The number of roulette wheel spins per hour can vary depending on the casino, the speed of the dealer, and the number of players at the table. On average, a roulette wheel spins approximately 30-40 times per hour. This can be affected by factors such as the dealer's experience, how quickly players place their bets, and any delays due to payouts or disputes. In online roulette, the spin rate tends to be faster due to the absence of physical processes, potentially reaching 50-60 spins per hour.