The dumbbell seated calf raise targets the soleus, the deep calf muscle that takes over when the knee is bent, by raising your heels with dumbbells resting on your knees. Because the gastrocnemius is slackened in the seated position, this variation is the practical way to grow the lower part of the calf. Lifters pair it with standing raises to train both calf muscles completely using only dumbbells and a bench.
Log your dumbbell seated calf raise sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.