常用单位换算

长度
 1 in. = 0.0254 m
1 m = 39.3701 in.
1 m = 3.2808 ft
1 in. = 25.4 mm
1 ft = 304.8 mm
1 mm = 0.03937 in.
扭力
 1 kgm = 9.8067 Nm
1 ft lb = 1.3558 Nm
1 in.lb = 0.1130 Nm
1 Nm = 0.1020 kgm
1 Nm = 0.7376 ft lb
1 ft-lb = 13.83 kgf-cm
1 ft-lb = 0.138 kgf-m 
流量 
1 m3/min = 16.6667 l/s
1 cfm = 0.4720 l/s
1 cfm = 7.13 scfm
1 m3/h = 0.2778 l/s
1 l/s = 2.1189 cfm
1 m3/min = 35.35 scfm
1 cfm = 28.32 l/min
压力
1 bar = 100 kPa
1 kg/cm2(at) = 988.0668 Kpa
1 psi = 6.8948 kpa
1 kpa = 0.154 psi
1 kpa = 0.01 bar
1kpa = 0.0101972 kg/cm2
功率
1 kgm/s = 9.8067 w
1 hp = 745.7 w
1 kw = 101.972 kgm/s
1 kw = 103410 hp
重量
1 lb = 0.4536 kg
1 kg = 2.2046 lb