Return-to-player (RTP) calculation methods are used to determine the percentage of wagered money that a gambling game, like a slot machine or casino game, is expected to return to players over time. This calculation involves analyzing the game's design, including the odds of winning various outcomes, the frequency of those outcomes, and the payout amounts. By simulating numerous game rounds or mathematically modeling the game mechanics, operators can estimate the RTP, which helps maintain fairness and transparency in gaming.