How many beats does a quarter note represent in 4/4 time?

In 4/4 time, a quarter note represents one beat. This time signature indicates that there are four beats in each measure, with the quarter note being the standard unit of measurement for each beat. The counting in 4/4 time typically goes like this: 1, 2, 3, 4, where each number corresponds to one quarter note. Therefore, in any measure of 4/4, a quarter note would fill one of those beats, providing a clear rhythmic foundation for the music. This aspect of musical notation is crucial for both performers and composers to establish timing and rhythm in music.