Evidence based

CBD Dosage: Beginner’s Guide & CBD Dosage Calculator

The optimal dose of CBD depends on your weight and the potency of the oil you’re using.

Learn how to find the perfect dose using our CBD dosage calculator.

Article By
Justin Cooke , posted 2 weeks ago

Everybody’s been talking about CBD oil and its long list of health benefits. You’ve shopped around and found a high-quality CBD oil to start yourself off with and you’re ready to get started.

So now what?

How much do I take? Can I take too much?

In this article, we’re going to talk about dosing CBD oil. We’ll cover how dosing can vary depending on factors like weight, age, the condition you’re treating, the potency of the oil you’re using, and more.

You’ll learn how to find the best dose for your body, and what to do if you experience side effects

To make dosing as easy as possible, you can also use our CBD oil dosage calculator — which estimates your optimal dose based on your weight, desired strength, and potency of the CBD oil you’re using. 

  • MEDICALLY REVIEWED BY

    Abraham Benavides, M.D., Medical Doctor

    Updated on September 13, 2020

  • Table of Contents

CBD Oil Dosage Calculator

Your Weight
Desired Strength
Total CBD (optional)How much CBD is in the bottle (found on the label)?
mg
Volume (optional)How big is your bottle of CBD?
Powered by

Embed this map on your site

Copy and paste the code below

Successfully copied to clipboard!

Include this code unmodified to your website to display the calculator. The widget will appear exactly where you insert the code. Copy the code, and paste it into your site\’s HTML code.

What’s the Normal Dose of CBD?

The most common dose of CBD is 20 – 40 mg per dose. Some people take much less (as low as 1 mg), others take much higher (up to 100 mg).

Depending on the strength of the product you’re using, this could be anywhere from a few drops to several milliliters of oil. It could also involve anywhere from 1 – 5 capsules or gummies per dose.

The truth is that the optimal dose of CBD is different for everybody.

It’s common for two people with identical weight to respond very differently to the same dose of CBD. One person may find the ideal dose for them is 30 mg of CBD, while the other responds better to just 10 mg.

The ideal dose of CBD for you depends on a variety of factors, including:

  1. Your size and weight
  2. The severity of the condition you’re treating
  3. Your tolerance to CBD
  4. Your individual body chemistry
  5. The potency of the CBD oil, capsules, gummies, or other CBD products you’re using

The best way to find the right dose for your body is to start with a very low dose (2 mg, for example) and increasing by 2-5 mg per dose until you find what works best for you.

Calculating the Dose of CBD Based on Your Weight (How This Calculator Works)

While the dose of CBD is unique for everybody, there is a general rule of thumb that can be used to determine an estimated dose based on your weight and the strength of effects you’re looking for (low, medium, and high strength).

cbd dosage

Our dosage calculator is based on the calculations listed below. These doses are estimates and should not be used to replace professional medical advice regarding dosage.

I recommend you start with the low-strength dose when using CBD for the first time and increase the dose slowly over time. When you find a dose that works, you’ve found the right dose for your body. If you experience side effects, you’ve found your upper limit. Reduce the dose to the last amount that didn’t produce side effects.

Calculating the Dose of CBD By Weight & Strength:

  • Low strength → 1 mg CBD per 10 pounds (2 mg per 10 kg)
  • Medium strength → 3 mg CBD per 10 pounds (7 mg per 10 kg)
  • High strength → 6 mg CBD per 10 pounds (13 mg per 10 kg)

It’s important to note that this measurement is in pure CBD, not CBD oil.

We’ll go over calculating how much CBD oil this dose works out to later on. Once you know how much CBD you should be using, you can find the equivalent amount of CBD oil depending on the potency of the oil you’re using.

Doses of CBD by Weight & Strength (in mg)

Weight (lbs)Low StrengthMedium StrengthHigh Strength
100 lbs10 mg30 mg60 mg
125 lbs13 mg38 mg75 mg
150 lbs15 mg45 mg90 mg
175 lbs17 mg52 mg105 mg
200 lbs20 mg60 mg120 mg
225 lbs22 mg67 mg135 mg
250 lbs25 mg75 mg150 mg

What CBD Strength Should I Use?

