How many gods do Christians believe in?
Christianity is a monotheistic religion, meaning that there is only one god to be worshipped.
All other claims to deity or other “gods” are never presumed to be a competing god, but are presumed to be created beings or objects not worthy of worship.
Christians believe that the nature of God consists of three persons, God the Father, God the Son, and God the Holy Spirit. Each is fully God, and each is not the other.
It should come at no surprise that humans have trouble grasping the concept of the trinity, since we are created beings and limited in our ability to understand everything, especially the nature of the creator of all things including space and time.