输入计算
数学公式
广告
圆周长计算器
结果
Circle Perimeter
31.42 cm
| Input Radius | 5 cm |
|---|---|
| Calculated Diameter | 10 cm |
| Calculated Area | 78.54 cm² |
相关计算器
-
风筝周长计算器
使用这个风筝周长计算器轻松计算风筝的周长。输入边长以快速确定您的四边形周围的距离。为几何项目和风筝制作提供准确结果。
-
正方形周长计算器
使用这个正方形周长计算器轻松计算正方形的周长。输入边长，立即获得正方形边缘周围的总距离。
-
圆柱体积计算器
通过输入半径和高度轻松计算圆柱体积。使用这个免费在线工具，可以为任何尺寸的圆柱获得精确的立方厘米（cm³）结果。
-
Ellipse Area Calculator
Ellipse Area Calculator - Calculate the area, perimeter, and eccentricity of an ellipse easily. Enter the lengths of the semi-major and semi-minor axes to get precise results instantly.
-
Ellipse Circumference Calculator
Ellipse Circumference Calculator - Calculate the circumference, eccentricity, and area of an ellipse easily. Enter the lengths of the semi-major axis (a) and semi-minor axis (b) to get precise results instantly.
实用工具
-
秒表
使用这个在线秒表精准计时。轻松开始、停止和重置。
-
Countdown Timer
Free online countdown timer. Set hours, minutes, and seconds to count down easily. Simple, fast, and useful for work, study, or daily tasks.
-
Counter
Simple online counter tool. Increase, decrease, or reset numbers instantly. Set custom step values and limits with ease.