Can You Cast the I Ching Online? Does It Count?
Does an online I Ching cast 'count'? What a faithful digital cast must preserve, what changes, and why an auditable online cast can be more rigorous than coins on a table.
A fair question
“Can tapping a screen really count the same as tossing coins or dividing yarrow stalks by hand?” Nearly everyone who moves from physical to online casting asks it. Answering well means deciding first: in this method, what is the essence, and what is merely the vehicle?
What the tradition actually cares about is the numbers
Go back to the methods themselves. The essence of the coin method is that four line values appear with probabilities 1/8, 3/8, 3/8, 1/8; the essence of the yarrow stalk method's eighteen operations is the asymmetric distribution they manufacture — 1/16, 5/16, 7/16, 3/16. Coins and stalks are instruments for realizing those probabilities, not the probabilities themselves. A faithful digital cast must preserve that distribution exactly — ours does, and writes every draw into an inspectable computation trace; see the math page. The randomness source is a cryptographic-grade CSPRNG, less predictable than any coin leaving a human hand.
What online casting adds: auditability
Coins tossed on a table can't be replayed — you can only trust that you counted right. An online cast keeps every step — each toss, each division's remainder, each modulus — in the trace, reviewable afterwards and verifiable by anyone else. On the question of procedural rigor, online casting isn't a compromise; it's the stricter of the two.
What you genuinely lose
Honestly: the texture of time. Dividing yarrow stalks through eighteen operations takes the better part of half an hour, and that sustained attention itself lets the question settle; clicking a button takes a second. But that value belongs to the ritual of attention, not to the mathematics — and it can be recovered deliberately: write the question down with care before casting (see how to ask), read the judgment, moving line, and changed hexagram in full afterwards, and leave a one-sentence reflection. When the classical tradition insisted that consultation requires cheng — sincerity — it always meant the state of the mind, never the props in the hand.
The verdict
If you hold that the method's value lives in the numbers and the text — which is exactly our position — then an online cast that preserves the probabilities faithfully and stays auditable end to end counts, fully. And if some evening you want the half-hour ritual, the yarrow stalks are still there; the two have never excluded each other.