How many seconds is a bar of music?

Answer 1

It depends on the tempo.

If a song has a fast tempo, there are less seconds in each bar. Contrarilly, if the tempo is slow, there are more seconds. Thanks to the above answer. Slow ballads have more time in a bar than a fast rock song.

On a side note - using garage band i constructed a song at: 120bpm with a 4/4 Signature. According to the timer the first measure = 2 seconds. Therefore a bar with 4 measures would be 8 Seconds(at 120bpm).

Answer 2

Well, it totally depends on the tempo of the music, 16 bars is 64 beats if it is in 4/4. just grab a stopwatch and time it if you want an exact answer.