10
APPROXIMATE CONVERSIONS
SI Conv Non–SI Conv SI
Unit Factor Unit Factor Unit
Torque
newton meter (N·m)
×
8.9
= ln·in
×
0.113
= N·m
newton meter (N·m)
×
0.74 = lb·ft.
×
1.36
= N·m
newton meter (N·m)
×
0.102
= kg·m
×
7.22
= lb·ft.*
Pressure (Pa = N/m
2
)
kilopascal (kPa)
×
4.0
= in. H
2
O
×
0.249
= kPa
kilopascal (kPa)
×
0.30
= in. Hg
×
3.38
= kPa
kilopascal (kPa)
×
0.145
= psi
×
6.89
= kPa
(bar)
×
14.5
= psi
×
0.069
= bar*
(kg/cm
2
)
×
14.22
= psi
×
0.070
=
k f/
2
*
newton/mm
2
×
145.04
= psi
×
0.069
= bar*
megapascal (MPa)
×
145
= psi
×
0.00689
= MPa
(Pa=N·m
2
)
Power r (W = J/s)
kilowatt (kW)
×
1.36
= PS (cv)
×
0.736
= kW
kilowatt (kW)
×
1.34
= HP
×
0.746
= kW
kilowatt (kW)
×
0.948
= Btu/s
×
1.055
= kW
watt (W)
×
0.74
= ft·lb/s
×
1.36
= W
(W=J/s)
Energy (J = N·m)
kilojoule (kJ)
×
0.948
= Btu
×
1.055
= kJ
joule (J)
×
0.239
= calorie
×
4.19
= J
(J=N·m)
Velocity and Acceleration
meter per sec
2
(m/s
2
)
×
3.28 = ft/s
2
×
0.305 = m/s
2
meter per sec (m/s)
×
3.28 = ft/s
×
0.305 = m/s
kilometer per hour (km/h)
×
0.62
= mph
×
1.61
= km/h
Horse Power/Torque
BHP
×
5252 R.P.M. = TQ (lb·ft) TQ Z R.P.M. 5252 = B.H.P.
Temperature
°C = (°F–32) ÷ 1.8 °F= (°C Z 1.8) + 32
Flow Rate
liter/min (dm
3
/min)
×
0.264
= US gal/minZ3.785
= l/min
Note : ( ) Non–SI Unit
