Serving Size (CBD)

Supplement labels say "serving size" where people say "dose." The serving is the measured amount the label is built around: for a tincture, usually one dropper or 1 mL. The label then lists the milligrams of CBD in that serving. For example, a CBD tincture we checked on Swanson Vitamins in October 2026 prints "Serving Size 1 dropper (1 mL)", 30 servings per container, and 10 mg of CBD per serving. The big number on the front of a bottle is different. It is the total CBD in the whole bottle, not what is in one serving.

Dropper math is division. Our oils come in 30 mL bottles, so divide the bottle's milligrams by 30 to get milligrams per mL. A 500mg bottle is about 17 mg per full dropper, a 1,500mg bottle about 50 mg, a 3,000mg bottle about 100 mg, and a 6,000mg bottle about 200 mg. Our pet oil is 16.7 mg/mL. These figures assume a full 1 mL dropper. Droppers vary by brand, so check the markings on yours, and fill only to the line you mean to take. Our calculator does the math for any bottle and any fraction of a dropper.

Start low, go slow. Many adults begin at 10 to 25 mg, which on our 500mg and 1,500mg bottles is a fraction of a dropper. Hold the oil under the tongue, wait a few days before changing anything, and raise the serving in small steps if you choose to. We do not know the right serving for you, and no label can. Talk to your doctor before starting, especially if you take medication, and talk to your veterinarian before giving any CBD to a pet.