According to the most recent measurements and calculations by scientists, the universe is estimated to be 13.787 ± 0.020 billion years old.

This age is determined through various methods, including:

* Cosmic Microwave Background (CMB): The faint afterglow of the Big Bang, which provides a snapshot of the universe when it was only about 380,000 years old.

* Hubble Constant: The rate at which the universe is expanding, which can be used to estimate the age of the universe based on how long it has been expanding.

* Supernovae: Exploding stars that act as "standard candles" and allow scientists to measure distances in the universe.

While the age of the universe is quite well established, there is still some uncertainty due to limitations in our understanding of certain cosmological parameters and the ongoing refinement of measurement techniques.