Disclosure: This article contains affiliate links to Cannabuben.
Disclaimer: The information in this article is for informational purposes only and does not constitute medical advice.
Why CBD Dosage Matters
CBD dosage is the number one question from beginners: how many drops should I take? And that is perfectly normal — unlike a conventional medicine, there is no universal dosage for CBD. The effective dose depends on your weight, metabolism, tolerance and your goal.
The good news: with a simple method, you can find your ideal dose within a few days.
The "Start Low, Go Slow" Method
This approach is recommended by cannabinoid experts [MacCallum & Russo, 2018]:
- Start low: 10-20 mg of CBD per day
- Wait 3-5 days at this dose to evaluate the effects
- Increase by 5 mg if the effects are insufficient
- Note your observations: mood, sleep, pain, energy
- Maintain the dose once you have found your sweet spot
The goal is to find the minimum effective dose — taking more is not always better. CBD has an inverted U-shaped response curve, meaning that excessively high doses can be less effective than moderate ones.
Dosage by Body Weight
The rule of thumb used by many practitioners:
| Body Weight | Low Dose | Medium Dose | Strong Dose |
|---|---|---|---|
| 45-55 kg (7-8.5 st) | 9-11 mg | 18-22 mg | 36-44 mg |
| 55-70 kg (8.5-11 st) | 11-14 mg | 22-28 mg | 44-56 mg |
| 70-85 kg (11-13.5 st) | 14-17 mg | 28-34 mg | 56-68 mg |
| 85-100 kg (13.5-16 st) | 17-20 mg | 34-40 mg | 68-80 mg |
| 100+ kg (16+ st) | 20-25 mg | 40-50 mg | 80-100 mg |
Calculation: 1-2 mg of CBD per 5 kg of body weight for a low to medium dose.
How Many Milligrams per Drop?
The number of milligrams per drop depends on the oil concentration and bottle volume:
| Concentration | 10 ml Bottle (~200 drops) | mg per Drop |
|---|---|---|
| 5% | 500 mg total | ~2.5 mg |
| 10% | 1,000 mg total | ~5 mg |
| 15% | 1,500 mg total | ~7.5 mg |
| 20% | 2,000 mg total | ~10 mg |
| 30% | 3,000 mg total | ~15 mg |
Practical example: you weigh 70 kg and want a medium dose of 25 mg. With a 10% oil (5 mg/drop), you need 5 drops.
Calculation Formula
Number of drops = Desired dose (mg) / mg per drop
For a 10% oil in a 10 ml bottle:
- 10 mg = 2 drops
- 20 mg = 4 drops
- 25 mg = 5 drops
- 50 mg = 10 drops
Dosage by Goal
The dosages below are based on available studies and user feedback. They are not medical prescriptions.
Stress and Mild Anxiety
- Dose: 10-25 mg/day
- Frequency: 1-2 times per day
- Recommended method: sublingual oil
- Reference: studies use doses of 25-50 mg for anxiety [Kayser et al., 2023]
Sleep
- Dose: 25-50 mg/day
- Frequency: 1 dose, 30-60 min before bed
- Recommended method: sublingual oil
- Reference: the Shannon et al. (2019) study used 25-175 mg, with the majority of subjects receiving 25 mg
Pain and Inflammation
- Dose: 25-75 mg/day
- Frequency: 2-3 doses spread throughout the day
- Recommended method: sublingual oil + local topical
- Reference: studies on chronic pain use highly variable doses [Mlost et al., 2020]
General Wellbeing
- Dose: 10-20 mg/day
- Frequency: 1 dose in the morning
- Recommended method: sublingual oil or capsule
Bioavailability: A Key Factor
Bioavailability is the percentage of CBD that actually reaches your bloodstream. It varies enormously depending on the method [Millar et al., 2018]:
| Method | Bioavailability | Implication for Dosage |
|---|---|---|
| Sublingual | 20-35% | Good compromise — standard dose |
| Inhalation | 30-40% | More efficient — lower dose possible |
| Oral (capsule, gummy) | 6-15% | Low — higher dose necessary |
| Topical | Variable (local) | Apply generously to the area |
In practice: if you switch from sublingual oil (30% bioavailability) to oral capsules (10% bioavailability), you will need roughly 3 times the dose for a comparable effect.
Tip: taking oral CBD with a meal rich in fats can significantly increase its bioavailability.
