Free tool
CBD dosage calculator
A conservative starting-dose estimate based on your body weight, experience, and what you're using CBD for. Start low, hold for a few days, increase only if needed.
Want the full reasoning? Read the complete dosage guide →
Inputs
Full-spectrum includes a legal trace of THC; broad-spectrum has the THC removed.
Your suggested starting dose
35 mg/day
≈ 1 mL per day (about 1 dropper) of your 1000 mg / 30 ml oil. Split AM/PM.
~0.5 mL AM and ~0.5 mL PM.
How to titrate from here
- Hold this starting dose for 5–7 days. Watch how you feel.
- If you need more, increase by 5 mg/day and hold another 5–7 days.
- Don't exceed 55 mg/day without speaking to a healthcare provider.
- If you take prescription medications, check interactions first.
Choosing full-spectrum vs THC-free
You’ve picked full-spectrum — it keeps the minor cannabinoids and a legal trace of THC.
If you’re drug-tested, sensitive to THC, pregnant or breastfeeding, or taking other medications, consider broad-spectrum (THC-free) instead — same CBD, no THC.
Either way, your starting dose above is the same — it’s based on CBD content, not spectrum. Start low and go slow.
Want to go deeper?
Complete dosage guide →
The full method behind this calculator — body weight, severity, condition, product type.
Bioavailability — why dosage varies →
Oil vs. gummy vs. cream: how much CBD your body actually absorbs.
CBD + your prescription meds →
CYP450 enzymes, the grapefruit rule, what to check before you start.
Side effects to watch for →
Dry mouth, drowsiness, GI changes — what's normal, what to flag.
CBD for sleep →
Timing, dosage windows, and what works for non-REM vs. sleep-onset issues.
CBD for pain →
Acute vs. chronic, topical vs. systemic, when to combine.
CBD for anxiety →
Why lower doses often work better, and what the research suggests.
Dosing for dogs →
Pets are different — body weight maths are similar, but spectrum and excipients matter more.