Four revenue lines, one honest model.
Concurrent viewers × a flat dollar constant ignores how Twitch revenue actually flows. The streamer's contract tier changes the math before any earnings calc.
Twitch streamers earn from at least four streams: subs, bits, ads, and sponsorships. A useful calculator has to model each one separately.
A tier-1 sub at $4.99/month returns roughly $2.50 to the streamer after Twitch's split. Bits convert at roughly $1 per 100. Ad revenue is CPM × ads-per-hour × stream-hours × the streamer's share.