THC Milligram Math: Reading mg Numbers on Hemp Labels

Every guide in this series keeps arriving at the same number, so this one is about the number itself. Milligrams per dollar — total cannabinoid milligrams divided by price — is the only figure that compares a 386 mg two-pack of gummies with a 4,950 mg five-pack of pre-rolls and a 3.5 gram jar of flower on equal footing. Sticker prices cannot do that, because the packs are different sizes; per-gram prices cannot either, because edibles are not sold by the gram. This is the method page the series has been missing: each gummy guide, vape guide, flower guide, and edible method walkthrough priced its own shelf with this math, and here the math itself gets the worked examples, every figure tied to a live blazed.deals listing on the morning it was pulled. All rates below come from the site pull of October 22, 2026. For adults of legal purchasing age; nothing here is medical advice, and no listing in the tables makes any claim.

Why milligrams per dollar is the only cross-format number

The definition fits on one line: divide total milligrams by price. A $24.99 listing with 3,500 mg carries 140.1 mg per dollar; a $2.99 listing with 1,000 mg carries 334.4. What makes the ratio the right comparison unit is a property worth stating plainly: it is unchanged by how you slice the pack. Price the Sour Mango Hidden Hills two-pack per piece (500 mg at $1.50) or per pack (1,000 mg at $2.99) and the rate comes out the same, because numerator and denominator use the same slice. The ratio only breaks when the two halves use different slices — which is exactly the failure mode of a printed label that disagrees with the catalog total, covered below with a live row that is wrong by a factor of five.

The same property explains why per-gram and milligrams-per-dollar are the same information flipped: one dollar buys 140.1 mg, so one gram (1,000 mg) costs 1,000 divided by 140.1, about $7.14 — the conversion the one-gram vape price guide applies across an entire shelf. The flower guide printed both columns for exactly this reason — some shoppers think in dollars per gram, others in milligrams per dollar, and neither is more correct.

The live shelf, priced one way

Ten live listings from the October 22 pull, one from each corner of the catalog, all priced with the same division:

The nine rows priced on their printed size span 11.3x in milligrams per dollar (450.4 down to 40.0). Count the jointcase row from the label-mismatch section at its catalog total and the paper span widens to 17.5x — which is the mismatch itself inflating the number, not a real shelf price. Between the honest extremes, the table shows what the rate actually buys: the same 3,500 mg of THCA flower prices at 175.1 versus 97.2 mg per dollar (a 1.8x gap between two indoor-tier jars), while the largest gaps in the table separate different formats and different compound families. Reading a single number across all of them is the point of the metric — it flags where to look — and the two sections after the next one explain why the flag needs a qualifier before it becomes a verdict.

Grams, pieces, and printed packs

Three unit conversions cover nearly every label on the shelf. First, grams to milligrams: multiply by 1,000, so a 3.5G jar holds 3,500 mg and a 2G pre-roll 2,000 — every flower and pre-roll row above starts here. Second, packs to pieces: divide the total by the piece count, which is how the Dazed two-pack checks out at 193 mg and $2.50 per piece — and per-piece math returns the same 77.4 mg per dollar as the whole-pack math, the invariance from the first section doing its job. Third, printed pack labels that could read either way: the Hidden Hills name says 500 mg 2 ct, the catalog stores 1,000 mg — consistent only if the 500 mg is per piece, which the catalog total settles. The Dozo single needs no such reading: one piece, 500 mg, no ambiguity.

Liquid volumes are the fourth case, and the trap: vape hardware prints milliliters while listings advertise milligrams. The vape guides found the catalog convention running about 920 mg per printed milliliter across this shelf — a 2 ml cart near 1,840 mg — with real exceptions in both directions. When a label gives a fill in ml and no total, the catalog total is the number to price with, not the printed fill.

When the label total and the printed size disagree

The jointcase row, held out of the main table on purpose. The White Truffle URB Jointcase prints 3.5G — 3,500 mg, $7.14 per gram, 140.1 mg per dollar, right in line with the 3.5G jars above. Its catalog total is 17,500 mg, five times the printed size, which would make it $1.43 per gram at 700.3 mg per dollar — five times the rate, from a denominator five times the label. The catalog disagrees with the printed size by exactly the factor the rate is wrong, and no sticker resolves it; the jointcase guide priced this same row with the label figure and shipped the rule: for case formats, price by the printed size unless the merchant confirms the larger total, and when a catalog total and a label disagree, re-run the division before trusting either. The same rule in reverse caught the ml fills above.

This is also why the table kept the row but the headline spread did not: a 17.5x span built on an unresolved denominator would overstate the real shelf by the mismatch factor itself.

Rank inside the compound family

The widest honest gap in the table is between two 1,000 mg gummy listings: 334.4 mg per dollar against 40.0 — about 8.4x for the same total weight. Part of that gap is compound family (delta 9 and blend packs against a delta 8 jar), part is brand and format, and the ratio alone cannot split them. That is the qualifier the series applies everywhere: rank listings inside the same family — THCA against THCA, delta 8 against delta 8 — and use cross-family rates only to spot the outliers worth a second question. The cleanest comparison in the table is the two 3.5G THCA flower jars at 1.8x apart, same weight, same family, same tier word — where the gap is almost entirely brand. A rate gap without a family match is a question, not an answer; with the family matched, it is a price.

The ten-second checklist

Priced method, stripped to four steps. Find the total milligrams: from the printed size in grams (times 1,000), from the piece count for packs, from the catalog total when the label prints ml or disagrees with itself. Divide price by total grams for the per-gram figure, or flip it — total mg divided by price — for milligrams per dollar. Slice both halves the same way, per piece or per pack, never one of each. Rank the result inside the compound family, and let cross-family gaps prompt questions instead of verdicts. Three traps to re-check on any listing: an ml fill hiding the total, a case format whose catalog total outruns its printed size, and a pack label that could read per piece or per pack.

And the figures themselves expire — merch waves re-price rows weekly, which is why every number here carries its pull date of October 22, 2026, and the deal pages are the source of truth on any given morning. The method does not expire: total divided by price, same slice on both sides, ranked in family.