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Online Abacus – Free Virtual Soroban

Practice setting numbers on a free online Japanese abacus. Use the board to explore place value, bead movement, and mental math patterns — no download or sign-up needed.

24px
Per-rod
Total
Light
—Score: 0Streak: 0
Sound
Vibration
Target: —
Abacus / Soroban Board
Total :
0
0
10M
0
1M
0
100k
0
10k
0
1000
0
100
0
10
0
1
0
.1
0
1e-2
0
1e-3
0
1e-4
0
1e-5
0
1e-6
0
1e-7

About this board

Layout: 1s in center • Right =.1, .01, … • Left =10, 100, 1000 …

Beads: upper bead = 5; each lower bead =1.

Tips: Shift + click fills a column • ←/→ select rod • ↑/↓ change bead • 0–9 set digit • Ctrl/Cmd + 0 zero.

How to Use the Online Soroban

  • Click or tap an earth bead (below the bar) to move it up to the bar; each one is worth 1.
  • Click or tap the heaven bead (above the bar) to move it down; it is worth 5.
  • Each rod is one place value — ones, tens, hundreds — read from right to left.
  • Turn on the digit display to check the value of every rod while you learn, then turn it off to test yourself.
  • Use the practice controls to get random problems and set the answer on the board.

Practice Ideas

  • Set every number from 0 to 99 in order, then back down again.
  • Add 7 over and over starting from 0 to practise the big friends (10-complements).
  • Ask a partner to call out a number and race to set it correctly.

New to the abacus? Start with the Soroban techniques lesson, print the abacus manual and worksheets, or play the timed Soroban Challenge game.