Hello and welcome! This calculator does the cannabis math for you, so you can find the exact THC and CBD potency of your homemade edibles in just a few seconds. Start in Step 1 below by entering the details of your infused product, such as cannabutter or cannabis oil. This large batch can later be used in your recipe using the second section of this calculator.
If you’re not sure what information to put here, scroll down and read the How This Calculator Works section below.
📲 Step 1: Calculate Your Batch Potency
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Starting Amount of Cannabis Product in Grams
Enter the weight of the flower or product you infused, in grams.
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THC/THCA %
Enter the percentage from your product label, e.g. 15 for 15%.
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CBD/CBDA%
Enter the percentage from your product label, e.g. 5 for 5%. Leave 0 if none.
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Type of Oil or Alcohol Used
Pick what you infused into. This sets the absorption rate used in the math.
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Amount of Oil or Alcohol Used
How much oil or alcohol you used to make the full batch.
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Account for the loss associated with Decarboxylation?
Check this box if you decarbed your product and want to account for the natural loss associated with the process.
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Potency Results For The Entire Batch
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Total mg of THC
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2800
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Total mg of CBD
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700
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Total mg of THC per teaspoon
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29.17
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Total mg of CBD per teaspoon
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7.29
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How the two steps work together: Step 1 above tells you how strong your whole infusion is. Step 2 below splits that strength across the servings in your recipe, so you can see how much THC and CBD ends up in a single serving.
📋 Step 2: Dose Your Recipe
In this section, you can add the infusion or extraction you made in step one directly into any recipe.
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How much of your infusion does this recipe use?
How much of that batch goes into this specific recipe.
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Total Number of Servings In your Recipe
How many pieces or portions your recipe makes. Used to find the dose per serving.
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Potency Results Per Serving
Edibles can take 30–120 minutes to take effect.
Estimates only — actual potency varies with your ingredients and method.
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Total mg of THC in entire recipe
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145.83
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Total mg of CBD in entire recipe
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36.46
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Total mg of THC per serving
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14.58
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Total mg of CBD per serving
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3.65
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Please note: This calculator and the information on this page are provided for educational purposes only and are not medical advice. Results are estimates, not lab-tested values. Consult a qualified healthcare professional with any questions about cannabis use.
Table of Contents
How This Calculator Works
This calculator estimates potency using a few straightforward steps. First, it converts the THC and CBD percentages of your flower into milligrams, since one gram of flower at 1% THC contains about 10 mg of THC.
It then accounts for how efficiently your chosen fat or alcohol absorbs those cannabinoids during infusion, different bases (butter, coconut oil, MCT, alcohol, and so on) pull cannabinoids out of the plant at different rates, which is why the type you select changes the result.
If you check the decarboxylation box, it also factors in the natural loss that happens when raw cannabinoids convert into their active form.
Finally, it divides the total across your batch and then across the number of servings in your recipe, so you get an estimated milligram amount per piece.
Why Your Real Results May Vary
These numbers are careful estimates, not lab results. Real-world potency depends on things this calculator can’t see: the exact cannabinoid content of your specific flower, how thoroughly you decarboxylated, your infusion time and temperature, and how evenly everything is mixed into your final recipe.
Treat the result as a well-informed starting point rather than an exact figure.
How to Find Your THC Percentage
The accuracy of your estimate depends most on one number: the THC percentage you enter.
If you bought your flower from a licensed dispensary, this is usually printed right on the label or package, often shown as “Total THC.” If you’re working with flower that didn’t come with a label, you won’t know the exact figure — but most dried cannabis flower falls somewhere in the range of roughly 10% to 25% THC.
When you’re unsure, it’s reasonable to estimate toward the lower end, since underestimating potency is far easier to adjust for than overestimating it.
One quick measuring tip: your cannabis amount is entered in grams, and there are 28 grams in one ounce — so an eighth of an ounce is about 3.5 grams, and a quarter is about 7 grams.
A Worked Example
Let’s walk through a real batch so you can see how the numbers come together. Imagine you start with an eighth of an ounce of flower (about 3.5 grams) that tests at 15% THC, and you infuse it into 1 cup of coconut oil. You then use that entire batch of infused oil to make a recipe with 48 servings.
Here’s what the calculator does with that: the 3.5 grams at 15% works out to about 525 mg of THC in your flower. After accounting for how efficiently coconut oil absorbs cannabinoids, your finished batch of oil contains roughly 434 mg of THC total. Divide that across 48 servings, and each serving comes out to about 9 mg of THC — which the calculator labels “Mild.”
