How is the CBD dose calculated?

What is the usual CBD dosage?
- Which factors affect the ideal dosage?
Determining the CBD dosage based on your body weight
Table – CBD dosage by body weight and potency (in mg)
Which potency is right for me?
CBD dosage: 4 steps to finding your ideal CBD oil dose
How much CBD should I take?
FAQ

Which factors affect the ideal dosage?

Step 1: Determine your optimal CBD dosage
- How to calculate your dose based on body weight
Step 2: Determine the strength of your CBD oil
- Reference table – CBD oil potency
Step 3: Convert your dose into drops (optional)
- Standard CBD oil dosages in drops (assuming 30 drops/ml)
- Reference table for number of drops by CBD oil potency
Step 4: Adjust the dosage to your body

How to calculate your dose based on body weight

Reference table – CBD oil potency

Standard CBD oil dosages in drops (assuming 30 drops/ml)
Reference table for number of drops by CBD oil potency

In this article, you will learn more about dosing CBD oil. We will explain how much the dosage can vary depending on various factors, such as body weight, age, ailments you suffer from, and the potency of the oil you use.

You will learn how to determine the optimal dose for your body and what to do if you experience side effects.

What is the usual dose of CBD?

Most people take 20-40 mg of CBD per dose. Some people take much smaller doses (up to 1 mg), while others need much more (up to 100 mg).

Depending on the potency of the product, this could be a few drops, but also several milliliters of oil. Or it could be 1 to 5 capsules or gummies per dose. It is true that the optimal dosage of CBD varies from person to person.

It is quite common for two people of the same body weight to react very differently to the same dose of CBD. For one person, the ideal dose may be 30 mg of CBD, while another may respond better to just 10 mg.

A woman dispensing CBD oil, various CBD products such as oils, capsules, and gummies on the right, Canatura logo at the bottom right

What factors influence the ideal dose?

The factors depend on:

Your height and weight
The severity of your condition
Your tolerance to CBD
Your body’s individual chemical composition
The strength of the CBD oil, capsules, gummies, or other CBD products you are taking

The best way to find the right dosage is to start with a very small dose (for example, 2 mg) and gradually increase it by 2–5 mg until you find the dose that works best for you.

Determining your CBD dosage based on your body weight

Although CBD dosages vary from person to person, a general rule of thumb can be used to determine an estimated dosage based on your body weight and the intensity of the effects you are seeking (low, medium, and high potency).

See below for dosage guidelines. These are only estimated doses and should not be used as a substitute for medical advice on dosage.

When you first start using CBD, it is advisable to start with a small dose and then increase it slowly. Once you find a dose that is effective, that is the dose that is right for your body.

If you experience side effects, you have reached the upper limit. Reduce the dose to an amount at which no side effects were observed.

Determining CBD dosage based on body weight and product potency:

Low potency → 2 mg CBD per 10 kg
Medium potency → 7 mg CBD per 10 kg
High potency → 13 mg CBD per 10 kg

It is important to note that this measurement is made with pure CBD, not CBD oil. Later, we will show you how to calculate the amount of CBD oil for this dose.

Once you have determined how much CBD you should take, determine the appropriate amount of CBD oil depending on the strength of the oil you are using.

Table – CBD dosage according to body weight and potency (in mg)

Body weight (kg)	Low impact	Medium effectiveness	High impact
45 kg	10 mg	30 mg	60 mg
57 kg	13 mg	38 mg	75 mg
68 kg	15 mg	45 mg	90 mg
80 kg	17 mg	52 mg	105 mg
90 kg	20 mg	60 mg	120 mg
102 kg	22 mg	67 mg	135 mg
113 kg	25 mg	75 mg	150 mg

What potency is right for me?

The more CBD you take, the more intense its effects are. To treat certain conditions, relatively high doses of CBD are needed to achieve the desired effects, while for other conditions, only low-potency products are sufficient—and you can still expect remarkable results.

Ask yourself the following question: “Why am I using CBD oil?”

This is a very important question to answer, as it is the only way to determine the optimal dose for you.

