The strength printed on a CBD oil label is one number — but it is the mg-per-mL calculation that actually tells you what you are getting. A bottle labelled 3000mg could deliver anywhere from 20mg to 100mg of cannabidiol per millilitre, depending on how much oil is inside. Across Australia — in Sydney, Melbourne, Brisbane, Perth, Adelaide and every other part of the country — this calculation is the first thing worth doing before you buy any hemp-derived CBD oil, from any supplier. This guide explains the maths, shows the figures for the CBD Oil Australia range, and answers the questions that come up most often around CBD oil strengths.
Why the mg-per-mL number is the one that matters
The milligram figure on a bottle label declares the total cannabinoid content of the entire bottle. It does not tell you how much you are getting per drop, per serve, or per millilitre. The per-mL concentration — which is what actually determines how much cannabidiol is in each dropper — requires one extra step.
Think of it the same way as reading a nutrition panel. A food label might show 40g of sugar per 100g of product. The packet weight on the front tells you how much product there is; the per-100g figure is the concentration. CBD oil works the same way. The mg count on the front is the total; the volume printed separately gives you the denominator.
This distinction matters most when you are comparing two bottles. Two 1000mg CBD oil bottles can have completely different concentrations if one holds 30ml and the other holds 50ml. The label strength is the same; the concentration per millilitre is not. Unless you do the divide, you are comparing totals rather than concentrations, and that comparison will mislead you on value and potency.
How to calculate mg per mL — the formula and the table
The formula has two inputs: the total milligrams on the label and the volume of the bottle in millilitres.
mg per mL = total mg ÷ total volume (mL)
Every bottle in the CBD Oil Australia range is 50ml, so the calculation is identical for every product we stock and the per-mL figures are fixed:
| Label strength | Bottle volume | CBD per mL | Per 0.5ml dropper |
|---|---|---|---|
| 1000mg | 50ml | 20mg/mL | 10mg |
| 3000mg | 50ml | 60mg/mL | 30mg |
| 6000mg | 50ml | 120mg/mL | 60mg |
| 12000mg | 50ml | 240mg/mL | 120mg |
A standard dropper holds approximately 0.5ml. The dropper column above shows how much cannabinoid that represents at each label strength. Multiply the per-mL figure by 0.5 to arrive at it: the 3000mg bottle gives 30mg per dropper serve; the 12000mg bottle gives 120mg in the same physical volume of oil.
The practical consequence is worth stating plainly. A 3000mg/50ml bottle is three times the concentration of a 1000mg/50ml bottle — not merely three times the label number, but three times the cannabidiol per millilitre. That is a meaningfully different product, and the label number alone does not make that obvious.
Our CBD oil strengths: 1000mg through 12000mg
CBD Oil Australia carries four strengths in both full-spectrum and broad-spectrum formats, plus CBG oil and CBN oil at the same four strengths. All bottles are 50ml MCT — coconut-derived MCT as the carrier — third-party lab-tested by batch, with a Certificate of Analysis available on request.
Full-spectrum CBD oil (trace THC under 0.3%)
Full-spectrum is a whole-plant hemp extract. It keeps cannabidiol together with the plant's minor cannabinoids and natural terpenes, and retains a legal trace of THC under 0.3% — confirmed on every batch COA. See the full-spectrum CBD oil guide for the complete compositional detail.
- CBD Oil 1000mg — Full Spectrum from $89.95 — 20mg/mL, 10mg per 0.5ml serve
- CBD Oil 3000mg — Full Spectrum from $220.00 — 60mg/mL, 30mg per 0.5ml serve
- CBD Oil 6000mg — Full Spectrum from $390.00 — 120mg/mL, 60mg per 0.5ml serve
- CBD Oil 12000mg — Full Spectrum from $585.00 — 240mg/mL, 120mg per 0.5ml serve
Broad-spectrum CBD oil (0% THC)
Broad-spectrum starts from the same whole-plant extraction and then goes through an additional processing step that removes the THC entirely — every batch reads 0% THC on its Certificate of Analysis. The CBD content, the MCT carrier, the 50ml bottle, and the lab-testing process are otherwise the same as the full-spectrum line. See the broad-spectrum CBD oil page for the full profile.
