2024年3月20日发(作者：)

常用的工程单位换算

长度单位 面积单位

1 in = 25.4 mm 1 in

2

= 6.45 cm

2

1 ft = 0.3048 m 1 ft

2

= 0.093 m

2

1 micron = 0.001 mm

体积单位

1 litre = 0.001 m3 1 . = 0.0283 m3

1 . = 16.39 cm3

1 fluid oz.(imp) = 28.41 mL

1 fluid oz.(us) = 29.57 mL

1 gal(imp) = 4.546 L

1 gal(us) = 3.79 L

温度单位

(°F-32)X5/9=℃ K-273.15 = ℃

功及能量单位

1 Nm = 1 J 1 kgm = 9.807 J

1 kW/hr = 3.6 MJ 1 lbft = 1.356 J

功率单位

1 Nm/sec = 1 W 1 lbft/sec = 1.356 W

1 kgm/sec = 9.807 W 1 Joule/sec = 1 W

1 H.P.(imp) = 745.7 W

质量单位

1 lb = 453.6 g 1 tonne = 1000 kg

1 ton(imp) = 1016 kg 1 ton(us) = 907.2 kg

流量计算公式

Q = Cv值 X 984 = Kv值 X 1100 Cv = So ÷ 18

力单位

1 kgf = 9.81 N 1 lbf = 4.45 N

1 kp(kilopound) = 9.81 N

1 poundal = 138.3 mN

1 ton force = 9.964 kM

力矩单位

1 kgm = 9.807 Nm 1 ft. poundal = 0.0421 Nm

1 in lb = 0.113 Nm 1 ft lb = 1.356 Nm

压力单位

1 psi = 6.89 kPa 1 kgf/cm2 = 98.07 kPa

1 bar = 100 kPa 1 bar = 14.5 psi

1 mm mercury = 133.3 Pa

1 in mercury = 3.39 kPa

1 Torr = 133.3 Pa 1 ft water = 0.0298 bar

1 bar = 3.33 ft water 1 atmosphere = 101.3 kPa

1 cm water = 97.89 Pa 1 in water = 248.64 Pa

换算表

1psi=6.895kPa=0.07kg/cm2=0.06895bar=0.0703atm

1standard atmosphere=14.7psi=101.3kPa=1.01325bar

1kgf/cm2 = 98.07kPa=14.22psi = 28.96ins mercury

1m3 = cm3