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Calculators / Math / Rounding
Rounding calculator
Round a number to a selected decimal place using a scaling factor.
On this page
Rounded value123.46
Calculator controls
How to calculate
Round a number to a selected decimal place using a scaling factor.
Rounded value = floor(value*factor+0.5)/factor
Worked example
Number: 123.4567; Rounding factor (100 for 2 decimals): 100.
Rounded value: 123.46 .
Assumptions and limits
For negative halfway values, this simple method rounds toward zero. Financial and regulatory rounding conventions can differ.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Round a number to a selected decimal place using a scaling factor. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the rounding to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Number | Enter a number of at least -1000000000000 and no more than 1000000000000. |
| Rounding factor (100 for 2 decimals) | Enter a number of at least 0.000001 and no more than 1000000000000. |
Frequently asked questions
What should I check before using the rounding result?
For negative halfway values, this simple method rounds toward zero. Financial and regulatory rounding conventions can differ.
Is this rounding result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.