Rounding & Decimal Precision Tool
Master rounding rules with visual number line demonstrations
Single Number Rounding
This tool is provided for educational purposes. Always verify critical calculations independently.
Bulk Rounding
Understanding Rounding
Rounding Modes Explained
- Half Up: Round 0.5 and above up (e.g., 2.5 → 3)
- Half Even: Round 0.5 to nearest even number (reduces bias)
- Ceiling: Always round up toward positive infinity
- Floor: Always round down toward negative infinity
- Truncate: Remove decimals without rounding
Common Applications
- Financial calculations (use Half Even to reduce bias)
- Scientific measurements (significant figures)
- Grade calculations and test scores
- Statistical analysis and data reporting