If you split that same batch into fewer, larger servings, each one would be stronger; into more servings, each would be milder. That’s the whole idea: the number of servings you choose is what sets your dose per piece.
Why You Will Love This Tool
Hello and welcome to my dosage calculator designed to help you estimate how much THC or CBD is in your edibles and homemade recipes.
If you’re like the members of my Well With Cannabis Community – chances are you love making your own cannabis-infused edibles!
Not only can you save money when you make incredible recipes at home, but you can also control the ingredients and strength of your edibles.
But how exactly do you determine the potency of your edibles?
If you know the cannabinoid content of your material and how many grams of weed you’ve used, you can use this handy edibles dosage calculator to do the math for you!
This edibles calculator will then help you determine your own edibles’ CBD or THC content based on the number of servings made.
Not only does this help you determine the THC potency of your homemade marijuana edibles, but it also helps you avoid a dose that is too high, which could result in unpleasant side effects.
Frequently Asked Questions
This is the hardest part for many people! If you purchased cannabis flower from a licensed dispensary, that flower should be accompanied by lab testing, which shows the percent of THC or CBD in the flower. Unfortunately, different labeling regulations do not make this information universal. If you grew your own cannabis at home, knowing the potency of THC or CBD will be impossible without lab testing. You can, however, research strain guides that provide a general idea of the total cannabinoids in a specific strain.
If you’re working with dried cannabis flower that has not been decarbed, you will be inputting the value as THCA and checking the checkbox to account for the loss of decarboxylation if you decarb. Suppose you are working with a prepared cannabis product that already has THC present because it has already been decarbed. In that case, you will enter the value as THC and not check the checkbox to account for the loss of decarboxylation (because it has already occurred). If you have both numbers, simply run the calculation twice, once for each option.
If your concentrate already comes with a milligram dosage on the label, you do not need to use this calculator. Simply divide the total THC milligrams by the final servings in the recipe you made. For example, if you have a concentrate labeled with 750mg of THC for the entire syringe and add that syringe to a cookie recipe that makes 24 cookies, you would use the following equation: 750/24 = 31.25mg THC per cookie.
Great question! We are using different values to account for extraction efficiency. For example, olive oil will have a different extraction efficiency than coconut oil. A fat-based product will have a different level of efficiency than alcohol, which is what we are trying to account for here.
If you’re calculating the THC or CBD dosages for a cannabutter recipe, it shouldn’t matter whether you use regular butter or unsalted butter. What will matter is the amount of butter you use.
Everyone is different, and this is general educational information rather than personalized medical advice. The right amount is unique to each person, since we all have endocannabinoid systems that affect our tolerance. If you have done the math above to calculate the total mg of THC but still feel unsure where to start, check out my guide to dosing edibles safely and effectively. Many people choose to start low and go slow, often beginning with the microdosing method — for example, some begin with a small amount such as 1-3 mg of THC and adjust from there. If you are feeling lost, you can also check out my beginner’s guide to using cannabis. If you want to know you’re consuming an exact dose, my most popular edible product, Micro Gummies, can help you get started.
A segment of the population reports feeling no effects from cannabis consumed in edible form or only when a very high dose is consumed. This can depend on a variety of factors, including your individual metabolism, what you’ve eaten, the decarboxylation process, and the potency of edibles consumed. If you do not feel the effects of edibles despite consistent doses and correct time intervals, check out this guide. Ultimately, you may need to explore more efficient ways to consume cannabis, such as cannabis-infused oil used as sublingual tinctures.
My goal in providing this calculator is that you can avoid consuming too high of a THC dose. Consuming too much THC is uncomfortable and can alter your ability to perform basic functions. Adverse effects may include dry mouth, racing heart, and even a panic attack. That is why it is important to exercise caution and use the right amount of cannabis before getting started. Seek professional medical advice if needed.
I have had requests for a topical dosage calculator and a tincture calculator. Still, this calculator here can work and is a great option for calculating total THC for both tinctures and topicals.
This calculator is for educational purposes only, but if you are looking for the best way to take your cannabis education to the next level, my Edibles Made Easy Course was designed for you! This course can transform any home cook into a cannabis chef in a few simple steps. Consider it your complete marijuana handbook for the kitchen!
