Significant Figures Calculator
Round any number to a specified number of significant figures. Also shows the original sig fig count and scientific notation.
How to Use the Significant Figures Calculator
- Enter the number you want to round.
- Enter the desired number of significant figures.
- Click Round to see the result and scientific notation.
快速参考
| 从 | 到 |
|---|---|
| 123456 → 3 sf | 123000 |
| 0.004567 → 2 sf | 0.0046 |
| 9.876 → 2 sf | 9.9 |
| 100.5 → 3 sf | 101 |
| 0.0120 → 2 sf | 0.012 |
使用场景
- •Rounding lab measurements to proper sig figs.
- •Formatting scientific data for publications.
- •Checking sig fig rules in chemistry and physics.
公式
Round to N significant figures using toPrecision(N). Scientific notation: a × 10^b where 1 ≤ |a| < 10.
常见问题
What are significant figures?
The meaningful digits in a number that contribute to its precision, excluding leading zeros.
How do trailing zeros count?
Trailing zeros after a decimal point are significant. Trailing zeros in whole numbers may or may not be.
Why is this important?
Significant figures communicate the precision of a measurement in science and engineering.