The time it takes to fully inflate an inflatable pool depends on various factors, such as the size of the pool, the method used for inflation, and the individual's effort. With a manual pump, it can take anywhere from 10 to 30 minutes to inflate a small to medium-sized pool. Using an electric air pump can significantly reduce the inflation time to around 5 to 10 minutes. However, these time estimates may vary, so it is best to refer to the manufacturer's guidelines for a more accurate estimation.