The more CBD you take, the stronger the effects. Some conditions require relatively strong CBD doses to offer any benefit — others may only need a low strength to provide notable results.

Ask yourself, “what am I using CBD oil for?”

This is an important question to ask because it will guide you in the direction of the right dose to take.

  1. Anxiety → medium to high strength
  2. Arthritis → medium to high strength
  3. Cancer → high strength or pharmaceutical grade
  4. Chronic pain → medium to high strength
  5. Colitis & Inflammatory Bowel Disease → medium to high strength
  6. Epilepsy → high strength or pharmaceutical grade
  7. General health → low strength
  8. High blood pressure → medium to high strength
  9. Migraine headaches → low to high strength
  10. Muscle recovery → low to medium strength
  11. Nausea → low to medium strength
  12. Polycystic ovarian syndrome (PCOS) → low to medium strength
  13. Premenstrual Syndrome (PMS) → low to high strength
  14. Insomnia → medium to high strength
  15. Weight loss → low to medium strength

Dosing CBD: 4 Steps to Finding the Perfect Dose of CBD Oil

The easiest way to find your optimal dose of CBD is to use the CBD dose calculator above to identify your “low strength” dose for your weight. Alternatively, you can use the calculations listed above to find the dosages based on your weight manually.

From here, you can gradually increase the dose each day until you find relief from symptoms or experience side effects (usually fatigue or grogginess). If you experience side effects, reduce the next dose to the last amount that didn’t cause any negative effects.

Never start at the high strength if you‘ve never used CBD oil before.

If you want to get even more accurate with your dosing, follow the four steps below.

Step #1: Find Your Optimal Dose

The first step is to find the ideal starting dose of CBD to use. This is based on your weight.

Here’s the General Rule of Thumb for Dosing According to Weight & Strength:

 Weight MetricLow StrengthMedium StrengthHigh Strength
Imperial (pounds)1 mg  every 10 lbs
(0.1 mg/lb)
3 mg every 10 lbs
(0.3 mg/lb)
6 mg every 10 lbs
(0.6 mg/lb)
Metric (kilograms)2 mg every 10 kg
(0.2 mg/kg)
7 mg every 10 kg
(0.7 mg/kg)
13 mg every 10 kg
(1.3 mg/kg)

How To Calculate Dose From Your Weight

[YOUR WEIGHT IN POUNDS] x [DESIRED STRENGTH (0.1, 0.3, or 0.6 mg)]= [YOUR DOSE IN MG CBD]

If you prefer metric, the formula changes only slightly:

[YOUR WEIGHT IN KG] x [DESIRED STRENGTH (0.2, 0.7, 1.3 mg)] = [YOUR DOSE IN MG CBD]

Here’s an example of this in practice:

Let’s say you’re a 170-pound male, and you’re looking for a medium strength dose.

All you need to do is multiply your total weight (170 pounds) by the desired dose equivalent (0.3 mg per pound for medium strength).

[170] x [0.3 mg] = 51 mg CBD

So a good starting dose for you would be about 51 mg CBD per day in this case.

How much CBD oil is this? Next, you need to figure out how much CBD oil you’ll need to achieve this dose. You can measure this in drops or milliliters of oil.

Step #2: Determine the Potency of Your CBD Oil

The potency of the oil you’re using has a direct impact on the amount you’ll need to reach the optimal dosage.

For example, a high-strength CBD oil containing 1500 mg of CBD per ounce will require ten times less oil to reach a given dose of CBD than a low-potency oil with just 150 mg per ounce.

You’ll need to know how much CBD is provided in every milliliter of oil.

Sometimes the manufacturers will make this super easy for you and tell you the concentration of CBD per mL of oil directly on the bottle. Other times, this information isn’t provided, but the formula to find the concentration of an oil is very simple to do yourself.

Here’s What You Need to Take Into Account:

  1. Bottle size (in mL)
  2. Amount of CBD listed on the bottle (300 mg, 600 mg, 1000 mg, etc.)

Use This Formula to Calculate Potency:

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

Let’s use an example.

