THC Butter Calculator
Accurately estimate the potency of your homemade cannabutter with this easy-to-use calculator. Understanding the dosage is key to a safe and enjoyable experience. This tool helps you make informed decisions when cooking with cannabis.
Enter the total weight of the cannabis flower you are using.
Enter the THCA percentage of your flower. If unknown, 15-20% is a common average.
Enter the total volume of butter or oil you are infusing. 1 US cup = 227g butter.
Potency Breakdown (mg)
What is a THC Butter Calculator?
A thc butter calculator is an essential tool for anyone making cannabis-infused butter (cannabutter) at home. It provides a reliable estimate of the final potency of your edibles, measured in milligrams (mg) of THC per serving. Cannabis that hasn’t been heated contains THCA, a non-psychoactive compound. The process of heating, known as decarboxylation, converts THCA into THC, the compound responsible for the “high”. However, this process isn’t 100% efficient. Further losses occur when infusing the activated cannabis into fat like butter or oil.
Without a calculator, dosing is pure guesswork, which can lead to unpleasant experiences from overly potent edibles or disappointment from weak ones. By inputting key variables—the amount of cannabis, its THC percentage, and the volume of butter—this tool performs the complex calculations for you, promoting a safer and more consistent consumption experience. For more information on making your own, see our guide on the {related_keywords}.
THC Butter Formula and Explanation
The calculation for determining the final potency of your THC butter involves several steps that account for loss at different stages of the process. Our thc butter calculator automates this, but here is the underlying formula for transparency:
- Calculate Total Potential THC: First, determine the total milligrams of THCA in your starting material.
Formula: Cannabis Weight (g) × THC Percentage (%) × 10 = Total Potential THC (mg) - Account for Decarboxylation Loss: Decarboxylation is not perfectly efficient. The standard conversion rate from THCA to THC is about 87.7%.
Formula: Total Potential THC (mg) × 0.877 = THC After Decarb (mg) - Account for Infusion Loss: Not all THC will successfully transfer from the plant matter to the butter. A typical infusion efficiency is around 80-90%. We use 90% in our calculation.
Formula: THC After Decarb (mg) × 0.90 = Total Infused THC in Batch (mg) - Calculate Potency Per Serving: Finally, divide the total infused THC by the number of servings (e.g., tablespoons) in your batch.
Formula: Total Infused THC (mg) / Total Servings = THC Per Serving (mg)
| Variable | Meaning | Unit | Typical Range |
|---|---|---|---|
| Cannabis Amount | Weight of the raw cannabis flower. | Grams (g) | 3.5 – 28 g |
| THC Percentage | The percentage of THCA in the flower. | Percent (%) | 10 – 30% |
| Butter Amount | The volume of fat used for infusion. | Cups | 0.5 – 2 cups |
| Decarb Efficiency | The percentage of THCA converted to THC. | Ratio | 0.88 (88%) |
| Infusion Efficiency | The percentage of THC that transfers to the fat. | Ratio | 0.90 (90%) |
Practical Examples
Example 1: Standard Potency Batch
A home cook wants to make a moderately strong batch of cannabutter for cookies.
- Inputs: 7 grams of cannabis at 18% THC, infused into 1 cup of butter.
- Calculation:
- Potential THC: 7g × 18% × 10 = 1260 mg
- After Decarb (88%): 1260 mg × 0.88 = 1108.8 mg
- Infused in Butter (90%): 1108.8 mg × 0.90 = 997.9 mg
- Per Tablespoon: 997.9 mg / 16 tbsp = ~62.4 mg/tbsp
- Result: Each tablespoon of this THC butter will contain approximately 62.4 mg of THC.
Example 2: High Potency Batch
An experienced user wants to create a very potent butter for micro-dosing.
- Inputs: 14 grams of high-quality cannabis at 25% THC, infused into 1 cup of butter.