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Hi! I am a new member and I have not posted yet. I have a gifted ounce of Shake, and I want to make Cannabutter for fudge candy using my small-size 15-count silicone mold. I’m confused about how much butter I will need to make 60 pieces. How many milligrams per piece would be possible? I am a 67-year-old senior citizen and I need it for pain. I take no opiates after years of being on them. It is hard to start, but I am anxious to know. Smoking is a no for me. It is too harsh for my lungs. Thank you for your dedication to your community! I look forward to using CBD butter too.
Hi Deborah. Welcome to the wonderful world of Emily Kyle! Thank you for your kind words and congrats on being opiate-free! ?
I adjusted the fudge recipe serving size to 60, so you will need the following:
⅚ cup cannabutter or cannabis coconut oil
10 cups semi-sweet chocolate chips
46 ⅔ ounces sweetened condensed milk
You’ll want to make at least cup of butter which we recommend using 14oz of flower. To determine the strength of your final product, you need to know the THC percentage of your cannabis and the calculator will do the math for you! ?
Hi… I am trying out your dosage calculator, and trying to get 15mg -20mg per gummy, and not sure If I’m doing it right, my results are:
POTENCY RESULTS FOR THE ENTIRE BATCH (coconut oil)
Total Mg of THC = 3654.5
Total Mg of THC per teaspoon = 38.07
STEP 2: CREATION PORTIONS/SERVINGS (for gummy recipe)
Not sure what values I put in. For example your recipe calls for 1/2 cup of oil (24 teaspoons) so I enter that.
Then the serving size for your recipe says 12 fl oz. (354.882 ml)
My gummy mold holds 2.1 ml / 354.882 = ~168 gummies
So I enter 168 in the servings size
POTENCY RESULTS PER SERVING
Total Mg of THC in entire recipe = 913.63
Total Mg of THC in per serving = 5.44
How do l get 15-20mg per gummy ?
Hello Brenda! It looks like you’re doing the calculation correctly and getting about 5mg of THC per serving. Do you know how many grams of flower you used to make the coconut oil? If so, to get your final serving up to 15mg of THC per serving, you will need to use 3x as much flower as you did the first time. So, for example, if you used 7 grams and it yielded 5mg per serving, you would need to infuse 21 grams into your oil to yield 15 mg per serving. I hope this makes sense!
Hey this site is very helpful! But you claim it is ‘the most accurate’ calculator. Do you have any sources for your decarb reduction, and the oils reduction?
Hey Mass; thanks so much for the kind words. Here is more information for calculating the decarb reduction, and the oils calculation is based on my own research 🙂 I hope this helps!
So, I decarbed 14 grams of weed with about 20% THC and then infused it with 2 sticks of butter (ive been told 7grams to 1 stick is a good ratio to follow.) From what I get from the calculator that should be roughly 2,182.05 mg THC. Now this is where i get lost. if i use 6 tbs like in the rice crispy recipe then says each serving (10) would be about 13mg THC. I am trying to make them 100 each. which calls for more tbs, (about like, 30-35 more) I dont know, edibles confuse me so much but are fun to make, i just dont wanna kill anyone or make anyone sick. Would love you’re thoughts 🙂
Hey Zack! It sounds like you want a much stronger end product, in which case, it’s perfectly OK to use more flowers than butter. The tricky part is making sure you have enough butter to cover the number of flowers you want to use. If you can’t make it as strong as you would like, I will look into making concentrates like FECO, which makes it much easier to make a strong end product. Your sentence is perfect, “I just don’t wanna kill anyone or make anyone sick” that’s a great goal. Just know that 100mg each for a single-serving treat is not for everyone; some folks only need 5-10mg to start 🙂 Here’s more info on safe dosing!
Can I substitute
E more canna butter instead of water as my gummies aren’t very potent
Hello Lori! I haven’t tried myself, but I would be inclined to say no, you really need the water to bloom the gelatin. Would it be possible to work to make your cannabutter more potent, instead?
Could you please do a metric version? I’m happy to help if needed
Hello Astrid! Thank you for the request, we will work on this for the 2023 season 😀
Thank you for all of the work you put into this calculator and all of your articles! If I’m infusing milk, should I click “no solvent?” Thanks again!
Hello Lauren! If it’s a full fat milk, I would choose butter or oil as the solvent used! I will look into adding a milk option in the future 😀
I have question about using the calculator for determining dosage when wanting to use just decarbed cannabis i.e. a firecracker.
Using 10 gm of cannabis at a 20% strength, and no oil or alcohol used, I get a total of 1754 mg of THC (after accounting for the loss during decarboxylation.) This would be 175.4 mg per gram of cannabis, which seems awfully high.