Royal CBD makes a hemp oil that advertises 600 mg per bottle. The bottle size is 1 ounce (30 mL).

Let’s put this into our formula:

[600 MG] ÷ [30 ML] = [20 MG/ML CBD].

Our Answer: 20 mg CBD for every 1 mL of liquid.

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

For example, if you want a dose of 20 mg CBD, take 1 milliliter of oil — which conveniently works out to one full dropper. If you want 10 mg, take half a dropper. For 30 mg, take one and a half droppers, and so on.

Reference Chart for CBD Oil Potencies:

Bottle Size300 mg CBD Oil600 mg CBD Oil1000 mg CBD Oil1500 mg CBD Oil
15 mL20 mg/mL40 mg/mL66 mg/mL100 mg/mL
30 mL10 mg/mL20 mg/mL33 mg/mL50 mg/mL
50 mL6 mg/mL12 mg/mL20 mg/mL30 mg/mL

Step #3: Convert the Dose into Drops (Optional)

To make dosing easier, you can convert your dose into drops next. The number of drops you need to hit the dose will depend on how potent it is.

Knowing the drop dosage is useful when working with high potency CBD oils. It’s also useful if you’re using CBD oil for pets or with children where even slight changes in the dose can make a big difference.

Most droppers dispense 30 drops for every mL of oil — so you can find the dose per drop by dividing the dose per mL by 30.

Here’s the formula:

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

Using our example from above, which was a 600 mg CBD oil in a 1 ounce (30 mL bottle). The potency of this oil was 20 mg per mL, so we can calculate the CBD dose per drop by dividing this number by 30 (30 drops in 1 mL):

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

Common CBD Oil Doses By Drop (Assuming the Dropper Provides 30 Drops per mL):

Bottle Size300 mg CBD Oil600 mg CBD Oil1000 mg CBD Oil1500 mg CBD Oil
15 mL0.7 mg/drop1.3 mg/drop2.2 mg/drop3.3 mg/drop
30 mL0.3 mg/drop0.7 mg/drop1.1 mg/drop1.7 mg/drop
50 mL0.2 mg/drop0.3 mg/drop0.6 mg/drop0.8 mg/drop

How to Find the Number of Drops of CBD Oil You Need Based On Your Target Dose:

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

All you have to do to find the exact number of drops needed to get your dose of CBD is divide the total dose by the potency per drop of CBD oil:

[TARGET DOSE OF CBD (Ex: 51 mg)] ÷ [POTENCY OF CBD OIL PER DROP (Ex: 0.7 mg)] = DOSE OF CBD OIL IN DROPS

Using our example from before, the calculation would look like this:

[51 mg] ÷ [0.7 MG/DROP] = 73 Drops of CBD Oil

Quick Reference Chart For Finding The Number of Drops Per Dose For Common CBD Oil Potencies

Dose 300 mg 600 mg 1000 mg 2500 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 Drops11 Drops
35 mg 105 Drops 52 Drops 31 Drops13 Drops
40 mg 120 Drops 60 Drops 36 Drops14 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 Drops20 Drops
60 mg 180 Drops 90 Drops 54 Drops22 Drops
65 mg 195 Drops 97 Drops 58 Drops23 Drops
70 mg 210 Drops 105 Drops 63 Drops25 Drops
75 mg 225 Drops 112 Drops 67 Drops 27 Drops
80 mg 240 Drops 120 Drops 72 Drops29 Drops
85 mg 255 Drops 127 Drops 76 Drops31 Drops
90 mg 270 Drops 135 Drops 81 Drops32 Drops
95 mg 285 Drops 142 Drops 85 Drops34 Drops
100 mg 300 Drops 150 Drops 90 Drops 36 Drops

Step #4: Tweak The Dose To Match Your Body

The steps listed above will help you find the ideal target dose in pure CBD and how much CBD oil you need to take to reach that dose.

The next step is to start taking this dose and slightly tweak the amount every day until you find what works best for you.

This is one of the most important steps.

As mentioned earlier, everyone responds to CBD oil differently. This means that you need to assess how it affects you individually, rather than going off the experiences of everyone else.

