Thc Butter Calculator

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Advanced THC Butter Calculator: Potency & Dosage Guide


THC Butter Calculator

Accurately estimate the potency of your homemade cannabutter.


Enter the weight of the cannabis flower you are using.


The THC percentage of your cannabis. Find this on the product label.


The amount of butter you are infusing (1 cup = 227g or 2 sticks).


Accounts for THC loss during decarboxylation and infusion (typically 75-90%).


The calculation estimates the total available THC, adjusts for efficiency losses during decarboxylation and infusion, and then divides the final infused THC amount by the number of servings (tablespoons) in your batch.


Serving Size Estimated THC (mg)
Potency breakdown for common serving sizes. Use this as a guide for dosing your recipes.

Visual comparison of potential THC in the raw flower versus the estimated THC successfully infused into the butter.

What is a THC Butter Calculator?

A thc butter calculator, also known as a cannabutter potency calculator, is an essential tool for anyone making cannabis-infused edibles at home. It helps you estimate the amount of Tetrahydrocannabinol (THC), the primary psychoactive compound in cannabis, in your final batch of butter. Without a reliable thc butter calculator, dosing edibles becomes a dangerous guessing game, which can lead to unpleasant or overly intense experiences. This tool removes the uncertainty by providing a data-driven estimate of potency per serving.

This calculator is for home cooks, medical cannabis patients who create their own medicine, and recreational users who want a safe, consistent, and predictable experience. By inputting variables like the amount and potency of your cannabis and the volume of butter, the thc butter calculator performs the necessary conversions and calculations to give you a clear potency figure in milligrams (mg) per serving.

THC Butter Calculator Formula and Mathematical Explanation

The core logic of our thc butter calculator involves a few straightforward steps to determine the final potency of your infusion. The process accounts for the initial amount of THC and the inevitable losses that occur during preparation.

  1. Calculate Total Potential THC: First, we determine the total milligrams of THC available in the cannabis flower.

    Formula: (Cannabis Amount in grams × THC Percentage × 1000) = Total Potential THC in mg
  2. Account for Efficiency Loss: Not all THC will be successfully decarboxylated (activated) and infused into the butter. We apply an efficiency factor to estimate the actual amount of THC transferred.

    Formula: Total Potential THC in mg × (Infusion & Decarb Efficiency %) = Total Infused THC in mg
  3. Determine Servings and Final Potency: Finally, we calculate the number of standard servings (tablespoons) in the batch and divide the total infused THC by this number to find the per-serving potency.

    Formula: Total Infused THC in mg / (Butter Amount in cups × 16) = Potency per Tablespoon (mg/tbsp)
Variable Meaning Unit Typical Range
Cannabis Amount Weight of the raw cannabis flower. grams 3.5 – 28g
THC Percentage The potency of the raw cannabis flower. % 10% – 30%
Butter Amount The volume of butter used for the infusion. cups 0.5 – 4 cups
Infusion Efficiency The combined percentage of THC that survives decarboxylation and is successfully infused. % 75% – 90%
Key variables used in the thc butter calculator. Understanding these inputs helps in achieving more accurate results.

Practical Examples (Real-World Use Cases)

Let’s walk through two common scenarios using the thc butter calculator to see how the numbers work in practice.

Example 1: Standard Potency Batch

A user wants to make a standard batch of cannabutter for baking cookies.

  • Inputs: 7 grams of cannabis, 22% THC, 1 cup of butter, 85% efficiency.
  • Calculation Steps:
    1. Total Potential THC: (7g * 0.22 * 1000) = 1540 mg
    2. Total Infused THC: 1540 mg * 0.85 = 1309 mg
    3. Servings: 1 cup * 16 tbsp/cup = 16 tbsp
    4. Final Potency: 1309 mg / 16 tbsp = ~81.8 mg/tbsp
  • Interpretation: Each tablespoon of this butter is highly potent. A recipe calling for 1/2 cup of butter (8 tbsp) would contain approximately 654 mg of THC in total. If that recipe makes 24 cookies, each cookie would have about 27 mg, a very strong dose for most users. For more accurate edible dosing, you might consider our edible dosage chart.

