Best calf workout

The best calf workout is to walk up the stairs without skipping a step. I stay at the highest floor in hostel which is the 4th floor (G, 1, 2 ,3 4) and I feel my calves burning walking up the stairs. Another way to workout your calves is to walk fast to class. This also works out your calves. But going up the stairs a few times a day really makes my calves less flabby and it's hard. Haha. If you skip steps, you will workout your thighs, which is also a good thing and it saves time but I don't have that much energy to skip steps because I go fast and I will be out of breath.