- Calculation:
- Potential THC: 14g × 25% × 10 = 3500 mg
- After Decarb (88%): 3500 mg × 0.88 = 3080 mg
- Infused in Butter (90%): 3080 mg × 0.90 = 2772 mg
- Per Tablespoon: 2772 mg / 16 tbsp = ~173.25 mg/tbsp
- Result: This highly concentrated butter contains about 173.25 mg per tablespoon, requiring very careful dosing. Explore our {related_keywords} for more ideas.
How to Use This THC Butter Calculator
Using the calculator is straightforward. Follow these steps to get an accurate estimate of your cannabutter’s strength.
- Enter Cannabis Amount: Weigh your cannabis flower using a kitchen scale and enter the amount in grams into the first field.
- Enter THC Percentage: Input the THCA percentage of your strain. This is usually listed on the packaging from a dispensary. If you’re using homegrown cannabis or don’t know the percentage, using a range of 15-20% is a reasonable estimate for average-potency flower.
- Enter Butter Amount: Measure the amount of butter or oil you’ll be using for the infusion and enter it in cups.
- Review Your Results: The calculator will instantly update, showing you the potency per tablespoon (the primary result) and the intermediate values. Use the “Potency Per Tablespoon” value to dose your recipes accurately.
For more advanced recipes, you might find our {related_keywords} guide useful, available at {internal_links}.
Key Factors That Affect Cannabutter Potency
The final strength of your THC butter is influenced by more than just the raw ingredients. Several factors can alter the efficiency of the process:
- Decarboxylation Time & Temperature: Overheating or under-heating your cannabis can destroy THC or fail to convert it properly. A common method is 240°F (115°C) for 30-40 minutes.
- Starting Material Quality: The maximum potency is always dictated by the initial THC percentage of your flower or trim.
- Infusion Time: A longer, slower infusion (e.g., 2-3 hours on low heat) allows more time for cannabinoids to bind with the fat molecules.
- Fat Type: Fats with higher saturated fat content, like butter and coconut oil, are more efficient at binding with cannabinoids than unsaturated fats.
- Agitation: Stirring the mixture occasionally during infusion helps expose more of the cannabis surface area to the fat, improving efficiency.
- Grind Consistency: A coarse grind is ideal. Grinding too finely can introduce more chlorophyll (giving a grassy taste) and makes straining more difficult.
Understanding these variables helps explain why every batch can be slightly different. For a deeper dive, read about {related_keywords} on our blog: {internal_links}.
Frequently Asked Questions
1. What is decarboxylation and why is it necessary?
Decarboxylation is a heating process that activates the compounds in cannabis. It converts non-psychoactive THCA into psychoactive THC, which is essential for making effective edibles.
2. How accurate is this thc butter calculator?
This calculator provides a strong estimate based on established efficiency rates. However, actual potency can vary due to the factors listed above. It should be used as a guide for responsible dosing, not as a lab-certified guarantee.
3. What if I don’t know the THC percentage of my cannabis?
If the source is unknown, you can make a conservative estimate. Generally, low-quality cannabis might be 10-15%, average quality is 15-22%, and high-potency is 22%+. Start with a lower estimate to be safe.
4. Can I use oil instead of butter?
Yes. The calculator works for any type of fat, including coconut oil, olive oil, or MCT oil. Coconut oil is a popular choice due to its high saturated fat content, which makes for an efficient infusion.
5. Why is my butter not very potent?
Low potency is usually caused by one of three things: low-quality starting material (low THC%), incomplete decarboxylation (not enough heat/time), or an inefficient infusion (not enough time simmering).
6. How should I store my THC butter?
Store your cannabutter in an airtight container in the refrigerator for up to several weeks, or in the freezer for up to six months to maintain freshness and potency.
7. Does the 1:1 cannabis-to-butter ratio work?
A 1:1 ratio (e.g., 1 cup of cannabis to 1 cup of butter) is a common starting point, but it’s not a measure of potency. The strength depends on the THC% of the flower, not its volume. Always use a thc butter calculator for accuracy.
8. What’s a good starting dose for an edible?
A standard beginner’s dose is considered to be between 2.5mg and 5mg of THC. After making your butter, you can use the calculated potency to dose your recipes accordingly. Always start low and go slow.