The number most people quote is the sticker price times the wishlist count, and it is wrong by a factor of four or five. Every deduction below is real. Change any of them and watch what happens.
After the discount, regional pricing, refunds and tax, Valve's 70/30 split is applied last. Your platform share can improve at $10M and $50M of lifetime revenue, which is not a rounding error you need to model yet.
Steam Revenue & Runway Calculator: three scenarios, a nine-step revenue waterfall, an 18-month cash runway and break-even, 353 formulas cross-checked by an independent script. Excel and Google Sheets. $14.
See it on EtsyThis is an estimate, not a forecast. Conversion is the number that moves the result most and the one you control least — see how many wishlists you actually need.