Standard measurements of a tincture bottle 1 tincture bottle = 30 mL (30 full droppers). Note – tincture bottles can also come in 15mL and 60mL sizes as well. 1 full dropper = 30 to 40 drops. Note – the drops in a full dropper can vary by bottle. It’s best to measure from the full dropper amount. Potency – CBD potency can vary from 50mg to 5,000mg. This can be found on the tincture bottle and will be measured in mg (milligrams). Find the potency per dropper with the following formula [Total Potency in mg / Total mL in Tincture bottle] = Number of mg per full dropper Example: A standard tincture bottle (30 mL) with a potency of 1000mg would be: 1000mg / 30 mL = 33.3 mg per full dropper Find the potency estimate per drop. Remember the drops per full dropper can vary from 30 to 40 drops. In this example we’ll use the average of 35 drops. [mg per full dropper / 35 drops] = 0.95 mg per drop. Find your recommended starting dosage. Use the CBD Dosage Calculator to calculate your recommended dosage based on health condition, condition severity and weight.