Given that you suggest on the firecracker recipe page starting with 1/4 teaspoon (which is about 1 gm), this seems to be way too much. What am I missing? Thanks!
Hey Torsten! You’re not missing anything, you are completely correct with your math. I’m going to adjust the firecracker recipe to call for less, because yes, that is super potent for some people 😀 Thanks for pointing that out!
LOVE the site/calculator! As a newcomer to making my own edibles, this is such a great site because you break everything down in simple terms…I have a curveball for you though, I just can’t wrap my noob head around figuring out ANY approximation for my dosing!
As a noob, Google has been my friend. I made coconut infused oil (450mL) using trim from a ~20%THC harvest, recovered as waste after 2 rounds of bubble hash making (cold water extraction) as Google said the trim is still suitable for edibles.
After drying and decarboxylating the waste, I had a starting weight of 58g.
Any thoughts on how I’d approach this 58g of keifed trim in 450mL oil from a dosing standpoint? Google mentioned the waste is less potent as starting material hence the high ratio of weight to oil…sorry for the extended typing lol. I’m just so confused
Hey Jay! Thanks so much for you kind words. Unfortunately, there is literally no way to calculate an approximate dose at this point. The best option, depending on how bad you really want to know, would be to send it to a lab for testing. Potency samples run about $60. Otherwise, it truly is just a wild guess.
In the following field- TOTAL MG OF THC PER TEASPOON
35.72
Would the teaspoon refer to the tincture ( 190 proof) or a teaspoon of the FECO?
Hello Brenda! That would be for a teaspoon of the tincture. If you evaporate off all of the alcohol, the “total mg of THC” line will reflect what is in your FECO. I hope this helps!
I’m trying to calculate the dosage content and the calculator doesn’t seem to be working for me. I’m sure I’m doing something wrong but here are the details:
I used 21 g of flower to make four sticks of butter. But only used two clicks in the recipe. So I’m thinking that would be 10.5 g used.
The flower is 27% THC content and 1% CBD content.
I used two sticks of butter, or one cup.
It yielded 63 mini brownies. The batter was about 1.5 teaspoons each.
When I enter these numbers it says each portion has a THC con tent of 89, which does not sound right at all. What am I doing wrong?
Hey John. When I put in 10.5 grams of flower at 27% THC content with 1 cup of butter, without accounting for decarboxylation of infusion loss, I get 2835mg THC. Which is accurate with the math. 27% THC of 1 gram = 270mg THC. 270×10.5 = 2835. If you click to add in the loss for decarb and infusion you get 2209 mg THC. From there, you divide that by 63 for your total servings which leaves you with 35mg THC per mini-brownie. I hope this helps!
Hey Emily,
I’ve been here to use this calculator many times now and just wanted to say thank you for putting together such a useful tool.
Hello Taiga, thank you so much for the kind words, I am so glad you’re enjoying the calculator 😀
Hi. If I want to make cookies that calls for one stick of butter. Would I use all of the cannabutter or would I only substitute a few teaspoons in the recipe?
Hey Kelly. That is totally up to you and how strong you want each cookie to be. If you want it super strong, use the whole stick, and if you want it less potent, you can use just a few teaspoons or tablespoons. If you’re unsure about individual dosing, this dosing guide may help!
Why would you need to check the box for decarboxylation loss? The THC percentage of your flower has already been calculated by accounting for this loss (THCa x 0.877 + THC). So if you input this THC number and check the decarb box, you are essentially accounting for decarboxylation twice. It only makes sense to check the box if you’re inputing THCa percentage of the flower.
Also, how did you determine the loss of THC for each infusion liquid?
Thanks
Hi Jordan. Our next update will include language to read as THCA/THC for users to select the option they need. Not everyone uses products purchased from a dispensary that automatically accounts for that conversion, so the option is best left to the user.
Hello Emily,
Great site and the cannabutter then cookies I made we wonderful. I do have a question, I start with a cup of butter before the infusion process. After straining I have 6.5 ozs left, where does it all go?
Thank You
PG
Hello Philip, thanks so much for the kind words, I am so glad your cannabutter and cookies turned out good 😀 Great question; it goes two places. First, when making cannabutter, water and milk solids in the butter are evaporated and removed, which can account for up to a 20% loss in volume. Second, the flower can soak up a lot of the liquid, so depending on how tightly you strain, it may be caught up in the leftover pulp. Starting with clarified butter will help avoid this!
I also see you are already a member of my private Well With Cannabis Community, feel free to share this comment there as well to see if you get more responses from the other members ?