Dosage Journal: The Tracking That Makes the Difference
To find your ideal dose, keep a simple journal for 2-3 weeks:
| Day | Dose (mg) | Method | Time | Effects Felt | Sleep (1-10) | Mood (1-10) |
|---|---|---|---|---|---|---|
| D1 | 10 mg | Sublingual | 8pm | Slight calm | 6 | 7 |
| D4 | 15 mg | Sublingual | 8pm | Noticeable relaxation | 7 | 7 |
| D7 | 20 mg | Sublingual | 8pm | Good onset of sleep | 8 | 8 |
This tracking allows you to identify your optimal dose objectively.
Choosing the Right Oil Concentration
To simplify your daily dosage, choose the right concentration from the start:
- Beginner: 5% or 10% oil — fine dosing, easy to adjust
- Regular user: 10% or 15% oil — good balance
- Higher needs: 20% or 30% oil — fewer drops needed
Cannabuben offers CBD oils from 5% to 30% with accessible lab analyses, making precise dosage calculation straightforward.
Common Dosage Mistakes
- Taking too high a dose from the start — always begin with a low dose
- Not waiting long enough — oral CBD can take 90 minutes to work
- Changing the dose too quickly — wait 3-5 days before adjusting
- Ignoring bioavailability — a capsule and a sublingual oil at the same dose do not have the same effect
- Forgetting interactions — CBD alters the metabolism of certain medications [Nasrin et al., 2021]
A Note on UK Regulations
In the UK, all CBD products must contain no more than 1 mg of THC per container — this is the legal threshold set under the Misuse of Drugs Act 1971. This is stricter than the EU percentage-based limit. When choosing your CBD product, always verify that it complies with UK rules and is listed on the FSA Novel Food Register.
FAQ
How many drops of CBD per day?
A common starting point is around 2–4 drops of a 10% CBD oil per day, which equates to roughly 10–20 mg of CBD. From there, the usual advice is to increase gradually, by about 1–2 drops every 3–5 days, until you reach the dose that works for you. This 'start low, go slow' approach helps you find your optimal amount while avoiding taking more than you need. Bear in mind that the actual milligram amount per drop depends on the oil's concentration and the dropper, so two oils of different strengths are not directly comparable drop for drop. Individual needs vary widely. This is not medical advice.
What dose of CBD for sleep?
For sleep, doses of roughly 25–50 mg of CBD are commonly used, taken around 30–60 minutes before bed. A sensible approach is to begin at the lower end (about 25 mg) and increase only if needed, rather than starting high. The frequently cited case series by Shannon et al. (2019) used a dose of 25 mg daily and reported improved sleep in a proportion of participants. Because sleep is influenced by many factors and responses differ between individuals, CBD does not work the same way for everyone, and the evidence is still developing. For persistent sleep problems, it is worth seeking medical advice. This is not medical advice.
Can you take too much CBD?
CBD has a relatively good safety profile, and severe or life-threatening overdose is not described in the literature. However, very high doses can cause unpleasant side effects such as fatigue, diarrhoea or changes in appetite. The more important issue is drug interactions: CBD affects the liver enzymes that metabolise many medications, which can change their levels in the blood. A reasonable approach is to stay within commonly used dosages (around 10–150 mg per day) and to consult a doctor or pharmacist if you take other medication or have any health concerns. Avoid simply escalating the dose in search of a stronger effect. This is not medical advice.
How do you calculate the number of drops?
Working out your dose in drops is straightforward once you know the strength of your oil. The formula is: desired dose in milligrams divided by the milligrams of CBD per drop. For a typical 10% oil in a 10 ml bottle, each drop contains approximately 5 mg of CBD, so to reach a 25 mg dose you would need about 5 drops. Note that this 'mg per drop' figure changes with the oil's concentration and the size of the dropper, so always recalculate when you switch products. Reading the label for the total CBD content and bottle volume lets you estimate the per-drop amount. This is not medical advice.
Does CBD dosage depend on weight?
Body weight is one of several factors that can influence the appropriate CBD dose, though it is not the only one. A commonly cited rule of thumb is roughly 1–2 mg of CBD per 5 kg of body weight, which would put a person weighing about 70 kg in the region of 14–28 mg per day as a starting point. However, individual sensitivity, metabolism, the product's concentration and your specific goal all matter too, so weight-based figures are only a rough guide rather than a precise prescription. The most reliable approach remains starting low and increasing slowly while observing how you respond. This is not medical advice.
Conclusion
Finding the right CBD dose is not complicated if you follow a structured method. Remember these three principles:
- Start low, go slow — begin with 10-20 mg
- Keep a journal — note your doses and how you feel
- Match the concentration — choose an oil that corresponds to your needs
Patience is key. It generally takes 1-2 weeks to identify your optimal dose.
The dosages mentioned in this article are indicative and do not replace medical advice. Consult a healthcare professional before using CBD, especially if you are taking medication.
Sources
Scientific studies referenced in this article:
