Dosing used to be confusing to me until this knowledgeable and very patient fella in a Facebook group walked me through the equation step by step. Unless you get your stuff tested in a licensed lab, there is no knowing how strong your edibles are.
Concentrate Dosage Equation:
Concentrate Potency Percentage x 100 = Number of Milligrams
Milligrams/48 teaspoons = Milligrams of THC per one teaspoon dose
*Example using a concentrate with 86% THC to make 1 cup concentrate infused oil or butter.
Please note there are 48 teaspoons in a single cup.
86% x 100 = 860mg
860mg/48 teaspoons = 17.92mg of THC per one teaspoon dose