单位转换对照表

本文档提供代码内使用的单位转换对照表。转换按测量类型分类，包括长度、面积、体积等。

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Length

• mm = 1.0
• cm = 10.0
• m = 1000.0
• in = 25.4
• ft = 304.8
• ft-in (just for display, counted by inch) = 25.4

Area

• mm2 = 1.0
• cm2 = 100.0
• m2 = 1e6
• in2 = 645.16 (25.4 * 25.4)
• ft2 = 92903.04 (304.8 * 304.8)

Volume

• mm3 = 1.0
• cm3 = 1000.0
• m3 = 1e9
• in3 = 16387.064 (25.4^3)
• ft3 = 2.8316846592e7 (304.8^3)

Quadrant (4th Power)

• mm4 = 1.0
• cm4 = 10000.0
• m4 = 1e12
• in4 = 4.168181825e8 (25.4^4)
• ft4 = 8.6309748416e13 (304.8^4)

Warping Constant (6th Power)

• mm6 = 1.0
• cm6 = 1e6
• m6 = 1e18
• in6 = 1.06151147736e13 (25.4^6)
• ft6 = 2.483526870912e22 (304.8^6)

Cover Area

• mm2/m = 1.0
• cm2/m = 100.0
• m2/m = 1e6
• in2/in = 645.16 * 39.3700787
• in2/ft = 645.16 * 3.2808399
• ft2/ft = 92903.04 * 3.2808399

Weight

• g = 1.0
• kg = 1000.0
• t = 1e6
• lbs = 453.59237
• kip = 453592.37
• n = 1e3 / G
• dan = 1e4 / G
• kn = 1e6 / G
• lbf = 4448.2216152605 / G

Angle

• deg = π (System.Math.PI)
• rad = 180.0

Ratio

• ratio_decimal = 1.0
• % = 0.01
• ‰ = 0.001

Load

• kg/m = 1.0
• kg/cm = 100.0
• kg/mm = 1000.0
• t/m = 1e3
• t/cm = 1e5
• t/mm = 1e6
• n/m = 1.0 / G
• n/cm = 100.0 / G
• n/mm = 1000.0 / G
• kn/m = 1000.0 / G
• kn/cm = 1e5 / G
• kn/mm = 1e6 / G
• dan/m = 10.0 / G
• dan/cm = 1000.0 / G
• dan/mm = 10000.0 / G
• lbf/in = 4.4482216152605 * 39.3700787 / G
• lbf/ft = 4.4482216152605 * 3.2808399 / G
• kip/in = 453.59237 * 39.3700787
• kip/ft = 453.59237 * 3.2808399

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