Astronomers estimate that new stars form in our galaxy at the rate of about

1 Star = 3 * (Mass of the Sun)

Explanation:

The quantity at which the speed of formation of the star depends is called the "star formation rate". Astronomers estimate that in our Galaxy the star formation rate is about 3 solar masses per year According to "solar mass per year" the mass of interstellar gas and dust related to about 3 times the mass of the Sun goes into stars each year). However, the whole of the mass doesn't necessarily go in the formation of 1 star.