Four calculators, one per path. Pick the one that matches your situation.
The four calculators
7-OH / MGM-15 / pseudoindoxyl
The kratom-derived synthetics share the same percentage-taper math, so they live in one calculator with a substance picker. Defaults differ per compound — 7-OH runs short and ends at a low jump-off; MGM-15 / MIT-A and pseudoindoxyl need slower runways because of longer half-lives.
Buprenorphine (Suboxone)
Buprenorphine taper, with the published 5 / 7 / 10 / 14 / 21-day rapid-taper schedules from Suboxone Rapid Taper built in. Falls back to percentage math for non-standard start doses, and extends the tail with volumetric sub-0.25 mg doses when the jump-off is set lower.
Kratom leaf
Kratom leaf taper in grams. Defaults to a 1 g/day jump-off rather than zero — the cliff between “low dose” and “no dose” is where most self-managed leaf tapers struggle, and ending at a tolerable low number tends to work better than crashing to zero. Adjust based on where you actually find that cliff.
SR-17 cross-taper
The SR-17 protocol is structurally different from the rest — it’s a cross-taper, not a single-substance taper. You preload SR while staying on 7-OH (or MGM-15 / MIT-A / pseudo), step the 7-OH to zero with SR carrying you, hold on SR-only, then taper the SR down. The calculator has four configurable phases plus an optional allergy-test day. See the SR-17 page for the full protocol before running the math.
What the calculators don’t do
- Take your medical history into account. Cardiovascular conditions, mental-health history, concurrent medications, and polysubstance use all change what a workable taper looks like. The calculator can’t know about any of it.
- Account for varying alkaloid content. Kratom leaf in grams is an approximation. Concentrated 7-OH products vary in actual content per tablet. The output is only as good as the product testing you have.
- Replace a check-in person. Most rapid tapers and community step-downs go better with someone knowing what you’re doing — sponsor, peer, or someone who can reach you.
- Tell you when to abort. If symptoms become unmanageable, the right move is to stabilize at a higher dose for a day or two and restart on a slower schedule. The Suboxone Rapid Taper page covers the abort-and-stabilize discipline.
Crisis and emergency
If you’re in crisis or symptoms are unmanageable, 988 (Suicide & Crisis Lifeline) and your prescriber are the right addresses. See Crisis Hotlines for the full list.