计算矩形、正方形、圆形、三角形、梯形、平行四边形、椭圆、扇形和菱形的面积与周长
这款免费面积计算器支持九种常见几何图形——矩形、正方形、圆形、三角形、梯形、平行四边形、椭圆、圆形扇形和菱形。选择图形,输入尺寸,实时获取面积和周长(如适用),并显示公式和计算步骤,帮助您理解每一步。
Calculator
Basic calculator for mathematical operations
Average Calculator
Calculate the average of a set of numbers
Area Calculator
Calculate area and perimeter for 9 shapes — rectangle, circle, triangle, trapezoid, ellipse & more
GST Calculator
Calculate GST, add or remove tax from prices
Unit Converter
Convert between different units of measurement
Percentage Calculator
Calculate percentages and percentage changes