Example 2: Low-Dose Medicinal Batch

A medical patient wants to create a low-potency butter for microdosing.

  • Inputs: 5 grams of cannabis, 15% THC, 2 cups of butter, 80% efficiency.
  • Calculation Steps:
    1. Total Potential THC: (5g * 0.15 * 1000) = 750 mg
    2. Total Infused THC: 750 mg * 0.80 = 600 mg
    3. Servings: 2 cups * 16 tbsp/cup = 32 tbsp
    4. Final Potency: 600 mg / 32 tbsp = ~18.75 mg/tbsp
  • Interpretation: This batch is much milder. One teaspoon (1/3 of a tablespoon) would contain approximately 6.25 mg of THC, a common starting dose. This makes the butter more versatile for medicinal use where precise, low doses are required. For further reading, see our beginner’s guide to edibles.

How to Use This THC Butter Calculator

Using our thc butter calculator is simple and intuitive. Follow these steps to get a reliable potency estimate for your homemade edibles.

  1. Enter Cannabis Amount: Weigh your cannabis flower in grams and enter the number into the first field.
  2. Enter THC Percentage: Find the THC percentage on your product’s packaging and input it. If you’re using homegrown flower, research the average potency for your strain online.
  3. Enter Butter Amount: Measure the amount of butter you plan to infuse in cups. Our calculator handles the conversion to tablespoons automatically.
  4. Set Efficiency: Adjust the efficiency slider. A setting of 85% is a good starting point for a careful home process. If you are less experienced or rush the process, a lower value like 75% might be more accurate. A precise decarboxylation calculator can help optimize this first step.
  5. Read the Results: The calculator will instantly update, showing you the estimated potency per tablespoon, the total infused THC, and a potency breakdown table for different serving sizes.
  6. Make Decisions: Use the primary result to dose your recipes. For instance, if you need 10mg per serving in a recipe that makes 20 cookies, you need 200mg total. Use the thc butter calculator results to determine how many tablespoons of your butter will provide that amount.

Key Factors That Affect THC Butter Calculator Results

The accuracy of any thc butter calculator depends on the quality of your inputs and your process. Several factors can significantly alter the final potency of your cannabutter.

  • Decarboxylation Quality: This is the most critical step. Heating cannabis (decarbing) converts non-psychoactive THCA into psychoactive THC. Under-heating results in a weak butter, while overheating can degrade THC into other cannabinoids like CBN, which is more sedative. Time and temperature must be precise.
  • Infusion Time and Temperature: A low and slow infusion is best. Simmering the cannabis in butter for 2-3 hours allows THC to bind to the fat molecules. Rushing this step or using excessive heat will lead to a less potent and potentially bitter-tasting product.
  • Starting Material Potency: The final potency is directly proportional to the THC percentage of your starting material. Using 25% THC flower versus 15% THC flower will create a significantly stronger butter, a fact that a thc butter calculator makes visually clear.
  • Grind Consistency: Do not grind your cannabis into a fine powder. A coarse grind, similar to dried oregano, provides enough surface area for infusion without introducing excess chlorophyll and plant matter, which cause a grassy flavor.
  • Straining Method: When separating the plant matter from the infused butter, do not squeeze the cheesecloth too hard. Aggressive squeezing pushes unwanted plant material and chlorophyll into your final product, affecting flavor and purity.
  • Cannabis Strain: While our thc butter calculator focuses on THC, different strains have unique terpene and cannabinoid profiles that can influence the aac. Explore our cannabis recipes to see how different strains can be used.

Frequently Asked Questions (FAQ)

1. Why are my homemade edibles inconsistent?

Inconsistency usually comes from not controlling the key variables. Using a thc butter calculator helps, but you also need to perfect your decarboxylation and infusion process. Temperature and time are everything. Without precise control, your potency will vary from batch to batch.

2. What is a standard dose of THC in an edible?

A standard dose for a novice is typically between 2.5-5 mg of THC. Experienced users may prefer doses from 10-25 mg. A dose above 50 mg is considered very high and is only recommended for individuals with a significant tolerance. Always start low and go slow.

