CONVERSION TABLE
Customary U.S. (English) Units to SI (Metric) Units
Quantity
Conversion
Multiplier
Accélération
in./sec2 —» m/s2
ft/sec2 —» m/s2
2.54 x 10~2
3.048 x 10"1
Area
in.2 -—♦ m2
ft2 —♦ m2
6.4516 x 10"4
9.2903 x 10"2
Area Moment of Inertia
4
4
m? —> m
4.1623 x 10~7
Density
lb( avoir. )/in.3 —► kg/m3
lb( avoir. )/ft3 (pcf)—► kg/m3
2.7680 x 10“
1.6018 x 10
Energy
ft-lb —>J
Btu —> J
1.3558
1.0551 x 103
Force
1b —* N
kip (1000 1b) —♦ N
ton (2000 1b) —♦ N
4.4482
4.4482 x 103
8.8964 x 103
Length
in. —> m
ft —> m
mi —♦ m
nautical mi —* m
2.54 x 10"2
3.048 x 10"1
1.6093 x 103
1.852 x 103
Mass
lb-sec2/ft (slug) —» kg
1b (avoir.) —» kg
1.4594 x 10
4.5359 x 10-1
Mass Moment of Inertia
lb-ft-sec2 (slug-ft2) —» kgm2
1.3558
Moment
in.-lb —+ N-m
ft-lb —> N m
1.1298 x 10-1
1.3558
Momentum, linear
Ib-sec —♦ kgm/s
4.4482
Pressure
lb/in.2 (psi) —♦ Pa
lb/ft2 (psf)
Pa
tons/ft2 (tsf) —» Pa
6.8948 x 103
4.7880 x 10
9.5760 x 104
Spring Constant, linear
lb/ft —* N/m
2.1016 x 103
Spring Constant, angular ft-lb/rad —> N m/rad
1.3558
Velocity
ft/sec —» m/s
mi/hr —» m/s
nautical mi/hr (knot) —» m/s
3.048 x 10“'
4.4704 x 10-1
5.1444 x 10-'
Volume
in.3 —» m3
ft3
m3
1.6387 x lO-5
2.8317 x 10-2
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