An “eighth” (as in an eighth of weed) is 3.5 grams.

Quick Scoop: What Is an Eighth?

In cannabis slang, an eighth means one‑eighth of an ounce of flower, which converts to about 3.5 grams. It’s one of the most common purchase sizes at dispensaries and in casual conversations about weed.

Basic Weed Math

  • 1 eighth (⅛ oz) ≈ 3.5 grams.
  • 1 quarter (¼ oz) ≈ 7 grams.
  • 1 half‑ounce (½ oz) ≈ 14 grams.
  • 1 ounce (1 oz) ≈ 28 grams (technically about 28.35 g, but usually rounded).

Many guides treat 3.5 g as the standard, though tiny variations can happen from scale differences or rounding.

How Much Is 3.5 Grams in Practice?

People often use an eighth as a “weekend” or “few days” amount, depending on tolerance and how they consume. For example, Leafly notes that an eighth can give roughly 7–10 bowls, depending on bowl size and how tightly it’s packed.

Think of it like this: if 1 gram is a single generous session or a couple small joints, 3.5 grams is enough for multiple sessions spread across a few days for many casual users.

Always remember that effects depend on potency (THC/CBD), your body, and how you use it; start low and go slow, especially if you’re newer or trying a stronger strain.

Mini FAQ

  1. Is an eighth always exactly 3.5 g?
    • In legal and well‑run shops, yes, the target is 3.5 g, with only very small variation due to scale precision and handling.
  1. Why not just say “3.5 grams”?
    • “Eighth,” “quarter,” and “ounce” come from the old ounce‑based system and became standard slang in cannabis culture.
  1. Is an eighth a good starter amount?
    • Many beginners buy a single gram or pre‑roll first, then move to an eighth once they know how a strain affects them.

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