How it works
Rounding replaces a value with a simpler approximation. Choose precision (tenths through millions), a fraction unit (1/8, …), or significant figures, then pick a rounding mode.
round(value × 10^p) / 10^p · or nearest k/n
When to use
Use this tool when you need to: start with Precision for tenths/ones/tens. Use Fractions for ⅛-style rounding, and Settings-style modes for how halfway values are resolved.
How to use this tool
- Enter your values in the fields above.
- Review the formula and any mode options for your problem.
- Read the result and the step-by-step solution.
Start with Precision for tenths/ones/tens. Use Fractions for ⅛-style rounding, and Settings-style modes for how halfway values are resolved.
Frequently asked questions
- What is the Rounding Calculator?
- Rounding replaces a value with a simpler approximation. Choose precision (tenths through millions), a fraction unit (1/8, …), or significant figures, then pick a rounding mode.
- How do I use the Rounding Calculator?
- Enter the required values, then calculate. The Rounding Calculator shows results, formulas, and step-by-step work when available. No account is required.
- What formula does the Rounding Calculator use?
- round(value × 10^p) / 10^p · or nearest k/n
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