Important notice: This article is for information only and is not medical advice. CBD products are not medicines and do not replace a diagnosis or a treatment. If you have health questions or take medication, speak to a healthcare professional.
How to use CBD oil, and what its dosage is, are questions that the product class and the label answer in Switzerland, not a recommendation. The CBD oils sold on uWeed are cosmetic or aromatic products and are not intended for ingestion. Guides written for the UK or the US describe oils sold there as food supplements, which is not how CBD oil is sold here. CBD oil, often sold as CBD drops, is one and the same product: a hemp extract containing cannabidiol (CBD) in a carrier oil.
Unlike a CBD dosing guide written for supplements, this CBD dosage guide does arithmetic, not advice. We show you how CBD oil is used by product class, how to turn the percentage and bottle size into mg of CBD per drop, a chart from 5% to 40%, and what Swiss law says about taking CBD oil.
What does CBD oil dosage mean?
CBD oil dosage is the amount of cannabidiol (CBD) that one drop or one millilitre of oil contains, in milligrams. It follows from two figures on the label: the concentration in per cent and the bottle size in millilitres. A CBD oil at 10% holds about 5 mg of CBD per drop, one at 20% about 10 mg.
Three words are often mixed up. The concentration, also called strength, is the percentage on the label; the dosage is the CBD per drop worked out from it; and a CBD dose is one single amount. In Switzerland there is no official dosage recommendation for freely sold CBD oils, because they are placed on the market as a cosmetic or as an aromatic oil. So when you ask us about cannabidiol dosage, or about CBD dosing and doses in general, you get a calculation: we convert, we do not recommend.
How to calculate the CBD in a bottle?
To calculate CBD oil dosage, you need three values from the label: percentage, bottle size and drops per ml together give the CBD content per bottle, per ml and per drop. The CBD dosage calculator does this conversion for you: it turns the label values into mg of CBD per ml, per drop and per bottle, and it recommends nothing.
The same calculation works by hand, in four steps:
- Read the label: note the concentration in per cent and the bottle size.
- Convert the percentage into mg per ml: multiply the concentration by 10.
- Determine the drops per bottle: count on about 20 drops per ml.
- Work out the mg per drop: divide the mg per ml by 20.
A 10 ml bottle at 10% holds 1,000 mg of CBD, about 5 mg per drop. The label is the only input, never body weight, a goal or how you feel, and the result is a guide value, because a drop is not a calibrated unit. That is how to dose CBD on paper: CBD dosage guidelines here start from the label, not from a dose guide written for supplements, and the sections below take the steps one by one.
CBD oil percentage, total mg and bottle volume on the label
The label of a CBD oil carries three numbers, and only together do they say how much CBD is in the bottle: per cent, millilitres and milligrams. These are the details to look for, whatever the brand:
- concentration in per cent, for example 5%, 10% or 20%
- bottle size in ml, often 10 ml, also 30 ml
- total CBD in mg, for example 1,000 mg
- spectrum: full-spectrum, broad-spectrum or isolate
- batch number and best-before date
- certificate of analysis, via QR code where there is one
The CBD oil percentage, also called CBD concentration or CBD oil strength, is the share of CBD in the content. The same percentage in a larger bottle means more CBD in total, not more per drop. Across CBD oil in Switzerland, strengths run from 5% to 40%, and what is a high CBD percentage is simply a position in that range, a fact about the label. Bottle size times percentage gives the total: 10% means 100 mg of CBD per ml, so 10 ml at 10% hold 1,000 mg.
How many mg are in a drop of CBD oil?
At around 20 drops per ml, a drop of 10% CBD oil holds about 5 mg of CBD and a drop of 20% oil about 10 mg. How many mg in a drop of CBD oil is a division, once you know two values: the mg of CBD per ml and the drops per ml.
The three steps follow one by one: count the drops, convert the percentage, divide. The result remains a guide value, because a drop is not a calibrated unit.
1. Drops per ml and per bottle with a dropper
Around 20 drops per ml is a guide value of the dropper, not a measurement. A 10 ml bottle gives about 200 drops, a 30 ml bottle about 600. Drop size varies with the dropper, the viscosity of the carrier oil and the temperature. How to use a CBD oil dropper, in this context, is simple: it portions the oil drop by drop, which is what makes the arithmetic per drop possible.
10 ml × 20 drops per ml ≈ 200 drops
2. Converting the percentage into mg of CBD per ml
A single multiplication turns the CBD concentration in per cent into milligrams per millilitre:
Concentration (%) × 10 = mg of CBD per ml
An oil at 5% holds 50 mg/ml. 10% CBD is 100 mg per ml, and 20% CBD is 200 mg per ml. The formula works for every CBD oil strength in between, so 15% gives 150 mg per ml.
