免费 · 教育与科学
有效数字计算器.
统计有效数字，按指定位数修约，并按有效数字规则进行运算。
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使用方法: 有效数字计算器
输入数据或选择文件，调整设置并生成结果。复制或下载之前，请检查结果。
限制与支持格式
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英语技术说明
Trailing zeros in whole numbers without a decimal point are reported as ambiguous. Rounding is half away from zero. Everything is calculated in your browser; nothing you type is uploaded.
Counting follows the standard rules. Rounding works on the decimal digits rather than binary floating point. Multiplication and division keep the fewest significant figures; addition and subtraction keep the fewest decimal places.
0.004560 has 4 significant figures and rounds to 0.0046 at two; 3.14159 × 2.1 = 6.6.