- CBD Oil 1000mg — Broad Spectrum from $89.95 — 20mg/mL, 10mg per 0.5ml serve
- CBD Oil 3000mg — Broad Spectrum from $220.00 — 60mg/mL, 30mg per 0.5ml serve
- CBD Oil 6000mg — Broad Spectrum from $390.00 — 120mg/mL, 60mg per 0.5ml serve
- CBD Oil 12000mg — Broad Spectrum from $585.00 — 240mg/mL, 120mg per 0.5ml serve
The one compositional difference between the two ranges is the THC figure: trace under 0.3% for full-spectrum, 0% for broad-spectrum. If you want the widest natural hemp profile including that trace, choose full-spectrum. If you want none whatsoever, broad-spectrum is the answer.
CBG oil and CBN oil strengths
CBD Oil Australia also carries two single-cannabinoid oils at the same four strengths. CBG oil (cannabigerol) is a distinct minor cannabinoid — not a CBD variant — that the hemp plant produces in small quantities early in its growth cycle, which is why it is harder to find and typically priced above CBD oils of the same volume. CBN oil (cannabinol) is a THC-free isolate of a different minor cannabinoid that forms as hemp ages.
Both are available at 1000mg, 3000mg, 6000mg and 12000mg in the same 50ml MCT format. Browse the full product range to compare all four families side by side.
How to compare strengths: cost per milligram
Beyond the mg-per-mL formula, cost per milligram is the most useful comparison when you are deciding between strengths from a value perspective.
Cost per mg = bottle price ÷ total mg
Applying that to the CBD Oil Australia full-spectrum line:
| Strength | Price | Cost per mg |
|---|---|---|
| 1000mg | $89.95 | $0.090/mg |
| 3000mg | $220.00 | $0.073/mg |
| 6000mg | $390.00 | $0.065/mg |
| 12000mg | $585.00 | $0.049/mg |
The higher the label strength, the lower the cost per milligram — a consistent pattern in the CBD Oil Australia range. Whether that efficiency matters depends on which strength you are using. Someone who follows the label's suggested serving on a 1000mg bottle may find no practical advantage in moving to a 6000mg bottle if the serving size stays the same. The maths is just a tool; it does not tell you which strength is correct for you.
Choosing a strength: start with the label serving
This guide covers label maths. It does not recommend a specific milligram amount for any person or any purpose — that is not something a product guide can responsibly do.
What a label guide can say:
Follow the label's suggested serving. Every bottle carries a printed recommended serving from the manufacturer. That figure is the starting point. Most label guidance suggests beginning with the lower end of the stated range and observing over several days before changing anything.
The 1000mg entry option. At 20mg per mL, the 1000mg bottle — both full-spectrum and broad-spectrum — is the entry-level concentration in the range. Each 0.5ml dropper delivers 10mg of cannabidiol. Many people beginning with hemp-derived CBD oil start here for that reason.
Spectrum is a separate decision. Choosing between full-spectrum and broad-spectrum is a question of whether you want any trace of THC in the product. Strength and spectrum are independent choices; you can have any strength in either format.
For anything beyond label guidance, speak to a GP or pharmacist. A healthcare professional who is familiar with cannabidiol products is the right person for a conversation about what is appropriate for a specific situation.
From our CBD oil range
CBN Oil 1000mg – Cannabinol
Cannabinol, the cannabinoid that forms as raw hemp ages, supplied here as a THC-free isolate. 1000mg of CBN in a 50ml MCT bottle, 20mg per ml — a common pick for an evening routine.
CBG Oil 6000mg – Cannabigerol
Cannabigerol, the cannabinoid that comes first in the hemp plant before the others form. Supplied as a single-cannabinoid oil. 6000mg of CBG in a 50ml MCT bottle, 120mg per ml.
Broad-Spectrum CBD Oil 6000mg
Whole-plant hemp with the THC removed and the supporting cannabinoids and terpenes retained — a 0% THC oil. 6000mg of cannabidiol in a 50ml MCT bottle, which works out at 120mg per ml.
COA verification: the number behind the number
The milligrams on the label are a stated figure from the manufacturer. A Certificate of Analysis — or COA — is the independent confirmation. It is a report from a third-party laboratory that tests the actual batch, confirms the cannabinoid content against the label claim, and states the THC figure from the same analysis.
