Measure the height from the floor to the bar. Remember you will want to have at least 12 inches between the seat and the bottom of the bar or table it is going to fit underneath.
Transfer the measurements to the legs of the bar stool. Mark where the cuts will be with a pencil.
Cut across the marks with the saw. Check to see if the bar stool is level. If it is not, you can sand the portion that is not level.