This paper presents a solution to a common issue associated with household LPG gas usage. With increasingly busy lifestyles, monitoring the gas level in cylinders and scheduling timely refills typically becomes difficult. To address this challenge, an IoT-based Smart LPG Gas Monitoring and Automatic Booking System is proposed. Given the high demand for LPG in daily life, the system enables continuous monitoring of gas consumption and provides timely alerts. When the gas flow reaches a predefined threshold, the system sends an alert notification to the user through an IoT-based application. Additionally, the system automates the booking of a new cylinder, enhancing user convenience. A flow sensor is used to measure the amount of gas consumed, while the MQ-4 gas sensor detects any potential gas leakage. Upon detecting a leak, the MQ-4 sensor sends an analog signal to the ESP32 microcontroller, which in turn communicates with the cloud platform to notify the user through the IoT app. This system not only streamlines gas management but also ensures household safety. Given that LPG is highly flammable, timely detection of leaks is crucial to prevent accidents, property damage, or loss of life. By integrating monitoring, alerting, and automated booking, the proposed solution provides an effective, reliable, and secure approach to domestic gas management.