One mile is roughly equivalent to 52 flights of stairs. However, climbing stairs provides twice the amount of exercise as flat-surface walking does. Slowly ascending stairs burns two to three times as many calories in the same amount of time as swiftly walking on a flat area.
A mile of walking contains roughly 2,000 steps. There are 10 steps in a typical flight of stairs. Walking 38 paces on a flat surface is roughly equivalent to climbing a flight of stairs because climbing demands more energy.
According to a Harvard research, males who climbed an average of eight flights of stairs per day lived longer than those who walked an average of 1.3 miles each day.