Most dosing calculators hand you a number. That number is a starting point, not a safety guarantee. For anxiety, the safe zone is narrow and personal. A calculator helps you avoid the classic mistake of taking 10 mg when 2 mg would have been plenty. Use it to find a low THC dose, then let your body tell you the rest.
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What a calculator can and cannot do
A calculator converts flower, oil, or edibles into estimated milligrams of THC and CBD. It can scale a recipe or split a gummy into quarters. It cannot read your tolerance, your liver enzymes, or your anxiety history.
- Can do: convert units, estimate per-dose THC, adjust for CBD ratio.
- Cannot do: predict a panic attack, check drug interactions, replace a doctor.
Safe starting points for anxiety
For inhaled cannabis, 1 to 2 mg THC is a common starting point. For edibles, 1 to 2.5 mg, then wait at least two hours. If you are sensitive, start with CBD alone or a 1:1 ratio. High THC products tend to make anxiety worse, not better.
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- Choose a product with a known THC percentage.
- Use the calculator to find 1 mg THC.
- Take half that amount for your first test.
- Wait 15 minutes for inhaled, 2 hours for edibles.
- Write down the dose, time, and how you felt.
Why anxiety changes the math
THC binds to CB1 receptors and can spike heart rate, intrusive thoughts, and paranoia. CBD may soften some of that, but the evidence is not strong enough to call it a rescue. If you have an anxiety disorder, your threshold for a bad reaction is lower than average.
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Edibles vs. inhaled
Inhaled effects arrive in minutes. That makes it easier to stop. Edibles convert THC to a stronger metabolite, and the delay tricks people into redosing too soon. A calculator will not warn you about that. Your watch will.
Track, then adjust
Keep a simple log. Note the dose, the time, and your anxiety level at 30 minutes and 2 hours. Adjust by 0.5 to 1 mg, not by 5. A calculator is a tool for measuring, not for deciding.
When to skip the calculator
If you take SSRIs, have a heart condition, or have a personal or family history of psychosis, talk to a clinician before you use any calculator. The math will not cover those risks.