Rounding and Significant Figures
Round a number or a list by decimal places or significant figures, and state the rule.
One number per line, up to 200. Halves round away from zero: 2.5 becomes 3 and -2.5 becomes -3.
Your result
Enter at least one number.
How to use it
- Choose places or significant figures.
- Enter the count and the numbers, one on each line.
- Read the result.
Examples
- 1.25 to one placePlaces 1 and the number 1.25. 1.3.
- 1.5 to a whole numberPlaces 0 and the number 1.5. 2.
- Three significant figuresSignificant 3 and the number 12345. 12300. The number 0.012345 becomes 0.0123.
Tool details and privacy
Rounding is half up and away from zero. 1.5 to zero places becomes 2. Significant figures keep the first non-zero digits.
Places are from 0 to 8. Significant figures are from 1 to 8. More than 12 digits before the decimal point is rejected.
Options
- Each number is on its own line. The limit is 200. Zero significant figures is rejected because the count starts at 1.
Limits
- Amounts use two decimal places and up to 12 digits before the decimal point. Rounding is half up.
- 1,250 is rejected. Write 1250 or 1250.50.
- Significant figures are from 1 to 8. Decimal places are from 0 to 8.
Privacy
The numbers are calculated in your browser and are not sent to any server.
Questions
How does 1.25 round to one place?
1.3, half up.
And 1.5 to a whole number?
2.
What is 12345 to three significant figures?
12300. And 999 to two significant figures becomes 1000.
Is 0 significant figures accepted?
No. From 1 to 8.