According to current scientific understanding, the age of the universe is approximately 13.8 billion years. This value is based on measurements and observations of the cosmic microwave background radiation, the rate of expansion of the universe, and other cosmological data. It is important to note that the age of the universe represents the time that has passed since the Big Bang, which is considered the origin of our universe as we know it. However, our understanding of the earliest moments of the universe's existence is still an active area of research and subject to ongoing scientific investigation.