We calculate accepted shots = ceil(final seconds / shot seconds), then planning credits = accepted shots × attempts per shot × billed seconds per shot × credits per generated second. The attempts figure is an average planning factor, not an instruction to perform fractional generations. Actual invoiced counts depend on vendor billing rules.
The tool assumes uniform billed shot length and zero rights, editing, labor, subscription-proration, taxes, or finishing charges. The optional draft-to-final comparison adds two user-entered generation stages and does not assume a draft guarantees final acceptance. Input must be changed to match the service you intend to use. A shortfall is not a recommendation to purchase any particular subscription. For plan comparisons, first check the current provider's rules for included credits, purchased credits, expiration, and billing cycle.