Online Abacus

A Soroban abacus has vertical columns representing place values (ones, tens, hundreds). Each column contains an upper bead worth 5 and lower beads worth 1.

Moving an upper bead down toward the beam adds 5. Moving a lower bead up toward the beam adds 1 per bead.

Abacus practice develops spatial visualization, speed mental math (Anzan), and strong foundational number sense.

Click the 'Reset / Clear' button to push all upper beads up and lower beads down to zero position.