1 in = 25.4 mm

1 ft = 0.3048 m

1 mile = 1609.3 m

1 micron =10-6 m

1 lb = 453.6

1 cwt = 50.8 Kg

1 ton(imp) = 1016 Kg

1 top(up) = 907.2 Kg

1 tonne = 1000 Kg

1 inlb = 0.113  Nm

1 ftlb = 1.356  Nm

1 kgm = 9.807 Nm

1 ft poundal = 0.0421 Nm

(º F- 32) x 5/9  =    º C

  K-273.15  =   º C

1 lbft = 1.356 J

1 Nm   =  1 J

1 kgm = 9.807 J

1 kW/hr = 3.6  MJ

1 in2  =  6.45 cm2

1   ft2 = 0.093 m2

1 psi = 6.89 kPa

1 kgf/cm2 = 98.07 kPa

1 bar = 100 kPa

1 bar = 14.5 psi

1 atmosphere = 98.1 kPa

1"(STANDARD) = 101.33 kPa

1 cm water = 97.89Pa

1 in water = 248.64 Pa

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 = 33.33 ft water

1litre = 0.001 m3

1 cu.ft. =  0.0283  m3

1 cu.in.= 16.39 cm3

1 gal(imp)  =  4.546   L

1 gal(us)   =  3.79   L

1 fluid oz.(imp) = 28.41 mL

1 fluid oz.(us) = 29.57 mL

1 lbf = 4.45 N

1kgf = 9.81 N

1 kp(kilopond) = 9.81 N

1 poundal = 138.3 mN

1 ton force = 9.964 kM

1 lbft/sec = 1.356 W

1 kgm/sec = 9.807 W

1Nm/sec = 1 W

1 Nm/sec = 1 W

1 Joule/sec = 1 W

1 H.P.(imp) = 745.7 W

Cv值：水流量(US  gal/min)于60º F下，流经差压为1psi之阀门而所得出之流量定值。（ Cv  X 1000=l/min )

kv值：水流量 (L/ min)于20º F下，流经差压为1kgf/cm2之阀门而所得出之流量定值。

KV值: 水流量 (m3/ min)于20º F下，流经差压为1kgf/cm2之阀门而所得出之流量定值。

S值：气动元件有效截面积（mm2)

CV = 1.17 KV         S = 18.45 CV

S.T.P = 标准温度及压力   （0 º C 及101.3 kPa绝对压力）

N.T.P = 正常温度及压力   （20 º C 及101.3 kPa绝对压力）

M.S.C = 公制标准情况     （15 º C 及101.3 kPa绝对压力）

ANR = 温度 ：20 °C及相对湿度：65%

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

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

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

1 ft lb = 0.13826 kgm = 1.356 Nm

1 L = 1000 cm3 = 1.7598 pint = 106 mm3

1 tonne = 1000 kg = 0.984 ton = 2205 lb

1 m3 = 106 cm3

1 cu ft/min = 0.0283 m3/min = 28.3 l/min

1 Pa = 1 N/m2

单   位

缩   写

单   位

缩   写

Pascal

Pa

Newton

N

metre

m

litre

L

Watt

W

Newton metre

Nm

Joule

J

Megajoule

MJ

° Kelvin

K