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, love your site it’s been great to learn from! If I’m using 7g cannabis at 20.11 THC to make golden dragon from 2oz grain alcohol, then evaporate off all but 2oz, and want to see mg THC in each .25ml serving, would my math look like this?
Tsp used in recipe: 12
Servings: 236
THC per serving: 5.12
Thanks in advance!
Edited to Add: I meant I used 4oz and evaporated off all by 2oz! Sorry!
No worries—that change actually matches the numbers you used.
Start: 4 oz Everclear
Final volume after evaporation: 2 oz total
2 oz = 12 teaspoons = ~59 mL
Serving size: 0.25 mL
Servings: 59 mL ÷ 0.25 mL ≈ 236 (your 236 is correct)
Potency per 0.25 mL
7 g at 20.11% has ~1,407.7 mg potential THC before losses.
After decarb and Golden Dragon extraction losses (as the calculator applies), your per-serving value around 5.1 mg is reasonable.
If the calculator’s “Total mg THC in entire recipe” shows ~1,200–1,250 mg, then:
1,225 mg ÷ 236 ≈ 5.19 mg per 0.25 mL
So your 5.12 mg/serving is right in range. Be sure in the calculator to:
Select the alcohol extraction type (Golden/Green Dragon as applicable)
Check the box to account for decarb loss
Enter “Number of teaspoons used” as 12 and “Servings” as 236
Great job dialing this in, happy crafting!
Metric version for the calculator please
Hey Anthony. I’m so happy to share that I just built a chatbot to make things even easier for you! All you need to do is enter your request into the pink circle with a message icon at the bottom right-hand side of the screen. For example, you can type your equation and ask for metric outputs and the chatbot will handle the conversion for you. It’s quick, simple, and ready to help whenever you need it. Hope this helps!
Hi Emily, We really love your site and use lots of your recipes – they are awesome! I love that you have updated the calculator – it would be absolutely amazing if we could enter the amount of oil or alcohol in metric quantities too. As a cup could be a wide variety of different measures, and the calculator doesn’t specify the exact amount.
Thank you so much for pointing that out, Kara, I just updated the calculator to accept grams as an input there, too. Let me know if that’s better for you 😀
I love your calculator, it’s so useful! That said, can you please, please consider adding a version with metric units?
Hey Dani, thank you so much for using the calculator! Yes, I will bring this to the team and see what they can create 😁
Hello I’ve been using weed since I was about 15 I’m 63 now takes me about 300 mg.to get a good buzz. I’m using now for pain mngt.any help would be great I’m trying making my own products . If you know a good recipe for deep muscle sauve
Thank you for reaching out and sharing your experience, David! It’s impressive to hear about your long history with cannabis and your initiative to manage pain through natural methods like making your own products. A deep muscle salve can be a fantastic choice for localized pain relief. Here’s a simple recipe you can try, I hope this helps!
Hello,
Firstly i want to say thank you soo much for putting in the time and work to create such an awesome tool for people like myself who do not like to Math lol.
After using the calculator in comparison with a few others, obviously getting varied results. No big deal there,(i like to use the average from a couple). But I am curious about the varying amounts as result of the binding product being infused…
To my knowledge thc binds to fats best. Im wondering why your calculator has butter outperforming coconut oil..
Please correct me if im mistaken. I had thought the only way that could be scientifically possible, is specifically using clarified butter or ghee..(which i assumed to be the case), but then i saw the Q&A “does it matter what butter i use?” With the response only referring to salted or unsalted butter.
To my understanding regular butter is not ideal(obviously still works and is widely used, as are many other lipids). But that the thc does not bind as well, due to the presence of water and milk solids.
Whereas Coconut oil, or Clarified butter have neither of those present and are mostly fat. With coconut oil having the most saturated fat which is said to dissolve and carry the thc better.
Please do not take this as anything other than a genuine question. Im a long time grower and patient. But in no way an expert, simply a lifetime student.
Thank you again for your time in putting this together, i look forward to your response,
Mike
Hey Mike, thank you so much for your kind words and thoughtful feedback! I’m so happy to hear that the tool has been helpful for you, and I really appreciate you taking the time to share your experience and ideas. That’s an excellent question about how THC binds to different fats, and I totally get why you’re curious about the different results. You’re absolutely right that THC binds with fats, and saturated fats play a big role in how well this process works. Coconut oil, since it’s loaded with saturated fats, is one of the best options for carrying THC. Clarified butter or ghee is another great choice because it doesn’t have water or milk solids, which makes it super effective for extraction, just like you pointed out. With regular butter, even though it does have water and milk solids, people still use it a lot because it gets the job done pretty well—just maybe not as efficiently as coconut oil or ghee. The Q&A about salted vs. unsalted butter mainly focused on that specific difference, but you’ve brought up an awesome point that could definitely use a closer look. I really appreciate you sharing your thoughts on butter composition, and we’ll think about adding that info to the tool for more clarity. Thanks again for your fantastic question and for being so passionate about your work as both a grower and patient. It’s clear you’ve put a lot of heart into what you do, and that “lifetime student” mindset you have is inspiring. If you’ve got any more questions, don’t hesitate to reach out—I’m always happy to help!