有效数字计算器
计数和四舍五入有效数字。科学计算和实验室工作的必备工具。
Supports decimals and scientific notation (e.g., 1.23e-4)
Significant Figures
3
0not
.
0not
0not
4sig
5sig
0sig
Significant Not Significant
- 0Leading zero - not significant
- 0Leading zero - not significant
- 0Leading zero - not significant
- 4Non-zero digit - significant
- 5Non-zero digit - significant
- 0Trailing zero after decimal - significant
sig figs
Rounded value
0.00450
Scientific Notation
4.50e-3
Numeric Value
0.0045
Non-zero digits1234
4 SFCaptive zeros1002
4 SFLeading zeros0.0045
2 SFTrailing zeros with decimal2.500
4 SFTrailing zeros without decimal1200
2 SFCalculation Rules
- Multiplication/Division: Result has same SF as least precise input
- Addition/Subtraction: Result has same decimal places as least precise input
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