Cannabis Oil Potency Calculator

Cannabis oil potency calculator

Calculate the estimated THC potency of homemade cannabis-infused oils made with flower or concentrates. See total THC, THC per ounce, tablespoon, teaspoon, and milliliter of finished oil.

Enter Your Infusion Details

Enter the amount used in grams.
Enter the THC percentage listed on your flower or concentrate package.
Enter the total finished oil amount in ounces after infusion and straining.

This calculator uses an estimated 80% infusion efficiency. Actual potency may vary based on decarboxylation, infusion method, product testing accuracy, and natural cannabis variation.

Estimated Results

Total Estimated THC —
THC Per Ounce —
THC Per Tablespoon —
THC Per Teaspoon —
THC Per mL —

Enter your recipe details to see your estimated potency.

Example Calculation

If you infuse 14 grams of cannabis flower at 20% THC into 8 ounces of finished oil and estimate 80% infusion efficiency, the estimated total THC is:

14 × 1,000 × 20% × 80% = 2,240 mg THC total

That equals approximately 280 mg THC per ounce, 17.5 mg THC per tablespoon, and 5.8 mg THC per teaspoon.

THC Oil Strength Guide

Strength THC Per Teaspoon
Mild Under 5 mg
Moderate 5–10 mg
Strong 10–20 mg
Very Strong 20–40 mg
Extremely Potent 40+ mg

Suggested THC Serving Sizes

Experience Level Suggested THC Amount
Beginner 2.5–5 mg THC
Moderate 5–10 mg THC
Experienced 10–20 mg THC
High Tolerance 20 mg+ THC

Start low and increase slowly, especially with homemade cannabis oils. Effects can take longer to appear when swallowed compared to inhaled cannabis.

How to Make Cannabis Infused Oil

Cannabis infused oil is one of the easiest homemade cannabis recipes and can be used for edibles, capsules, salves, lotions, massage oils, and more.

Simple Cannabis Infused Oil Recipe

Ingredients

  • 14 grams cannabis flower
  • 1 cup MCT oil, coconut oil, olive oil, or avocado oil
  • 1 teaspoon sunflower lecithin, optional

Equipment

  • Baking sheet and parchment paper
  • Double boiler, slow cooker, or infusion machine
  • Fine mesh strainer or cheesecloth
  • Glass jar or dropper bottle

Step 1: Decarb the Cannabis

  1. Preheat oven to 240°F.
  2. Break cannabis into small pieces.
  3. Spread evenly on a parchment-lined baking sheet.
  4. Bake for 35–40 minutes.
  5. Let cool completely before infusing.

Step 2: Infuse the Oil

  1. Add decarbed cannabis and oil to a double boiler or slow cooker.
  2. Heat gently between 160°F and 180°F.
  3. Infuse for 2–4 hours, stirring occasionally.
  4. Avoid overheating or boiling the oil.

Step 3: Strain and Store

  1. Strain through cheesecloth or a fine mesh strainer.
  2. Pour into a clean glass jar or dropper bottle.
  3. Store in a cool, dark place or refrigerate for longer shelf life.
Example: 14 grams of 20% THC flower infused into 1 cup of oil at 80% efficiency equals approximately 2,240 mg THC total, or about 47 mg THC per teaspoon.

Ways to Use Cannabis Infused Oil

  • Homemade gummies
  • Cannabis capsules
  • Brownies and baked goods
  • Salves and lotions
  • Massage oils
  • Food recipes and dressings

Recommended Supplies

Oils

  • MCT Oil
  • Refined Coconut Oil
  • Olive Oil
  • Avocado Oil

Ingredients

  • Sunflower Lecithin

Straining Supplies

  • Cheesecloth
  • Fine Mesh Strainer

Storage Containers

  • Amber Glass Dropper Bottles
  • Mason Jars
  • Glass Storage Bottles
  • Silicone Funnels

Equipment

  • Digital Scale
  • Double Boiler
  • Slow Cooker
  • Herbal Infusion Machine
  • Digital Thermometer

Frequently Asked Questions

How accurate is this cannabis oil calculator?

This calculator provides an estimate based on the amount of cannabis used, THC percentage, finished oil volume, and 80% efficiency. Actual potency can vary depending on decarboxylation, infusion method, straining, and the accuracy of the THC percentage entered.

What types of oil can be used for cannabis infusions?

Many oils can be used for cannabis infusions, including coconut oil, MCT oil, olive oil, avocado oil, grapeseed oil, sunflower oil, and other food-safe carrier oils.

How many mg of THC are in one ounce of cannabis oil?

The THC per ounce depends on how much cannabis you used, the THC percentage, infusion efficiency, and how many ounces of finished oil you made. Enter your recipe details above to calculate the estimated THC per ounce.

Can I use concentrates instead of flower?

Yes. Select “Concentrate” from the dropdown and enter the concentrate weight in grams and THC percentage. This can be used for distillate, RSO, FECO, rosin, live resin, and other cannabis concentrates.

Why is my homemade cannabis oil weaker or stronger than expected?

Homemade cannabis oil can vary because of flower quality, concentrate potency, decarboxylation, infusion time, temperature, straining loss, and how much finished oil remains after the process.

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