Cannabis Butter Calculator
Accurately estimate the potency of your homemade cannabutter for safe and consistent dosing. This cannabis butter calculator is your best tool for kitchen infusions.
Potency Calculator
Enter the total weight of the dry cannabis flower you are using.
Find this on your product’s label. If unknown, 15-20% is a common average.
Enter the total amount of butter (or oil) you are infusing. 1 cup ≈ 227 grams.
| Unit | Estimated THC Potency (mg) |
|---|---|
| Per Cup | 0 mg |
| Per Tablespoon (tbsp) | 0 mg |
| Per Teaspoon (tsp) | 0 mg |
| Per Gram of Butter | 0 mg |
What is a Cannabis Butter Calculator?
A cannabis butter calculator, often called a cannabutter calculator, is an essential tool for anyone making cannabis-infused edibles at home. Its primary purpose is to estimate the final potency (in milligrams of THC) of your homemade cannabis butter or oil. By inputting variables like the amount of cannabis, its THC percentage, and the amount of butter, the calculator performs a series of calculations to provide a reliable dosage estimate. This is crucial for ensuring a safe, consistent, and enjoyable experience, preventing the common problem of accidental overconsumption.
This tool is for home cooks, medical cannabis patients who create their own medicine, and culinary enthusiasts exploring the world of edibles. A reliable cannabis butter calculator demystifies the infusion process. Common misconceptions are that all THC from the plant transfers to the butter, but in reality, steps like decarboxylation and fat infusion have efficiency losses, which a good calculator accounts for. Check out our edible potency calculator for more advanced options.
Cannabis Butter Calculator Formula and Mathematical Explanation
The accuracy of a cannabis butter calculator hinges on a multi-step formula that accounts for cannabinoid activation and extraction loss. Here’s a step-by-step breakdown of how the calculation works.
- Calculate Initial THC Mass: First, we determine the total potential THC in the raw plant material.
Formula: Initial THC (mg) = Cannabis Weight (g) × 1000 × (THC % / 100) - Account for Decarboxylation: Raw cannabis contains THCA, which must be heated (decarboxylated) to convert into psychoactive THC. This process is not 100% efficient. We assume a 90% efficiency rate, a standard estimate.
Formula: Post-Decarb THC (mg) = Initial THC (mg) × 0.90 - Account for Infusion Efficiency: Not all of the activated THC will successfully bind to the fat (butter/oil). The efficiency varies by fat type and method, but a common estimate for butter is 85%.
Formula: Final Infused THC (mg) = Post-Decarb THC (mg) × 0.85 - Determine Potency per Unit: The total infused THC is then divided by the total volume of your butter to determine the dosage per serving.
Variables Table
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Cannabis Amount | Weight of the raw cannabis flower | Grams | 1 – 28 g |
| THC Percentage | Potency of the cannabis flower | Percent (%) | 10% – 35% |
| Butter Amount | Volume of the infusion medium (butter/oil) | Cups | 0.5 – 4 cups |
| Decarb Efficiency | Percentage of THCA converted to THC | Ratio | 0.8 – 0.95 |
| Infusion Efficiency | Percentage of THC absorbed by the fat | Ratio | 0.7 – 0.9 |
Practical Examples (Real-World Use Cases)
Example 1: Standard Potency Batch
A user wants to make a standard batch of brownies and uses the cannabis butter calculator for dosing.
- Inputs: 7 grams of cannabis, 20% THC, 1 cup of butter.
- Calculation:
– Initial THC: 7g * 1000 * 0.20 = 1400 mg
– Post-Decarb THC: 1400 mg * 0.90 = 1260 mg
– Final Infused THC: 1260 mg * 0.85 = 1071 mg in the entire cup of butter. - Interpretation: The full cup of butter contains approximately 1071 mg of THC. If the brownie recipe makes 16 servings, each brownie will have about 67 mg of THC (1071 / 16), which is a very high dose. The user might decide to use half cannabutter and half regular butter to reduce the dose. For more details on dosing, see our cannabutter dosage chart.
Example 2: Low-Dose for Microdosing
A medical patient needs to create a low-potency oil for microdosing throughout the day.
- Inputs: 3 grams of cannabis, 15% THC, 2 cups of coconut oil.