3. Can I make this calculator more accurate?

Yes. The efficiency percentage is an estimate. Home infusion methods can have an efficiency between 70% and 90%. To improve accuracy, be meticulous with your temperature and timing during decarb and infusion. Using lab-tested cannabis with a known THC percentage is also crucial. For those looking for more precision, using a THC tincture calculator for liquid infusions can also be helpful.

4. How long does cannabutter last?

Properly stored in an airtight container in the refrigerator, cannabutter can last for several weeks. For long-term storage, it can be frozen for up to six months without significant potency loss. Check out our guide on how to store cannabutter for more tips.

5. Does the type of butter matter?

Yes, using a high-quality, high-fat butter (like European-style butter) can improve infusion efficiency, as THC binds to fat. Unsalted butter is preferred for cooking as it allows you to control the salt content in your final recipe.

6. What if I use cannabis trim instead of flower?

You can absolutely use trim, but it has a much lower THC percentage (typically 3-8%). You will need to use a significantly larger quantity of trim to achieve the same potency as flower. Input the correct THC percentage for trim into the thc butter calculator for an accurate estimate.

7. Can this calculator be used for coconut oil?

Yes, the calculation is the same. Coconut oil is another excellent fat for infusion. Simply substitute the amount of butter with the same amount of coconut oil. The thc butter calculator‘s logic remains valid as it is based on volume and potency.

8. What’s the difference between THCA and THC?

THCA is the non-psychoactive acid form of THC found in raw cannabis. The process of decarboxylation (heating) removes a carboxyl group and converts THCA into the psychoactive THC. This is why you must heat your cannabis before infusing it. A thc butter calculator assumes you are using the THC percentage after this conversion has been accounted for.

Related Tools and Internal Resources

Continue your cannabis culinary journey with these helpful resources.

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Thc Butter Calculator

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THC Butter Calculator – Estimate Cannabutter Potency


THC Butter Calculator (Cannabutter Potency)

This thc butter calculator helps you estimate the potency of your homemade cannabutter or cannabis-infused oil. By providing the amount of cannabis, its THC percentage, and the amount of butter or oil, you can get a reliable estimate of the total milligrams (mg) of THC in your infusion and the dosage per serving. This is essential for safe and consistent edibles.

Potency Estimator


Enter the weight of the dried cannabis flower you are using.
Please enter a valid, positive number.


Enter the THC percentage of your cannabis. If unknown, 15-20% is a common estimate.
Please enter a valid percentage (e.g., 20).


Enter the total amount of butter or oil you are infusing. (1 cup ≈ 227 grams).
Please enter a valid, positive number.


Estimated Total THC in Butter
869 mg

Potential THC in Flower
1400 mg

THC per Tablespoon
54 mg

THC per Teaspoon
18 mg

Formula Used: Total THC (mg) = (Grams of Cannabis × %THC × 1000) × Decarboxylation Rate (0.88) × Infusion Rate (0.70). This calculation provides an estimate, as actual potency can vary.

The table below breaks down the estimated dosage for different serving sizes of your final THC butter.


Serving Size Estimated THC (mg)

This chart visualizes the estimated THC conversion from raw flower to the final infused butter, showing potential losses during decarboxylation and infusion.


What is a THC Butter Calculator?

A thc butter calculator is a specialized tool designed for individuals who create their own cannabis-infused butter (cannabutter) or oils at home. Its primary purpose is to estimate the final THC potency in milligrams (mg) of the infusion. This allows for more accurate dosing when cooking or baking with the final product. Without a calculator, dosing edibles is pure guesswork, which can lead to inconsistent or unpleasant experiences.

Anyone making homemade edibles, from medical cannabis patients seeking consistent therapeutic doses to recreational users wanting a predictable experience, should use a thc butter calculator. A common misconception is that all the THC from the plant transfers into the butter. In reality, the processes of decarboxylation (activating THC with heat) and infusion are not 100% efficient, and this calculator accounts for those expected losses to provide a more realistic potency estimate.

