There is no single pediatric medical cannabis dosing chart by weight that fits every child. Dosing is calculated as milligrams of cannabinoid per kilogram of body weight (mg/kg), then adjusted by a physician based on diagnosis, product strength, and response. Common published starting points for CBD sit near 1 to 2.5 mg/kg per day, titrated upward slowly under supervision.
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Is there an official pediatric dosing chart?
No regulatory body publishes a universal weight chart for children. The closest thing to one is the FDA label for prescription CBD, which doses by mg/kg per day rather than by a fixed number on a chart.
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Non-prescription cannabis products vary in concentration, so the same number of milliliters can deliver very different doses from one bottle to the next.
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How do you calculate a weight-based dose?
- Convert weight to kilograms: pounds divided by 2.2.
- Multiply kilograms by the starting mg/kg per day ordered by the clinician.
- Divide the daily total into two or three smaller doses.
- Hold that amount for several days before any increase.
- Increase in small steps only with clinician guidance.
Example: a 20 kg child at 1 mg/kg per day needs 20 mg of CBD daily, which could be split into 10 mg twice a day.
Sample CBD starting ranges by weight
- 10 kg (22 lb): about 10 to 25 mg CBD per day
- 20 kg (44 lb): about 20 to 50 mg per day
- 30 kg (66 lb): about 30 to 75 mg per day
- 40 kg (88 lb): about 40 to 100 mg per day
- 50 kg (110 lb): about 50 to 125 mg per day
These figures reflect 1 to 2.5 mg/kg per day as a general reference. They are not a prescription and not a target dose.
How do you convert milligrams to milliliters?
Read the concentration on the label, usually printed as mg/mL. Divide the ordered dose in milligrams by the concentration to get milliliters.
A 15 mg dose from a 10 mg/mL oil equals 1.5 mL. The same 15 mg from a 20 mg/mL oil equals 0.75 mL.
Use an oral syringe rather than a kitchen spoon. Shake oil bottles before each draw so the cannabinoids stay evenly mixed.
What about THC for children?
Most pediatric protocols limit or avoid THC because of effects on the developing brain. Reviews link early THC exposure to changes in memory, attention, and mood regulation.
Major pediatric physician groups oppose cannabis use in children outside FDA-approved products. Some families still pursue THC-dominant formulas through a certified physician and a state medical program.
Questions parents ask
Can I dose my child by weight alone?
No. Weight sets a rough range, but diagnosis, liver health, other medications, and side effects all change the plan.
Is CBD safe for kids at any dose?
CBD is generally tolerated, but it can raise liver enzymes, cause drowsiness, and interact with seizure and blood-thinning medications.
Do we need a doctor and a card?
Yes in most states. A certified clinician must authorize a minor, and a caregiver usually manages the purchase and possession.
This guide is educational and does not replace medical advice. Talk with a pediatric specialist before giving any cannabis product to a child.