3. Working out the mg of CBD in one drop
You get the CBD oil mg per drop by dividing the mg per ml by the drops per ml:
mg of CBD per ml ÷ drops per ml = mg of CBD per drop
At 10%, that is 100 ÷ 20, so 5 mg of CBD per drop. At 20%, 200 ÷ 20 gives 10 mg of CBD per drop. At 20 drops per ml there is a rule of thumb: half the percentage, in mg, is the CBD per drop. This too remains a guide value.
CBD dosage chart by oil strength from 5% to 40%
This CBD dosage chart replaces the arithmetic: it converts every strength from 5% to 40% into mg of CBD per ml, per drop and in 10 ml, and it recommends nothing. The last column shows how many drops 10 mg of CBD correspond to; 10 mg is a round value for the calculation, not a suggested amount.
| Strength | mg of CBD per ml | mg of CBD per drop (at 20 drops per ml) | mg of CBD in 10 ml | Drops for 10 mg of CBD (calculation value) |
|---|---|---|---|---|
| 5% | 50 | 2.5 | 500 | 4 |
| 10% | 100 | 5 | 1,000 | 2 |
| 15% | 150 | 7.5 | 1,500 | about 1.3 |
| 20% | 200 | 10 | 2,000 | 1 |
| 30% | 300 | 15 | 3,000 | about 0.7 |
| 40% | 400 | 20 | 4,000 | 0.5 |
To read it: 10% gives 5 mg per drop, 20% gives 10 mg, and the same applies to every CBD oil strength in the chart. Whatever the brand, the percentage on the label is what counts. All values are guide values, because droppers differ; if the total CBD in mg is printed on the bottle, that figure takes precedence.
How many drops of CBD oil per day?
For CBD oil sold in Switzerland as a cosmetic or as an aromatic oil, there is no recommended number of drops of CBD oil per day, and no recommended number of mg of CBD per day, because it is not intended for ingestion. That is the honest answer to “how many mg of CBD per day?”, to “how much CBD oil should I take?” and to “how much CBD should I take?” too.
How much CBD per day is mentioned elsewhere goes back to studies on investigational products and to authorised medicines. There, CBD is given under medical supervision, and those amounts do not carry over to cosmetic or aromatic oils, so for these products there is no answer to how many mg of CBD you should take, or how much CBD at all.
What can be stated with certainty is the conversion: how many mg one drop holds, which the chart above shows for every strength. If you are asking for health reasons, or you take medication, discuss it with a healthcare professional. What is known about CBD drug interactions is summarised in an article of its own.
What is a standard dose of CBD?
There is no standard dose of CBD for the oils freely sold in Switzerland, neither a standard amount nor an answer to how many drops of CBD oil you start with, because they are sold for external use or as aromatic oils. What dose of CBD applies is a question about intake, and Swiss law answers it with the classification of the product. Standard and weight-based figures come from medicine research and apply to prescribed preparations, set by a doctor. What you can calculate is what the label states: the mg of CBD per drop and per bottle, with the method above.
How to use CBD oil in Switzerland as a cosmetic or aromatic oil?
How to use CBD oil in Switzerland is decided by its product class. CBD oil reaches the market in two classes here: as a cosmetic oil for external use, or as an aromatic oil under chemicals law. The class is stated on the label, and the manufacturer’s directions come first.
Aromatic oils sold to consumers are denatured, as a general ruling of 29 March 2022 requires. What UK or US guides call a CBD tincture or a food supplement is not how CBD oil is sold here, so whether you ask “how do I use CBD oil?” or how to use CBD oils from different brands, there is no single best way to use it: the class decides. How do you use CBD oil, then? As the label says. The two sections below show what that means on the skin and how the uses differ by class.
How to apply CBD oil to the skin?
You apply cosmetic CBD oil like any other care oil: as part of your skincare routine or in a massage. CBD oil application on the skin takes four steps:
- Clean and dry the skin.
- Put a few drops into the palm of your hand with the dropper.
- Spread the oil on the skin and massage it in until absorbed.
- Close the bottle and store it cool and dark.
The carrier oil sets consistency and scent: MCT oil is neutral, hemp seed oil smells nutty. How to use CBD drops on the skin always follows the manufacturer’s directions on the label, which take precedence over any general guide.
CBD oil usage by product class
CBD oil usage is defined in Swiss law: it depends on the product class and has nothing to do with health conditions. Three classes exist, two of them on free sale :
| Product class | Intended use | Excluded |
|---|---|---|
| Cosmetic | externally on the skin, in skincare or massage | ingestion |
| Aromatic oil | use as stated by the manufacturer | ingestion, hence denatured |
| Authorised medicine (for comparison) | on prescription, through a pharmacy | free sale |
Freely sold CBD oil is therefore neither a food nor a food supplement nor a medicine. How to use full-spectrum CBD oil is no different from a broad-spectrum one: the class sets the use, while the spectrum only describes what the extract contains. This article names no illness or complaint as a use.
How to take CBD oil and what does Swiss law say?
