What Price Per Mg Actually Means for Cannabis

Price per mg is the only reliable unit for comparing cannabis products across different sizes, formats, and potencies. Without it, a cheaper-looking product often costs more per unit of active compound than an expensive-looking one.

How to Calculate It

Divide the price by the total milligrams of active compound listed on the product. For a $40 bottle of CBD oil with 1000mg CBD: $40 ÷ 1000 = $0.04 per mg. For a $25 bottle with 300mg: $25 ÷ 300 = $0.08 per mg. The first is cheaper per mg despite the higher price.

What Good Value Looks Like by Format

Based on current index data across 200+ verified online retailers:

• CBD isolate oil: $0.05-$0.12 per mg is competitive. Above $0.20 per mg typically reflects brand markup
• CBD full-spectrum oil: $0.08-$0.18 per mg is the tracked range. The premium over isolate reflects processing cost, not quality
• THC edibles (gummies): $0.06-$0.12 per mg THC is the typical online range. Below $0.05 is usually a sale price
• THC vapes (distillate, per gram): $20-$35 per gram is competitive. Live resin runs $35-$65 per gram

Where It Gets Complicated

Price per mg works cleanly within the same product format. It does not work across formats – a $0.06/mg THC gummy and a $0.06/mg THC vape are not equivalent because bioavailability, onset, and duration differ significantly. Use price per mg to compare two CBD oils or two edible products, not to compare edibles against vapes.

Cannabinoid type also matters. $0.06 per mg of THCA is not the same value as $0.06 per mg of Delta-8 – different regulatory complexity, sourcing, and effects. Price per mg is a within-category comparison tool, not a universal one.

Discount Depth in Mg Terms

Index data shows average discount depth of 30-55% off baseline when products are promoted. In mg terms, this means a product that typically costs $0.10/mg may drop to $0.05-$0.07/mg during a sale. Roughly ~8% of tracked products reach that discount level in any given week – meaningful savings are available but not on most products at most times.

Frequently Asked Questions

Is a higher mg product always better value?

Not always – but controlling for mg is the right starting point. A higher-mg product at a proportionally higher price is the same value. It only becomes better value when the per-mg cost is lower than smaller-size equivalents from the same brand or category.

Does price per mg reflect quality?

No. It reflects cost only. A higher price per mg may indicate a premium brand, a more expensive extract type, or simply a higher-margin retailer. Third-party lab results (COAs) are a better proxy for quality than price per mg.

See How CBD Oil Pricing Works Online for format-specific benchmarks. For live price data see the Cannabis Price Index.