Rounding Calculator

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Round numbers to a specified number of decimal places using round, floor, or ceil.

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About Rounding Calculator

Enter one or more numbers (one per line) and round them to your chosen precision using standard rounding, floor (round down), or ceil (round up). Supports 0 to 4 decimal places. Useful for financial calculations, data formatting, and mathematical operations.

How to use

  1. Enter one number per line in the input panel.
  2. Choose the number of decimal places and rounding method.
  3. The rounded results appear instantly in the output panel.

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Frequently Asked Questions

FAQs about Rounding Calculator

What is the difference between round, floor, and ceil?

Round rounds to the nearest value (0.5 rounds up). Floor always rounds toward negative infinity (always down). Ceil always rounds toward positive infinity (always up).

Can I enter negative numbers?

Yes. Negative numbers are handled correctly for all three methods.

Can I process multiple numbers at once?

Yes. Enter one number per line and all numbers will be rounded using the same settings.

What happens with non-numeric input?

Lines that cannot be parsed as numbers are returned as-is with a note that they are invalid.

Is my data safe?

All calculation runs in your browser. No data is sent to any server.