Recommended potency according to condition

Anxiety → medium to high potency
Arthritis → medium to high potency
Cancer → high potency or pharmaceutical alternative
Chronic pain → medium to high potency
Colitis and inflammatory bowel disease → medium to high potency
Epilepsy → high potency or pharmaceutical alternative
General health → low potency
Hypertension → medium to high potency
Migraine-type headaches → low to high potency
Muscle recovery → low to medium potency
Nausea → low to medium potency
Polycystic ovary syndrome (PCOS) → low to medium potency
Premenstrual syndrome (PMS) → low to high potency
Insomnia → medium to high potency
Weight loss → low to medium potency

CBD dosage: 4 steps to the ideal CBD oil dosage

The easiest way to determine the optimal CBD dosage is to use the CBD dosage table above and find the “small impact” using the table.

From this point on, you can slowly increase the dose each day until your symptoms subside or until side effects appear

(most commonly fatigue or dizziness).

If you experience side effects, reduce the dosage to the last dose you took that did not cause any negative side effects. Never start with a high potency if you have not used CBD oil before. For even more accurate dosing, follow the four steps below.

Step 1: Determine your optimal CBD dose

First, you should determine the ideal starting dose of CBD that you can take. This depends on your body weight.

Below is a general rule for dosing CBD based on body weight and the potency of the product in question:

Low impact	Medium effectiveness	High impact
2 mg per every 10 kg (0.2 mg/kg)	7 mg per every 10 kg (0.7 mg/kg)	13 mg per every 10 kg (1.3 mg/kg)

How to calculate your dose based on your body weight

[YOUR BODY WEIGHT IN KG] x [DESIRED POTENCY (0.2 or 0.7 or 1.3 mg)] = [YOUR CBD DOSE IN MG]

Practical example:

Let’s say you are a man who weighs 80 kilograms and is looking for a medium-strength dose.

Now you need to multiply your total weight (80 kilograms) by the desired dosage equivalent (0.7 mg per kilogram for medium potency).

[80] x [0.7 mg] = 56 mg CBD

In this case, a suitable starting dose would be approximately 56 mg of CBD per day. Now you need to determine how much CBD oil you need to achieve this dose. You can measure it by drops or by the amount of oil in milliliters.

Step 2: Determine the strength of the CBD oil

The strength of the CBD oil you use directly affects the amount needed to achieve the optimal dose.

For example, a very strong CBD oil with 200 mg of CBD per milliliter will require ten times less oil to achieve the appropriate CBD dose than low-potency oils (only 20 mg per milliliter).

You also need to know how much CBD is contained in a milliliter of oil.

Sometimes this is easy, as there are manufacturers who list the concentration of CBD in a milliliter of oil directly on the bottle. Sometimes this information is missing, but fortunately, the formula for calculating the concentration of oil is very simple.

What to consider:

Bottle size (in ml)
Amount of CBD listed on the bottle (300 mg, 600 mg, 1,000 mg, etc.)

Use this formula to determine potency:

[CBD IN MG] ÷ [BOTTLE SIZE IN ML] = [CBD IN MG/ML]

For example: A CBD manufacturer produces hemp oil that lists 600 mg of CBD per bottle. The bottle size is 30 ml.

Let’s plug that into our formula:

[600 MG] ÷ [30 ML] = [20 MG CBD/ML].

Our answer: 20 mg of CBD per 1 ml of liquid.

Now that you know how potent the oil is, you can determine how much you need to take to get that dose.

For example, if you need a dose of 20 mg of CBD, use 1 milliliter of oil—that’s a full dropper. If you only need 10 mg, use half a dropper. For 30 mg, use one and a half droppers, and so on.

Reference table—CBD oil potency

Bottle size	300 mg CBD oil	600 mg CBD oil	1,000 mg CBD oil	1,500 mg CBD oil
15 ml	20 mg/ml	40 mg/ml	66 mg/ml	100 mg/ml
30 ml	10 mg/ml	20 mg/ml	33 mg/ml	50 mg/ml
50 ml	6 mg/ml	12 mg/ml	20 mg/ml	30 mg/ml

Step 3: Convert the dose to drops (optional)

To make dosing easier, you can convert the dose to drops. The number of drops needed to achieve each dose depends on how strong the oil is.

