Conversion Factors

Quanity From English Units To Metric Units Multiply By
Length mile
yard
foot
foot
inch
km
m
m
mm
mm
1.609 344
0.914 4
0.304 8
304.8
25.4
Area square mile
acre
square yard
square foot
square inch
km²
ha (10 000 m²)


mm²
2.590
0.404 685 6
0.836 127 36
0.092 903 04
645.16
Volume cubic yard
cubic foot
cubic foot
gallon
cubic inch


L (1000 cm³)
L (1000 cm³)
mm³
0.764 555
0.028 316 8
28.316 85
3.785 41
16 387.064
Mass lb
ton (2000 lb)
kg
metric ton (1000 kg)
0.453 592
0.907 184
Force lb N 4.448 22
Pressure, stress psi kPa 6.894 76
Torque in-lb
ft-lb
N·m
N·m
0.112 98
1.355 82
NOTE: Underline denotes exact number