Rounding Calculator
Round numbers to decimal places, significant figures, or nearest values. Get precise results with clear explanations.
Rounding Calculator
About Rounding Numbers
Rounding is the process of replacing a number with an approximate value that is shorter, simpler, or more explicit. It's essential in many fields including mathematics, science, engineering, and finance.
Rounding Rules
- Round Half Up: 0.5 rounds up to 1 (most common)
- Round Half Down: 0.5 rounds down to 0
- Round Half to Even: 0.5 rounds to nearest even number
- Round Half Away from Zero: Always round 0.5 away from zero
Types of Rounding
- Decimal Places: Round to a specific number of digits after decimal
- Significant Figures: Round to a specific number of meaningful digits
- Nearest Value: Round to nearest multiple of a given number
- Place Value: Round to nearest ten, hundred, thousand, etc.
Applications
- Financial calculations and currency
- Scientific measurements and data
- Statistical analysis and reporting
- Engineering tolerances and specifications
- Everyday calculations and estimates
Examples
- 3.14159 rounded to 2 decimal places = 3.14
- 1234.56 rounded to 3 significant figures = 1230
- 127 rounded to nearest 10 = 130
- $4.67 rounded to nearest dollar = $5