THC Butter Calculator Formula and Mathematical Explanation

The calculation for estimating the potency of cannabutter involves a few key steps that account for the conversion of THCA to THC and its infusion into fat. The core formula used by our thc butter calculator is:

1. Calculate Total Potential THC: This is the maximum amount of THC available in your starting material.

Potential THC (mg) = Cannabis Weight (g) × THC Percentage × 1000

2. Account for Decarboxylation: Raw cannabis contains THCA, not THC. Heating it (decarboxylation) converts THCA to psychoactive THC. This process isn’t perfectly efficient; you lose about 12.3% of the weight in the conversion (THC molecular weight is 87.7% of THCA). A further loss in efficiency is common, so we use a conservative total efficiency factor.

Activated THC (mg) = Potential THC (mg) × 0.88

3. Account for Infusion Loss: Not all of the activated THC will successfully infuse from the plant matter into the butter or oil. The efficiency depends on factors like temperature, time, and agitation. A common estimate for home infusions is between 60-90%. Our calculator defaults to a conservative 70% infusion rate.

Final THC in Butter (mg) = Activated THC (mg) × 0.70

The following table explains the variables involved in any reliable thc butter calculator.

Variable Meaning Unit Typical Range
Cannabis Amount The weight of the dry cannabis flower used. grams (g) 3.5 – 28 g
THC Percentage The concentration of THC in the cannabis strain. Percent (%) 10% – 30%
Butter Amount The volume of fat (butter, coconut oil, etc.) used for infusion. cups 0.5 – 4 cups
Decarboxylation Rate The efficiency of converting THCA to THC. Multiplier 0.88 (average)
Infusion Rate The efficiency of THC transferring into the fat. Multiplier 0.60 – 0.90

Practical Examples (Real-World Use Cases)

Example 1: Standard Potency Batch

A user wants to make a standard batch of brownies. They have 7 grams of cannabis with a labeled 22% THC content and plan to infuse it into 1 cup of butter.

  • Inputs: 7g cannabis, 22% THC, 1 cup butter.
  • Calculation using the thc butter calculator:
    • Potential THC: 7g * 22% * 1000 = 1540 mg
    • After Decarb (x0.88): 1540 mg * 0.88 = 1355.2 mg
    • After Infusion (x0.70): 1355.2 mg * 0.70 ≈ 949 mg Total THC
    • Per Tablespoon (16 tbsp/cup): 949 mg / 16 ≈ 59 mg/tbsp
  • Interpretation: The entire cup of butter contains about 949 mg of THC. If their brownie recipe calls for 1/2 cup of butter (474.5 mg) and makes 16 brownies, each brownie would have approximately 30 mg of THC, which is a potent dose for most users.

Example 2: Mild Potency Batch for Microdosing

Another user wants to make a less potent oil for daily microdosing. They use 5 grams of a milder strain at 14% THC and infuse it into 2 cups of coconut oil.

  • Inputs: 5g cannabis, 14% THC, 2 cups oil.
  • Calculation using the thc butter calculator:
    • Potential THC: 5g * 14% * 1000 = 700 mg
    • After Decarb (x0.88): 700 mg * 0.88 = 616 mg
    • After Infusion (x0.70): 616 mg * 0.70 ≈ 431 mg Total THC
    • Per Teaspoon (96 tsp/2 cups): 431 mg / 96 ≈ 4.5 mg/tsp
  • Interpretation: The total infusion is 431 mg. A single teaspoon containing around 4.5 mg of THC is an ideal amount for microdosing, allowing for controlled and minimal psychoactive effects. Check out our edible dosage calculator for more details.

