Unit Conversion Factors

 
From 
English
To 
SI
Multiply by
CATEGORY
From 
SI
To 
English
Multiply by
ft
m
0.3048
Length
m
ft
3.2808
inch
mm
25.40
 
mm
inch
0.039
ft2
m2
0.0929
Area
m2
ft2
10.764
inch2
mm2
645.2
 
mm2
inch2
0.0015
ft3
m3
0.028
Volume
m3
ft3
35.714
inch3
mm3
16387
 
mm3
inch3
61x10-6
ft4
m4
0.0086
2nd Moment
m4
ft4
115856
inch4
mm4
416231
 of Area
mm4
inch4
2x10-6
lbm
kg
0.4536
Mass
kg
lbm
2.2046
lbm/ft3
kg/m3
16.02
Mass Density
kg/m3
lbm/ft3
0.062
lb
N
4.448
Force
N
lb
0.2248
kip
kN
4.448
 
kN
kip
0.2248
lbs/ft
N/m
14.59
Force/Unit
N/m
lbs/ft
0.0685
kips/ft
kN/m
14.59
Length
kN/m
kips/ft
0.0685
lbs/in2
kPa
6.895
Force/Unit
kPa
lbs/in2
0.145 
kips/in2
MPa
6.895
Area (Stress,
MPa
kips/in2
0.145
lbs/ft2
Pa
47.88
Pressure,
Pa
lbs/ft2
0.021
kips/ft2
kPa
47.88
Elastic Mod.)
kPa
kips/ft2
0.021
lbs/ft3
N/m3
157.1
Force/Unit
N/m3
lbs/ft3
0.0064
kips/ft3
kN/m3
157.1
Volume
kN/m3
kips/ft3
0.0064
lb-inch
N-mm
112.98
Moment
N-mm
lb-inch
0.0089
kip-inch
kN-mm
112.98
or
kN-mm
kip-in
0.0089
lb-ft
N-m
1.356
Energy
N-m
lb-ft
0.7375
kip-ft
kN-m
1.356
 
kN-m
kip/ft
0.7375
ft-lb
Joule
1.356
 
Joule
ft-lb
0.7375
ft-kip
kJoule
1.356
 
kJoule
ft-kip
0.7375
s/ft
s/m
3.2808
Damping
s/m
s/ft
0.3048
blows/ft
blows/m
3.2808
 
blows/m
blows/ft
0.3048