面积单位换算器

概述

本参考页面提供了常见面积单位之间转换的换算系数和工具rea units used in engineering, construction, land surveying, and manufacturing. Area is a two-dimensional quantity ($\text{length}^2$), so all conversion factors are squared versions of their linear counterparts.

保留原始来源文本："Engineering ToolBox — 工程技术应用的设计与工程资源、工具和基础信息！"ion for Engineering and Design of Technical Applications!" Original heading preserved: "Convert between units of area." Original calculator description preserved: "This calculator can used to convert between commonly used area units."

关键公式

要将面积值从一个单位转换到另一个单位，请乘以适当的系数：

$A_{\text{target}} = A_{\text{source}} \times \frac{\text{source unit in m}^2}{\text{target unit in m}^2}$

例如，将平方英尺转换为平方米：

$A_{\text{m}^2} = A_{\text{ft}^2} \times 0.09290$

对于圆形面积，基本单位换算在以下情况后应用：

$A = \frac{\pi d^2}{4}$

变量

Conversion Factors

Quick-Reference Pairs

Area Conversion Calculator

Use the table above to find the correct conversion factor. Enter your source area as the input, and the factor that multiplies it to reach the target unit.

For instance, to convert 100 ft² to m², enter 100 for the area and 0.09290 for the factor.

还原的原始源表

以下表格还原自原始来源页面，以保留完整的参考数据。

工程要点

• Squared relationship: A common mistake is using linear conversion factors for area. Since area is length × length, you must square the linear factor. For example, $1 \text{ in} = 25.4 \text{ mm}$, but $1 \text{ in}^2 = 645.16 \text{ mm}^2$, not $25.4 \text{ mm}^2$.
• Precision in design: For structural and architectural drawings, conversions should maintain at least four significant figures. Rounding too early can cause misalignment or material shortages.
• Land surveying: In the US, land areas are commonly reported in acres. Internationally, hectares are standard. One acre equals approximately 0.4047 hectares or 43,560 ft².
• Metric prefixes: Note that the prefix applies to the base length, not the area. One square kilometer is $(1000 \text{ m})^2 = 1{,}000{,}000 \text{ m}^2$, not $1000 \text{ m}^2$.
• Barns: The barn ($10^{-28} \text{ m}^2$) is a unit used in nuclear and particle physics to express cross-sectional areas of atomic nuclei.
• Always document your conversion factors in calculations for traceability, especially in regulated industries or formal submittals.

参考资料

• Original Source — Engineering ToolBox Area Units Converter