Online Abacus Calculator
Interactive virtual abacus for learning mental math and traditional calculation methods. Click the beads to perform calculations just like a real abacus.
Virtual Abacus
Current Value: 0
How to Use
Upper Beads (Red)
Each represents 5 units in its position
Lower Beads (Blue/Yellow)
Each represents 1 unit in its position
Instructions
- Click beads to move them
- Active beads count toward the total
- Each column represents a decimal place
- Use Reset to clear all beads
Abacus Facts
- • Used for over 2,000 years
- • Still taught in many schools today
- • Improves mental calculation skills
- • The word comes from Greek "abax"
- • Japanese version called "Soroban"
- • Chinese version called "Suanpan"
Frequently Asked Questions
How do I use the online abacus?
Click on the beads to move them towards or away from the center divider. Active beads (those moved toward the center) count toward the total value. Each column represents a decimal place, from billions on the left to ones on the right.
What is the difference between upper and lower beads?
Upper beads (red) are "heaven beads" and each represents 5 units in its decimal position. Lower beads (blue/yellow) are "earth beads" and each represents 1 unit in its decimal position.
Why learn to use an abacus?
Learning the abacus improves mental calculation skills, enhances concentration, and provides a deeper understanding of number relationships. Many students find it helps with math anxiety and builds confidence with numbers.
Can I perform addition and subtraction?
Yes! Start with one number on the abacus, then add or remove beads to perform calculations. For subtraction, remove the appropriate beads. For addition, add more beads to increase the value.