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Cannabis Weights Explained: Gram to Ounce | Johannesburg

By Green Vault Editorial Team · Published 2026-10-27

What Cannabis Weights Actually Mean

When you browse a cannabis menu for the first time, the terminology can feel unfamiliar. Grams, eighths, quarters — these are all standard units of weight drawn from the imperial system, applied globally to cannabis flower. Understanding them helps you budget correctly, avoid overpaying, and choose the right quantity for your needs.

All cannabis flower is measured in grams. The larger the quantity, the lower the per-gram cost tends to be — though this depends on the product and quality tier. Here is a straightforward breakdown:

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The Gram and 2g: Start Here If You're New

A single gram is the entry point for most cannabis buyers. It is enough for roughly two to three sessions depending on your consumption method, and it lets you assess a strain's aroma, flavour profile, and effect before committing to more.

A 2g purchase strikes a balance — more than a taster, less than a full commitment. If you are exploring a new Indica flower like Biscotti (27% THC) or a Hybrid like Lemon Cherry Gelato (32% THC), starting at 1g or 2g is a sensible, cost-controlled approach. Some users report that high-THC strains can feel intense at first, so buying small initially is genuinely good advice.

For buyers in Sandton or Rosebank ordering through Green Vault, a 1g or 2g flower order can arrive the same day — useful if you want to evaluate a strain without a large upfront spend.

The Eighth (3.5g): The Most Popular Buy

The eighth is the most widely purchased cannabis weight globally, and for good reason. It represents enough supply for a week or more of moderate use, offers better per-gram value than a single gram, and is easy to store discreetly at home.

If you have tried a strain once and enjoyed it, moving to an eighth is the natural next step. Buyers across Fourways, Midrand, and Randburg regularly find this the sweet spot between value and variety — allowing them to rotate between strains without over-committing to one.

An eighth of a high-quality Hybrid flower like UK Cheese (25% THC) or a Sativa-dominant option like Tangie Bomb (16% THC) gives you meaningful time with a strain to understand how it works for you personally.

Quarter, Half-Ounce and Ounce: Bulk Buying Explained

Once you know which strains suit you, larger quantities make financial sense. A quarter (7g) is ideal for consistent regular users. A half-ounce (14g) suits frequent consumers who have a clear preference. A full ounce (28g) is the largest standard unit and typically offers the best per-gram value on any menu.

Before purchasing larger quantities, be aware of the South African legal context. The Constitutional Court's 2018 ruling and the Cannabis for Private Purposes Act 2024 decriminalised private adult use and cultivation, but quantities and specific regulations continue to evolve. Always verify the current legal position yourself before purchasing any quantity. This content is intended for adults 18 and older only.

Storing larger quantities correctly also matters — cool, dark, airtight containers help preserve freshness, potency, and terpene profiles.

How Weights Apply to Other Product Categories

Weights are primarily relevant to flower, but it helps to understand how other product formats relate:

• Pre-rolls are typically sold as single 1g rolls. Green Vault's Banana Kush Pre-Roll (Indica, 21% THC) and Ghost Train Haze Pre-Roll (Sativa, 25% THC) are good examples — convenient, pre-measured, no prep needed.
• Vapes are sold by liquid volume, not dry weight. The Bhang Bar 2g Liquid Diamond Vapes (available in Sativa, Indica, and Hybrid options at R1,250) contain 2ml of concentrate, which is a high-volume cartridge by market standards.
• Edibles and drinks are dosed by milligrams of THC — for example, the Zativa Mojito THC Mocktail contains 30mg THC in 250ml. Weight is irrelevant here; dosage per serving matters most.
• CBD and oil products are similarly measured in mg of cannabinoid content per ml or per serving.

Browse our full store to see current stock across all categories.

THC and CBD Content: What the Percentages Mean

Weight tells you how much product you have. THC percentage tells you how potent it is. These are two separate considerations that together determine value.

A 1g of flower at 32% THC (like Lemon Cherry Gelato) is significantly more potent than 1g at 16% THC. For newer users, lower THC options or CBD-forward products may be more comfortable starting points. Some users report that high-THC products used at unfamiliar doses can cause temporary anxiety or discomfort — this is not a guarantee either way, but it is worth noting.

All products sold through a reputable licensed platform should come with lab-tested THC/CBD figures. At Green Vault, lab testing and accurate potency labelling are non-negotiable standards. Discreet packaging is used on all deliveries, and age verification is required at checkout. Payment is handled via secure online card checkout in ZAR.

Red Flags to Avoid When Buying Cannabis in Johannesburg

Whether you are buying in Braamfontein, Soweto, or anywhere else across Johannesburg, watch for these warning signs:

• No lab testing data — if a seller cannot confirm THC/CBD content, you have no way to know what you are consuming
• No age verification — legitimate platforms enforce 18+ checks; absence of this is a serious concern
• Unverified or unlicensed sellers — street or informal market purchases carry legal risk and zero quality control
• Vague product descriptions — no strain information, no weight confirmation, no cannabinoid data
• Unsecured payment methods — avoid platforms that do not offer encrypted, traceable payment options
• No clear delivery terms — reputable Johannesburg delivery services confirm timeframes, packaging standards, and order tracking

Buyer Checklist: Choosing the Right Weight

Before completing your order, run through this checklist:

• I am 18 years of age or older
• I have verified the current South African legal position on cannabis private use
• I know which strain type suits my preference (Sativa, Indica, Hybrid, or CBD)
• I have checked the THC/CBD percentage on the product
• I am ordering a quantity appropriate to my experience level (start small if unsure)
• The platform uses lab-tested products, age verification, and secure payment
• I have confirmed same-day or next-day delivery is available to my Johannesburg suburb
• Packaging is discreet and delivery terms are clearly stated

Browse our store to find current flower, vapes, pre-rolls, and drinks — with same-day delivery across Johannesburg.

This article is intended for adults aged 18 and older. Nothing in this content constitutes medical advice. Consult a qualified healthcare professional for any health-related queries. Always verify South Africa's current cannabis regulations before purchasing or possessing cannabis products.

This article is for informational purposes only and is not medical or legal advice. Cannabis regulations change; verify current South African law before purchasing. Adults 18+ only.