How to Use This THC Butter Calculator

  1. Enter Cannabis Amount: Weigh your dry cannabis flower and enter the amount in grams into the first field.
  2. Enter THC Percentage: Find the THC percentage on your product’s packaging. If you don’t know it, using an average of 15-20% is a reasonable starting point. Enter this value into the second field.
  3. Enter Butter/Oil Amount: Measure the amount of butter, coconut oil, or other fat you will be using for the infusion and enter it in cups.
  4. Read the Results: The thc butter calculator will automatically update. The large number is the total estimated THC in your entire batch of butter. The smaller boxes show the potential THC in the flower before loss and the estimated potency per tablespoon and teaspoon.
  5. Consult the Dosage Table: Use the breakdown table to see the estimated THC for common serving sizes, which is critical for making safe edibles. Our decarboxylation guide provides more info on this crucial step.

Key Factors That Affect THC Butter Potency

The accuracy of any thc butter calculator depends on several variables. Understanding these can help you improve your infusion process and get more consistent results.

  • Cannabis Potency (THC%): This is the most significant factor. A 25% THC strain has double the potential potency of a 12.5% strain. Always use lab-tested percentages when available.
  • Decarboxylation Time & Temperature: Over-heating or under-heating during decarboxylation can drastically reduce the amount of activated THC. Too hot, and you can degrade THC into other cannabinoids like CBN. Too cool, and you won’t convert all the THCA.
  • Infusion Time & Temperature: A low-and-slow infusion (e.g., 2-3 hours at a low simmer) is generally more efficient at extracting THC than a quick, high-heat method. Agitating the mixture regularly also improves efficiency.
  • Surface Area: Grinding your cannabis before decarboxylation and infusion increases the surface area, allowing the fat to more effectively extract the cannabinoids from the plant material. Avoid grinding it into a fine powder, which can make straining difficult.
  • Type of Fat Used: Fats with high saturated fat content, like coconut oil and butter, are excellent at binding with cannabinoids like THC. This makes them more efficient carriers for infusion than lower-fat oils. This is a key part of cannabis cooking.
  • Straining Method: When you separate the plant matter from the infused butter, you can lose a significant amount of oil. Using a cheesecloth and squeezing thoroughly (without over-squeezing to get plant matter) is crucial to maximize your yield. Some loss is inevitable.

Frequently Asked Questions (FAQ)

1. How accurate is this thc butter calculator?

This calculator provides a close estimate based on standard efficiency rates for decarboxylation and infusion. However, actual results can vary by 10-20% or more due to the factors listed above. It should be used as a guide for harm reduction, not as a lab-certified guarantee. The only way to know the exact potency is through laboratory testing.

2. Can I use this calculator for other oils, like coconut oil?

Yes, absolutely. This thc butter calculator works for any type of fat-based infusion, including coconut oil, olive oil, or ghee. The infusion efficiency may vary slightly between fats, but the estimates will still be in a reliable range.

3. What if I don’t know the THC percentage of my cannabis?

If you’re using an unknown strain, a conservative estimate is between 15% for “average” quality and 20% for “high” quality cannabis. It’s always better to underestimate the potency and start with a smaller dose. You can learn more about this in our guide to THC potency.

4. Why is my cannabutter not as strong as the calculator predicted?

The most common reasons are inefficient decarboxylation (wrong temperature or time), not infusing for long enough, or using a strain with a lower THC percentage than you thought. Also, ensure you are thoroughly straining your butter from the plant material to recover as much as possible.

5. How should I store my THC butter?

Store your THC butter in an airtight container in the refrigerator for up to several weeks or in the freezer for several months. Label it clearly to avoid accidental consumption. Light and air can degrade THC over time, so proper storage is key.

6. Does the calculator account for CBD?

This calculator is specifically designed for THC. While the infusion process is similar for CBD, you would need to know the CBD percentage of your flower to calculate the CBD potency. You can use our separate CBD oil calculator for that purpose.

7. What is a good starting dose for an edible?

For beginners, a starting dose of 2.5mg to 5mg of THC is recommended. Wait at least two hours before considering taking more, as edibles can have a delayed onset. This thc butter calculator is a critical tool for helping you measure these small doses accurately.

8. Can I re-infuse my butter to make it stronger?

Yes, you can run a second batch of decarboxylated cannabis through already-infused butter to increase its potency. Simply use the infused butter as your starting fat and repeat the process. The fat does have a saturation point, but for most home applications, a double infusion is very effective.

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