Measure from the floor to the bottom of the countertop. Write the measurement on a piece of paper.
Subtract 8 to 12 inches from the floor-to-countertop measurement to allow for leg room. For less legroom opt for 8 inches and for the most opt for 12. Choose 10 inches for a normal legroom range.
Determine whether you require a counter-height, bar-height or extra-tall bar stool using your measurements. A counter stool normally ranges from 24 to 26 inches in seat height. A regular bar stool measures from 29 to 31 inches in seat height and an extra-tall bar stool measures 34 to 36 inches in seat height.