How Rocket League rank boosting works
Rocket League ranks you separately in every competitive playlist — Solo Duel (1v1), Doubles (2v2) and Standard (3v3) each hold their own hidden MMR and their own rank, so climbing one does nothing for the others. Your booster plays the exact playlist you pick until the target rank is reached, and the calculator prices by how far apart your current and desired ranks sit, because each division is a step of hidden MMR and higher tiers take more wins to cross. Every division inside a tier (I through IV) fills as your MMR rises; clear Division IV and you promote to the next tier. There are no promotion series — your MMR carries you across the lines, and every match is visible in your dashboard.