Rounding Calculator
Calculate rounding instantly in your browser.
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What this tool does
Calculate rounding instantly in your browser. Ties round half up (away from zero for the magnitude shown in most school contexts); financial rounding rules such as banker's rounding are not applied.
How to use the Rounding Calculator
- Enter or select number to round.
- Enter or select round to.
- Enter or select decimal places.
- Enter or select significant figures.
- Enter or select nearest multiple of.
- Read the calculated result; change any measurement to compare alternatives.
Formula
Round half up at the chosen precision: decimal places count digits after the point, significant figures count digits that carry meaning from the first nonzero digit, and nearest-multiple rounding snaps to a grid such as the nearest 100.
- x
- Number to round
- mode
- Round to
- places
- Decimal places
- figs
- Significant figures
- multiple
- Nearest multiple of
Ties round half up (away from zero for the magnitude shown in most school contexts); financial rounding rules such as banker's rounding are not applied.
Worked example
For rounding calculator, the following measurements illustrate the exact method: Number to round: 1234.5678; Round to: places; Decimal places: 2; Significant figures: 3; Nearest multiple of: 100.
Inputs
- Number to round1234.5678
- Round toDecimal places
- Decimal places2
- Significant figures3
- Nearest multiple of100
Result
- Rounded value1,234.57
- Decimal places2
Results explained
- Rounded value
- Rounded value from the formula above. Ties round half up (away from zero for the magnitude shown in most school contexts); financial rounding rules such as banker's rounding are not applied.
- Decimal places
- Decimal places from the formula above. Ties round half up (away from zero for the magnitude shown in most school contexts); financial rounding rules such as banker's rounding are not applied.
Frequently asked questions
Round half up at the chosen precision: decimal places count digits after the point, significant figures count digits that carry meaning from the first nonzero digit, and nearest-multiple rounding snaps to a grid such as the nearest 100.
Ties round half up (away from zero for the magnitude shown in most school contexts); financial rounding rules such as banker's rounding are not applied.
Where mathematically meaningful, yes. Fields specify permitted ranges and undefined operations display an error.
Exact integer calculations use safe integers; decimal calculations use browser floating point, so small rounding differences can occur.
All values remain in your browser and are never uploaded.