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WEIGHTS

How many grams are in an eighth?

An eighth is 3.5 grams — an eighth of an ounce. A quarter is 7 g, a half ounce 14 g and an ounce 28 g. Buying larger almost always costs less per gram: across our own flower the median falls from $10.00 a gram at an eighth to $1.79 at an ounce.

A single cured flower on a stand, photographed against black

The whole conversion, in one table

What people ask forWeightOn our shelf nowMedian per gramRange per gram
An eighth3.5 g277$10.00$2.85 – $20.00
A quarter7 g22$9.29$7.04 – $11.14
A half ounce14 g315$5.00$2.14 – $10.71
An ounce28 g283$1.79$0.89 – $7.14

Those are live figures from our own flower listings, recomputed every time this site is built rather than typed in once. The wider ranges at the small end are real: an eighth is where shops put both their cheapest and their most expensive flower.

Why does an ounce cost so much less per gram?

Three reasons, none of them a trick. Packaging and labelling cost roughly the same whether a jar holds 3.5 g or 28 g. Compliance testing is charged per batch, not per gram, so a bigger unit spreads it thinner. And larger units move slower, so they are priced to move.

The honest caveat: cannabis degrades once it is opened. An ounce is only better value if you will get through it while it is still good — see how long it actually lasts before buying for the per-gram figure alone.

What about the other words on the label?

  • Smalls are smaller buds from the same plants, priced lower for looking less impressive rather than testing lower.
  • Shake is what falls off during handling. Same plant, smaller pieces, lowest price per gram on any shelf.
  • Pre-rolls are usually sold by the gram — a 1 g roll is a little under a third of an eighth.
  • Edibles and vapes are sold in milligrams of cannabinoid, not grams of plant, so they do not compare to this table at all.

So which weight should you buy?

If you are new, an eighth, and accept that you are paying the worst per-gram rate on the board for the privilege of finding out what you like. Buy the ounce when you already know which batch you want it to be. Our price index publishes what every weight and tier costs across the whole shelf, updated with the catalogue.

This is not medical advice. Nothing here is a therapeutic claim, and nobody at Cannalab47 is qualified to give one. Cannabis affects people differently. Adults 21+ only.

Last updated 21 August 2026.