For CBD Oil Australia products, COAs are generated on a batch-by-batch basis and are available on request for any product. Contact the store at [email protected] with the batch code printed on your bottle.
When comparing CBD oil from different suppliers, a COA is the key document to ask for. A label can state any number; only a batch-specific COA from an independent laboratory confirms what is actually inside. No COA, no reliable claim.
CBD oil legality in Australia — the national TGA framework
CBD oil for human consumption in Australia is regulated at the federal level by the Therapeutic Goods Administration — the national body that governs therapeutic products. The framework applies uniformly across Australia: the rules are the same whether you are in Sydney, Melbourne, Brisbane, Perth, Adelaide or anywhere else in the country.
Two points are worth knowing:
In 2021 the TGA rescheduled low-dose cannabidiol (products delivering up to 150mg per day) from a prescription-only Schedule 4 medicine to a pharmacist-accessible Schedule 3. In practice, few specific retail CBD products have moved through this route, and the over-the-counter pathway remains limited.
Higher-dose CBD products, and products containing THC above the low-dose threshold, remain Schedule 4 — requiring a prescription from a registered doctor via an authorised prescriber or the TGA's Special Access Scheme.
CBD Oil Australia sells oils described by their composition and makes no health claims. All products are for adults aged 18 and over and are not appropriate for anyone who is pregnant or breastfeeding. For the authoritative position on the current regulatory framework, the TGA website is the primary source.
Buying CBD oil across Australia: all four strengths, shipped nationally
CBD Oil Australia is an online store. There is no physical shopfront — orders are placed on the website and dispatched to Sydney, Melbourne, Brisbane, Perth, Adelaide and every other delivery address across Australia. The shop lists every strength and spectrum option in one place.
If you are working through the decision and want to compare the two main spectrum types before you choose, the full-spectrum CBD oil and broad-spectrum CBD oil pages go deep on the compositional differences. Our guide to using CBD oil covers how to use the dropper, how to measure a 0.5ml serving, and how to store the bottle once it arrives.
Pricing in AUD: 1000mg from $89.95 · 3000mg from $220.00 · 6000mg from $390.00 · 12000mg from $585.00.
Frequently asked questions
What does the mg number on a CBD oil label mean? It is the total cannabinoid content of the whole bottle — not the amount per serve or per drop. Divide the total mg by the total volume in mL to find the concentration per millilitre. A 1000mg bottle in 50ml delivers 20mg per mL; a 3000mg bottle in the same volume delivers 60mg per mL.
Is a 3000mg CBD oil three times stronger than a 1000mg CBD oil? If both bottles are the same volume — yes, the concentration per millilitre is exactly three times higher. If the bottle sizes differ, calculate mg-per-mL first. Comparing the headline number without knowing the volume can be misleading.
What is the difference between full-spectrum and broad-spectrum at the same strength? Both are whole-plant hemp extracts in the same MCT carrier at the same milligram count. The difference is one fact: full-spectrum retains a legal trace of THC under 0.3%; broad-spectrum has the THC removed to 0%. Strength and spectrum are independent — any label strength is available in both types.
Which CBD oil strength is best for me? Follow the label's printed serving guidance for the bottle you buy. CBD Oil Australia does not recommend a milligram figure for any specific person or purpose. For guidance beyond what the label states, speak with a GP or pharmacist who is familiar with cannabidiol products.
How do I verify the cannabinoid content of a bottle? Request the Certificate of Analysis for your batch. All CBD Oil Australia products are third-party lab-tested by batch; the COA for any bottle is available on request at [email protected]. The batch code is printed on your bottle.
Is CBD oil legal to buy online in Australia? The national framework is set by the TGA. Low-dose cannabidiol is classified as a Schedule 3 pharmacist-accessible medicine at up to 150mg per day; higher-dose and THC-containing products require a prescription. CBD Oil Australia ships to Sydney, Melbourne, Brisbane, Perth, Adelaide and all of Australia; every product is described by composition only.
Where can I buy CBD oil online in Australia? CBD Oil Australia ships full-spectrum, broad-spectrum, CBG and CBN oils at all four strengths — 1000mg, 3000mg, 6000mg and 12000mg — to Sydney, Melbourne, Brisbane, Perth, Adelaide and across Australia. Browse the full range or visit the homepage to start. Prices from $89.95 AUD.
