If this tool helped you, you can buy us a coffee ☕
科学计数法与普通数字互转,支持精度自定义。
Supports positive/negative decimals, integers, and scientific notation with e/E (e.g., 1.23e5).
Set the number of significant figures for the coefficient, range 1 to 16.
Standard scientific notation expresses numbers as a × 10ⁿ, where 1 ≤ |a| < 10.
Engineering notation always uses exponents that are multiples of 3, simplifying conversions with units like kilo, mega, nano.
E-notation (e.g., 1.23e+5) is common in programming, Excel, etc., for easy copy-pasting.

Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Scientific Calculator
Advanced scientific calculator supporting complex math operations and function calculations.

Target Heart Rate Calculator
Calculate your personalized target heart rate zone based on age, resting heart rate, and fitness level to scientifically guide your workout intensity.

Maximum Heart Rate (MHR) Calculator
Calculate your maximum heart rate using multiple scientific formulas to help fitness enthusiasts create effective training plans and identify safe target heart rate zones.

Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Scientific Calculator
Advanced scientific calculator supporting complex math operations and function calculations.

Target Heart Rate Calculator
Calculate your personalized target heart rate zone based on age, resting heart rate, and fitness level to scientifically guide your workout intensity.

Maximum Heart Rate (MHR) Calculator
Calculate your maximum heart rate using multiple scientific formulas to help fitness enthusiasts create effective training plans and identify safe target heart rate zones.

Inverse Trigonometric Function Calculator
Accurately calculate radian values for inverse trig functions like arcsin and arccos. Supports 6 function types and custom decimal precision.
在处理极大或极小的数字时,手动进行科学计数法与普通数字的转换既耗时又容易出错。本工具可帮助您快速实现科学记数法(如1.23e5)与常规十进制数字(如123000)之间的相互转换,并支持自定义有效数字位数,确保结果既精确又符合使用习惯。
输入的数字请使用半角数字与小数点,科学记数法格式如 1.2e10 或 5.67E-8。不支持包含逗号或其他分隔符的数字。对于超过15位精度的超大数字,JavaScript 数值表示可能引起精度损失,建议用于常规计算场景。本工具为纯前端运行,您的输入数据不会被上传到服务器,请放心使用。
在工程与科学计算中,科学记数法常用于简化数据展示。例如,光速约为 2.99792458e8 m/s,普朗克常数约为 6.62607015e-34 J·s。建议在数据处理时统一采用科学记数法以保持一致性,并结合本工具进行格式校验。如果需要将多个数值批量转换,可逐个输入或复制到表格处理软件中辅助使用。