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- How much is 1/8 ounce in grams?