Rounding Calculator
Round numbers by decimal places, significant figures, or nearest multiple
Number & Options
Results
Enter a number to see results
About Rounding
Rounding Methods
- Round: nearest value (0.5 rounds up)
- Floor: largest integer ≤ number
- Ceiling: smallest integer ≥ number
- Truncate: remove decimal part (towards zero)
Significant Figures
Significant figures indicate the precision of a measurement. Leading zeros are not significant. 3.14159 rounded to 3 sig figs = 3.14. 0.00456 to 2 sig figs = 0.0046.