Civil Engineering Reference
In-Depth Information
Continued
Imperial unit
SI unit
SI unit symbol Conversion factor
(imperial to SI)
Conversion factor
(SI to imperial)
m
3
/s
1 ft
3
/s
0.028 32 m
3
/s
1 m
3
/s
35.315 ft
3
/s
cubic foot per
second
cubic meter per
second
=
=
1 ft
3
/s
0.035 31 ft
3
/s
liter per second
l/s
=
28.32 l/s
1 l/s
=
gallon per
minute
liter per second
l/s
1 gal/min
=
0.075 77 l/s
1 l/s
=
13.2 gal/min
Pressure, stress
ton force per
square foot
(2000 lb) (US)
1 tonf/ft
2
0.01044 ton f/ft
2
(US)
kilopascal
kPa
=
95.76 kPa
1 kPa
=
1 tonf/ft
2
0.00932 ton/ft
2
(UK)
ton force per
square foot
(2240 lb)
(UK)
=
107.3 kPa
1 kPa
=
1 lbf/ft
2
0.020 89 lbf/ft
2
pound force
per square
foot
pascal
Pa
=
47.88 Pa
1 Pa
=
1 lbft/ft
2
20.89 lbf/ft
2
=
=
kilopascal
kPa
0.047 88 kPa
1 kPa
1 lbf/in
2
0.000 1450 lbf/in
2
pound force
per square
inch
pascal
Pa
=
6895 Pa
1 Pa
=
1 lbf/in
2
0.1450 lbf/in
2
kilopascal
kPa
=
6.895 kPa
1 kPa
=
Weight
density
a
pound force
per cubic foot
kN/m
3
1 lbf/ft
3
0.157 kN/m
3
1 kN/m
3
6.37 lbf/ft
3
kilonewton per
cubic meter
=
=
Energy
Foot lbf
joules
J
1 ft lbf
=
1.355 J
1 J
=
0.7376 ft lbf
Note
a Assuming a gravitational acceleration of 9.807 m/s
2
.
