🎯 Rounding Calculator
Enter a number and choose how to round it. Useful for homework, prices and measurements.
Rounded number
How the Rounding Calculator works
Standard rounding looks at the next digit: 5 or more rounds up, less than 5 rounds down. "Up" and "down" always move in one direction.
Round to d places: round(x × 10^d) ÷ 10^d
Nearest 10: round(x ÷ 10) × 10
Step-by-step calculation
- 1Enter the number.
- 2Choose the place to round to.
- 3Choose the rounding method.
Worked example
3.14159 rounded to 2 decimal places is 3.14; 1,567 to the nearest hundred is 1,600.
Why use a Rounding Calculator?
Round numbers correctly for homework, money and reports.
Important factors that can affect your results
- Half-up vs banker's rounding.
- Rounding too early in a calculation.
- Negative numbers.
Frequently asked questions
How is 2.5 rounded?
With standard "half up" rounding, 2.5 becomes 3. Some software uses "banker's rounding" and gives 2.
What are significant figures?
They count meaningful digits from the first non-zero digit. Use Scientific Notation for that.
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Last reviewed November 2026 · How we build and check our tools · Report a problem