This information is very useful when working with highly potent CBD oils. It can also be helpful if you are using CBD oil to treat your four-legged friends or children—in these cases, even small changes in dosage can make a big difference.

Most pipettes dispense 30 drops per 1 ml of oil – we get the dose per drop by dividing the dose per milliliter by thirty.

The formula is as follows:

[CBD PER ML] ÷ [30 DROPS] = [MG / DROPS]

Let’s look at the example above – 600 mg of CBD oil in a 30 ml bottle. The strength of this oil was 20 mg per 1 milliliter, so the CBD dosage can be calculated by dividing this number by 30 (30 drops in 1 ml):

[20 MG PER ML] ÷ [30 DROPS] = 0.7 MG CBD PER DROP

Conventional doses of CBD oil in drops (assuming the pipette dispenses 30 drops per milliliter)

Bottle size	300 mg CBD oil	600 mg CBD oil	1,000 mg CBD oil	1,500 mg CBD oil
15 ml	0.7 mg/drop	1.3 mg/drop	2.2 mg/drop	3.3 mg/drop
30 ml	0.3 mg/drop	0.7 mg/drop	1.1 mg/drop	1.7 mg/drop
50 ml	0.2 mg/drop	0.3 mg/drop	0.6 mg/drop	0.8 mg/drop

How to determine the required number of CBD oil drops based on your target dose:

You can use all this information to determine the number of drops needed to reach your target dose.

To determine the exact number of drops needed to maintain a specific CBD level, all you need to do is divide the total dose by the potency of one drop of CBD oil.

[TARGET CBD DOSAGE (example: 51 mg)] ÷ [CBD OIL POTENCY PER DROP (example: 0.7 mg)] = CBD OIL DOSAGE IN DROPS

Our example would look like this in practice:

[51 mg] ÷ [0.7 MG/DROP] = 73 drops of CBD oil

Reference table for determining the number of drops per dose for conventional CBD oil potencies

Dosage	300 mg	600 mg	1,000 mg	2,500 mg
5 mg	15 drops	7.5 drops	4 drops	2 drops
10 mg	30 drops	15 drops	9 drops	4 drops
15 mg	45 drops	22 drops	13 drops	5 drops
20 mg	60 drops	30 drops	18 drops	7 drops
25 mg	75 drops	37 drops	22 drops	9 drops
30 mg	90 drops	45 drops	27 drops	11 drops
35 mg	105 drops	52 drops	31 drops	13 drops
40 mg	120 drops	60 drops	36 drops	14 drops
45 mg	135 drops	67 drops	40 drops	16 drops
50 mg	150 drops	75 drops	45 drops	18 drops
55 mg	165 drops	82 drops	49 drops	20 drops
60 mg	180 drops	90 drops	54 drops	22 drops
65 mg	195 drops	97 drops	58 drops	23 drops
70 mg	210 drops	105 drops	63 drops	25 drops
75 mg	225 drops	112 drops	67 drops	27 drops
80 mg	240 drops	120 drops	72 drops	29 drops

Step 4: Adjust the dose to suit your body

Using the steps above, you can determine the ideal target dose of pure CBD and how much CBD oil is needed to achieve that dose.

The next step is to take this dose daily and adjust it slightly each day until you find the amount that works best for you. This is one of the most important steps.

As mentioned above, reactions to CBD oil can vary quite a bit. This means that you need to see how CBD oil affects you personally—the experiences of others are not relevant here.

Your friend may take 20 mg, while you need a much higher or lower dose.
The only way to get the right dose is clear – start with the dose specified above and then gradually adjust it.
Maybe you took 20 mg and your symptoms still haven’t subsided – now is the right time to increase the dose and then evaluate.
Or you took 20 mg and experienced significant relief – but ended up feeling too tired, so you need to lower the dose a little.

This process is never-ending – you must constantly pay attention to how CBD affects you and adjust the dosage accordingly to suit your needs.

Whenever you try a new brand of CBD product, you may need to adjust your dosage – the following factors come into play:

The ratio of cannabinoids in the oil
The ratio of terpenes in the oil
Full-spectrum oil or CBD isolate?
The overall potency of the oil

Pro tip: Compare the potency of the oil with your estimated target dose.

