An eighth is 3.5 g. Here are the common sizes from 1 g to 28 g, Ontario's 30 g limit, and a simple way to compare price per gram on any product.
An eighth is 3.5 grams of dried cannabis, one-eighth of an ounce. What an eighth costs in Toronto depends on the product, so the reliable way to compare is price per gram: divide the price by the number of grams in the package.
Below are the common sizes, the legal limit that caps them, and worked examples for flower, pre-rolls, vapes and edibles. All prices in the examples are round illustrative numbers to show the maths. They are not our prices or anyone else's. For current prices, check our live menu.
Common sizes, from a gram to an ounce
Dried flower is usually sold in a handful of standard weights. The names come from fractions of an ounce:
| Size | Grams | Fraction of an ounce |
|---|---|---|
| A gram | 1 g | about 1/28 |
| An eighth | 3.5 g | 1/8 |
| A quarter | 7 g | 1/4 |
| A half | 14 g | 1/2 |
| An ounce | 28 g | 1 |
An imperial ounce is about 28.35 g, so the retail "ounce" is rounded to 28 g, and the smaller sizes are rounded fractions of that.
Package sizes vary by producer, so always check the net weight on the label. Health Canada's guide on how to read a cannabis label says labels show the net weight or volume per package, and per unit where that applies.
The 30 g limit sets the ceiling
The largest size you will find is 28 g for a reason. The AGCO's page on what customers can expect at authorized stores says customers can buy up to 30 grams (about one ounce) of dried cannabis, or equivalent, at one time. Ontario's cannabis laws page sets the same 30 g maximum for what you can have in public.
The federal Cannabis Regulations also say a package's immediate container must not contain more than the equivalent of 30 g of dried cannabis.
"Equivalent" matters when you buy more than one type of product. Under Schedule 3 of the Cannabis Act, 0.25 g of cannabis concentrate counts as 1 g of dried cannabis, so a 1 g vape cartridge counts as 4 g. An ounce of flower plus a 1 g cartridge would be 32 g equivalent, which is over the limit for one purchase. Our guide to possession limits has the full conversion table.
How to work out price per gram
The formula is simple:
Example (illustrative prices only):
| Package | Example price | Price per gram |
|---|---|---|
| 3.5 g | $35.00 | $35.00 / 3.5 = $10.00 |
| 7 g | $63.00 | $63.00 / 7 = $9.00 |
| 28 g | $196.00 | $196.00 / 28 = $7.00 |
In this made-up example the larger size works out cheaper per gram. Real products do not always follow that pattern, so run the numbers on the actual products you are comparing. Also compare like with like: two eighths with different Total THC, packaging dates or formats are not the same product at a different price.
Pre-rolls: count the units
Pre-roll labels show the number of units and the weight of each. Multiply to get the total grams, then divide.
Example (illustrative): a pack of 3 pre-rolls at 0.5 g each holds 1.5 g. At an example price of $15.00, that is $15.00 / 1.5 = $10.00 per gram. A pack of 10 at 0.35 g each holds 3.5 g, the same as an eighth. Our pre-roll guide covers the formats.
Vapes and concentrates: per gram of extract
Cartridges, disposables and concentrates are sold by the gram too, often in 0.5 g and 1 g sizes. The same formula applies.
Example (illustrative): a 0.5 g cartridge at $30.00 is $60.00 per gram. A 1 g cartridge at $50.00 is $50.00 per gram.
You can go one step further and compare the cost of the THC itself. Multiply Total THC (mg/g) by the net weight to get total mg, then divide the price by that number.
Example (illustrative): a 1 g cartridge labelled Total THC 800 mg/g holds up to 800 mg. At $50.00, that is about $0.06 per mg. See our vape guide for the hardware differences.
Edibles and beverages: per mg, not per gram
Price per gram does not help with edibles, because the weight is mostly food. Compare by price per mg of Total THC instead. The Cannabis Regulations cap edible cannabis at 10 mg of THC per immediate container.
Example (illustrative): a 10 mg package at $5.00 is $0.50 per mg. A package of two 5 mg pieces at the same price is also $0.50 per mg. The edibles guide explains per-unit and per-package labels.
Member price and regular price
At Sugar Beach Cannabis, every product shows a regular price and a lower member price, so you can run the per-gram maths on whichever applies to you.
A quick way to compare on your phone:
- Open the live menu and pick two or three products in the same category.
- Note the price (regular or member) and the net weight of each.
- Divide price by grams, or by mg of THC for edibles.
- Check Total THC, Total CBD and the packaging date before you decide.
Then order online and pick up in store. Our guide to order online, pick up in store walks through it.
Size is not the only thing to compare
A bigger package can lower the price per gram, but it is still worth buying what you will actually use. Check the packaging date on the label, follow the recommended storage conditions, and keep every product in its original child-resistant packaging, locked away from children and pets. Our storage guide covers this.
Visit Sugar Beach Cannabis
Sugar Beach Cannabis is at 192 Queens Quay East, Unit A5, Toronto, beside Sherbourne Common on the waterfront. Browse the live menu for current regular and member prices, order online and pick up in store, or walk in. We are open 10 a.m. to 10 p.m., 7 days a week (hours can change on holidays, so call ahead). 19+ with government photo ID. Contact us with any questions, or read more about the store.
Frequently asked questions
How many grams is an eighth?
An eighth is 3.5 grams, one-eighth of an ounce. A quarter is 7 g, a half is 14 g and an ounce is sold as 28 g. Always check the net weight on the label, because package sizes vary by producer.
How do I work out price per gram?
Divide the package price by the number of grams. For example, an illustrative price of $35.00 for 3.5 g is $10.00 per gram. For pre-rolls, multiply the number of units by the weight of each first. For edibles, compare price per mg of THC instead.
Can I buy an ounce of cannabis in Ontario?
Yes. The AGCO says customers at authorized stores can buy up to 30 grams of dried cannabis, or the equivalent, at one time, and an ounce is sold as 28 g. Other products count toward the same 30 g equivalent, so an ounce plus a vape cartridge would be over the limit.
Is a bigger size always cheaper per gram?
Often, but not always. Work out the price per gram for each package you are comparing, and compare products with similar Total THC, format and packaging date.
Does Sugar Beach Cannabis have member pricing?
Every product at Sugar Beach Cannabis shows a regular price and a lower member price.
This article is general information about cannabis rules and products in Ontario, not legal or medical advice. Rules change: check the official sources linked above. Cannabis is for adults 19+. Never drive impaired.
Sources
- Authorized Cannabis Retail Stores: What Customers can Expect (AGCO)
- Cannabis laws (Government of Ontario)
- Buying recreational cannabis (Government of Ontario)
- Cannabis Act, Schedule 3: Equivalent Amounts
- Cannabis Regulations (SOR/2018-144), Justice Laws Website
- How to read and understand a cannabis product label (Health Canada)
- Cannabis: lower your risks (Health Canada)
