A quarter note typically receives 1 beat in common time. When you add a dot to a note, it increases the duration of the note by half of its original value.
So, for a quarter note:
- Original value: 1 beat
- Half of the original value: 0.5 beats
Adding these together: 1 beat + 0.5 beats = 1.5 beats
Therefore, a quarter note with a dot is worth one-and-a-half beats.