Freely sold CBD oils, including those on uWeed, are not intended for ingestion: on taking CBD oil, Switzerland has a clear answer, and it is a legal one. The name on the bottle, oil or drops, does not change the product class.
People searching for how to take CBD oil or how to consume CBD oil usually mean sublingual or oral use. Studies, and countries where the oils are sold as food supplements, describe CBD given under the tongue; that is reported practice, with other products and under other rules.
In Switzerland, CBD to be taken exists only as an authorised or prescribed medicine, supplied through a pharmacy. For that reason this article gives no instructions for taking CBD oil. CBD oil from a Swiss pharmacy is therefore a different product from the oils on free sale, with its own rules.
Why is CBD oil not sold for ingestion in Switzerland?
CBD oil is not sold for ingestion in Switzerland because it may not be sold as a food or as a food supplement: it reaches the market as a cosmetic or as an aromatic oil. Cosmetics are meant for external use, and aromatic oils are denatured so that they are not swallowed. The reason is the product class, not a verdict on the substance. On top of that, Swissmedic, the Federal Office of Public Health (FOPH) and the Federal Food Safety and Veterinary Office (FSVO) state in their guidance on CBD products (version 8.0, valid from 1 May 2025) that the safety of oral intake cannot currently be fully assessed because of data gaps. Instructions on how to take CBD oil orally come from markets such as the UK or the US, where the same kind of oil is sold as a supplement. Other rules, such as the limit of under 1% THC, are explained in the overview on why CBD is legal in Switzerland.
When to take CBD oil?
There is no recommended time to take CBD oil, because the oils freely sold in Switzerland are not intended for ingestion. Many users report fixed habits, some in the morning, others in the evening; these are user reports, which we do not judge and from which no recommendation follows.
For external use, the time of day plays no part. It follows your own care routine, in other words whenever you look after your skin anyway.
Can you take CBD oil every day?
For the oils freely sold in Switzerland, the question does not arise in law: they are not intended for ingestion, neither once nor over a longer period. The Swiss authorities, namely Swissmedic, the FOPH and the FSVO, consider the data on the oral intake of CBD incomplete, and that includes data on long-term use. The adverse effects described in research are summarised in the article on CBD side effects.
If you want to use CBD for medical reasons over a longer period, check this with a doctor. Prescribed preparations exist for that, and so does a professional who knows your situation.
Common mistakes when reading a CBD oil label
Most mistakes happen when comparing, not when calculating. These seven concern the label and its directions, each with the correct reading:
- Confusing per cent and milligrams. Per cent is not milligrams: the percentage says how concentrated an oil is, the mg say how much CBD the bottle holds.
- Overlooking the bottle size. Same strength, different bottle size: 10 ml and 30 ml at the same percentage hold different amounts of CBD.
- Comparing by price per bottle. Compare the price per mg of CBD instead: the bottle price divided by the total CBD in mg.
- Treating a drop as an exact unit. Count on about 20 drops per ml as a guide value, not a measurement.
- Not opening the lab report for the batch. Where a certificate of analysis is available, it shows the measured CBD content of that batch.
- Skipping the CBD directions on the label. They state the product class and the intended use.
- Storing the oil badly. Warmth and light change consistency and drop size; keep the bottle cool, dark and closed.
Read this way, you compare two oils in a few minutes. Per cent, millilitres and milligrams always belong together, and the lab report shows what was measured in the batch. How to keep an opened bottle is covered in the guide to CBD oil shelf life.
Frequently asked questions about CBD dosage
Does the effect of CBD depend on the dose?
Whether the effect of CBD depends on the dose has no simple answer. Clinical studies examine CBD in very different amounts, and their results are mixed. Those studies work with investigational products, not with the oils sold on uWeed. What research says about dose and effect is put in context in the overview of the effects of CBD.
What is considered a high dose of CBD?
For the oils on uWeed, neither a high dose nor a daily maximum is defined, because they are not intended for ingestion. So we give no answer to how much CBD you can take in a day, neither as a limit nor as an all-clear. What research and authorities report on high amounts is summarised in the article on CBD overdose. If you feel unwell after swallowing oil by accident, seek medical advice.
Is CBD dosage the same for pets?
No, CBD dosage is not the same for pets: products for dogs and cats are a category of their own, with their own directions from the manufacturer. The arithmetic from the label to mg per drop stays the same; the products do not. More is in the guide to CBD oil dosage for dogs and cats, and questions about your own animal belong with a vet.
The bottom line on CBD oil usage and dosage
How to use CBD oil follows its product class on the label, cosmetic or aromatic oil, and ingestion is not intended for the oils freely sold in Switzerland. CBD oil dosage is arithmetic from the percentage and the bottle size: the concentration times 10 gives the mg of CBD per ml, and divided by about 20 drops, the mg per drop. The chart from 5% to 40% is the shortcut if you would rather not calculate yourself. Arithmetic, not advice: with these three points you can read any label, whatever the brand and bottle size in front of you.