CBD oils are available in many potencies. It is advisable to match the potency of the oil to the most likely dose you should be taking.

It probably doesn’t make sense to use a highly potent CBD oil if you only want to take 5 mg per dose. Each drop of oil may contain more active ingredient than your desired dose, making it difficult to avoid taking too much of the active ingredient.

Accordingly, if you want to use high-potency CBD, then buying low-potency CBD oil (300 mg or less) does not make sense, as you will have to use a quarter of the bottle for a single dose.

Here are some general recommendations for CBD oil effectiveness depending on your target dose:

CBD dose 5 mg – CBD oil 250 mg or weaker
CBD dose 10 mg – CBD oil 250 mg or weaker
CBD dose 15 mg – CBD oil 250 – 500 mg
CBD dose 20 mg – CBD oil 250 – 500 mg
CBD dose 25 mg – CBD oil 500 – 1,000 mg
CBD dose 30 mg – CBD oil 500 – 1,000 mg
CBD dose 35 mg – CBD oil 500 – 1,000 mg
CBD dose 40 mg – CBD oil 500 – 1,000 mg
CBD dose 45 mg – CBD oil 500 – 1,000 mg
CBD dose 50 mg – CBD oil 1,000 mg or stronger
CBD dose 55 mg – CBD oil 1,000 mg or stronger
CBD dose 60 mg or more – CBD oil 1,000 mg or stronger

How much CBD should I take?

CBD has quite different effects, so it is advisable to start with a small dose when using CBD for the first time and then slowly increase it day by day, for example, by 2–5 mg every few days, until you find the optimal effect.

The usual dosage range for CBD products is between 20 and 40 mg per dose. Some people take one dose per day, but two or even three doses per day are not uncommon.

The key factor here is the strength of the CBD oil, capsules, or other CBD products you are taking. Compared to low-potency CBD oil, you need a much smaller dose of high-potency CBD oil.

FAQ

1. How can I easily calculate the dose of CBD oil?

Find the CBD concentration in the product (mg/ml)
Find the volume of a single dose (e.g., how many ml the dropper holds)
Calculate how many mg of CBD a single dose contains
Start with a low dose and gradually adjust it based on your body’s response

2. How to quickly calculate the CBD concentration (mg/ml)

You can determine the concentration with a simple calculation:

total amount of CBD (mg) / bottle volume (ml) = mg/ml

For example:

1000 mg of CBD in a 10 ml bottle = 100 mg/ml

3. How many drops of oil correspond to a dose of CBD?

Most droppers contain approximately 20 drops per 1 ml, but this may vary by product.

This means that: 1 drop ≈ 0.05 ml

If you know the concentration (mg/ml), you can calculate the amount of CBD in a single drop.

Example: If the oil is 100 mg/ml: 1 drop contains approximately 5 mg of CBD

4. What is the recommended dosage of CBD oil based on the intended use?

The recommended dose may vary depending on the intended use:

general health support: low doses
stress, anxiety, sleep: moderate doses
chronic conditions: higher doses

Always start with a lower dose and gradually increase it.

5. How does the dosage of CBD capsules differ from that of CBD oil?

The dosage of CBD capsules and CBD oil differs primarily in the method of absorption, the speed of onset, and dosage flexibility.

CBD oil is usually taken under the tongue (sublingually), where part of the active ingredient is absorbed directly into the bloodstream. As a result, it has a faster onset of action (approx. 15–45 minutes) and higher bioavailability than capsules.

CBD capsules, on the other hand, are swallowed and pass through the digestive system, where first-pass metabolism occurs in the liver. This means a slower onset of action (approx. 30–120 minutes), but the effect may last longer.

In terms of dosing:

CBD oil allows for very precise and flexible dosing (drop by drop)
CBD capsules have a predetermined amount of CBD per dose (e.g., 10 mg/capsule), which is simpler but less variable

The difference lies not in the potency of the product, but in how effectively the CBD is absorbed—the sublingual form may have higher bioavailability than capsules.

For a rapid onset and dose adjustment, CBD oil is more suitable, while capsules are ideal for convenient and consistent use without the need to count drops.

Author: Elena Moreau

Photo: Canva

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