- Calculation from the cannabis butter calculator:
– Initial THC: 3g * 1000 * 0.15 = 450 mg
– Post-Decarb THC: 450 mg * 0.90 = 405 mg
– Final Infused THC: 405 mg * 0.85 = 344.25 mg in two cups of oil. - Interpretation: The total infusion has ~344 mg of THC. Since there are 32 tablespoons in 2 cups, each tablespoon contains about 10.75 mg. One teaspoon would contain about 3.6 mg, which is a suitable microdose.
How to Use This Cannabis Butter Calculator
- Enter Cannabis Amount: Weigh your dry cannabis flower in grams and enter the number into the first field.
- Enter THC Percentage: Input the THC percentage as listed on your product’s packaging. If you don’t know it, use an estimate (15-20% is typical for decent quality flower).
- Enter Butter Amount: Add the quantity of butter or oil you are infusing, measured in cups.
- Read the Results: The cannabis butter calculator will instantly update the total THC in your batch, as well as the potency per tablespoon, teaspoon, and gram. The chart visualizes where the potential THC is lost.
- Make Decisions: Use the “Potency per Tablespoon/Teaspoon” to accurately dose your recipes. If the potency is too high, consider diluting your cannabutter with regular butter. Always start with a small dose and wait at least two hours before consuming more. To learn more, read our guide on how to make potent cannabutter.
Key Factors That Affect Cannabis Butter Potency
Several variables can influence the final strength of your cannabutter. Understanding these is key to mastering your infusions and getting the most out of our cannabis butter calculator.
- Starting Material Potency: This is the most significant factor. A flower with 25% THC will yield a much stronger butter than one with 15% THC, assuming all other variables are equal.
- Decarboxylation Time & Temperature: Over-heating or under-heating during decarboxylation can either destroy THC or fail to convert enough THCA, respectively. A precise temperature (around 240°F/115°C) is crucial. Learn more in this decarboxylation explained guide.
- Infusion Time: While many believe longer is better, infusing for 2-3 hours is generally sufficient. Infusing for too long (e.g., 8+ hours) at a high temperature can lead to THC degrading into CBN, a less psychoactive cannabinoid.
- Type of Fat Used: Fats with higher saturated fat content, like coconut oil and butter, are more efficient at absorbing cannabinoids than oils with lower saturated fat. This is a key part of any good THC infusion guide.
- Agitation: Stirring the mixture occasionally during infusion helps ensure that the cannabis makes full contact with the fat, improving extraction efficiency.
- Grind Consistency: A coarse grind is ideal. If the cannabis is ground too finely into a powder, it becomes difficult to strain out completely, leading to plant matter in the final product and potentially altering the taste.
Frequently Asked Questions (FAQ)
1. How accurate is this cannabis butter calculator?
This cannabis butter calculator provides a close estimate based on standard efficiency rates for decarboxylation (90%) and infusion (85%). However, actual potency can vary due to factors like temperature fluctuations, material quality, and infusion technique. It’s a guide, not a lab test.
2. What if I don’t know my flower’s THC percentage?
If the THC % is unknown, you have to estimate. A common average for mid-grade cannabis is 15-20%. For high-quality dispensary-grade cannabis, it could be 20-30%. Always dose cautiously when estimating.
3. Can I use this calculator for CBD butter?
Yes, the formula is the same for CBD. Simply substitute the THC percentage with the CBDA percentage of your starting material. The efficiency rates are very similar.
4. Why did my butter turn out weaker than the calculator predicted?
This could be due to several reasons: the initial THC% was lower than stated, the decarboxylation temperature was too high or too low, the infusion time was too short, or not enough fat was used to absorb all the cannabinoids. Using a cannabis butter calculator helps, but technique matters.
5. Can I use kief or concentrates with this calculator?
Yes. For kief or hash, use a THC percentage estimate of 30-50%. For concentrates like wax or shatter, the THC percentage can be 70-90%. The calculation principles remain the same.
6. Does the type of butter matter?
Clarified butter (ghee) is often preferred as it has a higher smoke point and contains no milk solids, which can burn during infusion. However, regular unsalted butter works well. The fat content is the most important part. Explore different cannabis cooking basics for more ideas.
7. How should I store my cannabutter?
Store it in an airtight container in the refrigerator for up to several weeks, or in the freezer for up to six months. Label the container clearly with the date and estimated potency from the cannabis butter calculator.
8. What’s the best way to test the potency of my final product?
The safest way is to “start low and go slow.” Try a very small amount, like 1/4 or 1/2 of a teaspoon, and wait at least two hours to gauge the effects before trying a larger dose. Note your experience and adjust accordingly.