英制——公制                        公制——英制

长度

1 in = 25.4 mm

1 mm = .03937 in

1 ft = .3048 m

1 m = 3.281 ft

力

1 lb = 4.448 N

1 N = 0.2248 lb

力矩

1 ft-lb = 1.356 N-m

1 N-m = .7376 ft-lb

1 in-lb = .113 N-m

1 N-m = 8.851 in-lb

1 in-oz = 72.01 gf-cm

1 gf-cm = .01389 in-oz

重量

1 lb = .4536 kg

1 kg = 2.205 lb

1 oz = 28.35 g

1 g = .03527 oz

压力/应力

1 psi = 6895 Pa (N/m 2)

1 Pa = .000145 psi

1 ksi = 6.895 MPa (N/mm 2 )

1 MPa = .145 ksi

温度

(°F -32 ) /1.8 = °C

1.8 x °C + 32 = °F