Your friend may find the right dose at 20 mg, while you may require far more or far less.

The only way to really identify this is to start with the dose calculated above, and then tweak it from there.

Perhaps you took 20 mg and didn’t find any relief in your symptoms — the logical step is to increase it to the next strength tier and reassess again.

In our example, we went with the medium strength — for the next dose, calculate the higher strength (6 mg per 10 pounds) instead;

[170] x [0.6 mg] = 102 mg CBD

Or perhaps you took the 20 mg and found excellent relief, but became a little too drowsy as a result, now it’s time to tweak the dose to a slightly lower amount.

This process is never finished — you’ll always be reassessing how it affects you and changing the dose slightly to accommodate.

Every time you try a new brand of CBD, the dose can change due to factors such as:

  1. The ratio of cannabinoids in the oil
  2. The ratio of terpenes in the oil
  3. Whether the oil is a full-spectrum oil or a CBD isolate
  4. The overall potency of the oil

Pro Tip: Match the Potency of the Oil With Your Estimated Target Dose

CBD oils come in a wide range of potencies. It helps to match the potency of the oil with the most likely dose you’re going to be using.

For example, you wouldn’t want to use an ultra-high potency CBD oil if you planned on using a low dose of just 5 mg per dose. Each drop of oil may contain more than your desired dose, making it easy to take too much.

Likewise, if your goal is to use a high-strength of CBD, buying a low-potency CBD oil (300 mg or less) doesn’t make much sense because you’ll end up having to use a quarter of the bottle for every dose.

Here are some general recommendations for what potency CBD oil to use based on your target dose:

  • 5 mg CBD dose — 250 mg CBD oil or lower
  • 10 mg CBD dose — 250 mg CBD oil or lower
  • 15 mg CBD dose — 250 – 500 mg CBD oil
  • 20 mg CBD dose — 250 – 500 mg CBD oil
  • 25 mg CBD dose — 500 – 1000 mg CBD oil
  • 30 mg CBD dose — 500 – 1000 mg CBD oil
  • 35 mg CBD dose — 500 – 1000 mg CBD oil
  • 40 mg CBD dose — 500 – 1000 mg CBD oil
  • 45 mg CBD dose — 500 – 1000 mg CBD oil
  • 50 mg CBD dose — 1000 mg CBD oil or higher
  • 55 mg CBD dose — 1000 mg CBD oil or higher
  • 60 mg CBD dose or more — 1000 mg CBD oil or higher

Top-Rated Best CBD Oils for 2020

Number Product Total CBD Potency Cost per mg CBD Link

1

Royal CBD Oil

250 – 1000 mg

8.3 – 33.3 mg/mL

$0.15 – $0.26

2

Gold Bee CBD Oil

1200 mg

40 mg/mL

$0.12

3

Good Morning. By Headery

900 mg

30 mg/mL

$0.08

4

Hemp Bombs CBD Oil

300 – 4000 mg

10 – 133.3 mg/mL

$0.07 – $0.17

5

Social CBD Drops

1000 mg

33.33 mg/mL

$0.07

6

CBDistillery CBD Isolate Tinctures

250 – 5000 mg

8.3 – 166.66 mg

$0.11 – $0.04

7

Kat’s Naturals Relax THC-Free Sublingual CBD Oil

50 – 300 mg

10 mg/mL

$0.20 – $0.40

Key Takeaways: How Much CBD Should I Use?

CBD affects everybody differently, so it’s best to start with a low dose when using CBD for the first time and increase gradually every day.

Use the CBD dosage calculator listed at the top of this page to find recommendations based on your weight and desired strength of effects.

The most common dosage range for CBD products is 20 – 40 mg per dose. Some people take one dose per day, others take two or even three doses in a single day.

The potency of the CBD oil, capsules, or other CBD products you’re using is very important. You’ll need a much smaller dose of a high-potency CBD oil compared to a low potency CBD oil.

If you haven’t found a CBD oil to use, I recommend checking out our list of the best CBD oils, best CBD capsules, or best CBD gummies to get started.

Further Reading

Further Reading