CBD Serving Size Calculator
Four questions and we will show you a starting serving size in milligrams, how many servings a day, and which bottle measures that amount most easily. This is a serving size for a wellness product. It is not medical advice, and it does not tell you what to take for a medical condition.
Your details
1 serving a day — about 10–20 mg total.
One serving, with breakfast.
- 130–180 lb is the middle of the range, which is where the usual 10–25 mg starting amount comes from.
- You have not taken CBD before, so this starts low. Hold the same amount for three to five days before you change anything, then move by 5 to 10 mg.
- A morning routine is one serving a day. Take it with a meal that has some fat in it — that helps absorption.
About 12–24 drops on this bottle — a full dropper is about 17 mg. That is a little over a full dropper, so measure it in two goes.
One bottle is about 25–50 days at this amount.
Adds the Natural bottle — swap the flavor on the product page.
These statements have not been evaluated by the Food and Drug Administration. botanCBD products are not intended to diagnose, treat, cure, or prevent any disease. This calculator gives a serving size for a wellness product — it is not medical advice, and it is not a recommendation for any medical condition. Talk with your healthcare provider before starting anything new, especially if you take prescription medication.
Looking for your dog or cat? Pets are sized by their own weight, not yours — the table is on our pet guide. The pet weight table →
How the drops math works
A botanCBD bottle is 30 mL, which is roughly 600 drops. A full dropper is about 1 mL, or 20 drops. That is where every number on this page comes from.
| Bottle | mg per drop | mg per full dropper (1 mL) |
|---|---|---|
| 500 mg / 30 mL | ~0.83 mg | ~17 mg |
| 1500 mg / 30 mL | ~2.50 mg | ~50 mg |
| 3000 mg / 30 mL | ~5.00 mg | ~100 mg |
| 6000 mg / 30 mL | ~10.00 mg | ~200 mg |
Questions people ask
How much CBD should I start with?
Most adults start between 10 and 25 mg a day and hold it under the tongue for a full minute before swallowing. Stay at the same amount for three to five days before you change anything, then move by 5 to 10 mg at a time. That is the same starting range as our full dosage guide.
How does this calculator work out the number?
Three inputs move it: your weight band, how much CBD you have taken before, and whether the time of day you picked is one serving or two. The milligram-per-bottle arithmetic never changes — a 30 mL bottle is about 600 drops, so a 1,500mg bottle is 2.5 mg a drop and about 50 mg in a full dropper.
Which strength should I buy?
The one where a single serving is at most one and a half droppers. A full dropper is about 17 mg on the 500mg bottle, 50 mg on the 1,500mg, 100 mg on the 3,000mg, and 200 mg on the 6,000mg. Buy the strength that matches the amount you take, not the biggest bottle on the shelf.
Is this medical advice?
No. This is a serving size for a wellness product. It is not a recommendation for any medical condition and it is not a substitute for your doctor or pharmacist. Bring the bottle and the lab report to them and ask before you start, especially if you take prescription medication.
How long will a bottle last?
Divide the bottle by your daily amount. At 25 mg a day that is 20 days from the 500mg bottle, 60 from the 1,500mg, 120 from the 3,000mg, and 240 from the 6,000mg.
These statements have not been evaluated by the Food and Drug Administration. botanCBD products are not intended to diagnose, treat, cure, or prevent any disease. This calculator gives a serving size for a wellness product — it is not medical advice, and it is not a recommendation for any medical condition. Talk with your healthcare provider before starting anything new, especially if you take prescription medication.