TM 5-2420-230-24-2
B3.9 and B5.9 Series Engines
Weights and Measures - Conversion Factors
Section V - Specifications
Page V-77
Weights and Measures - Conversion Factors
From U.S.
From Metric
Customary
To U.S.
Quantity
U.S. Customary
Metric
To Metric
Customary
Multiply By
Multiply By
Unit Name
Abbreviation
Unit Name
Abbreviation
in2
mm2
sq. millimeters
645.16
0.001550
sq. inch
cm2
sq. centimeters
6.452
0.155
Area
ft2
m2
sq. foot
sq. meter
0.0929
10.764
Fuel
pounds per
lb/hp-hr
grams per kilowatt
g/kW-hr
608.277
0.001645
Consumption
horsepower hour
hour
miles per gallon
mpg
kilometers per liter
km/l
0.4251
2.352
Fuel
Performance
gallons per mile
gpm
liters per kilometer
l/km
2.352
0.4251
Force
pounds force
lbf
Newton
N
4.4482
0.224809
inch
in
millimeters
mm
25.40
0.039370
Length
foot
ft
millimeters
mm
304.801
0.00328
Power
horsepower
hp
kilowatt
kW
0.746
1.341
pounds force per
psi
kilopascal
kPa
6.8948
0.145037
sq. inch
inches of mercury
in Hg
kilopascal
kPa
3.3769
0.29613
inches of water
in H2O
kilopascal
kPa
0.2488
4.019299
inches of mercury
in Hg
millimeters of
mm Hg
25.40
0.039370
Pressure
mercury
inches of water
in H2O
millimeters of water
mm H2O
25.40
0.039370
bars
bars
kilopascals
kPa
100.001
0.00999
bars
bars
millimeters of
mm Hg
750.06
0.001333
mercury
(F-32) 1.8
Temperature
fahrenheit
F
centigrade
C
(1.8 x C) +32
pound force per foot
ft-lb
Newton-meter
Nm
1.35582
0.737562
pound force per inch
in-lb
Newton-meter
Nm
0.113
8.850756
Velocity
miles/hour
mph
kilometers/hour
kph
1.6093
0.6214
gallon (U.S.)
gal.
liter
l
3.7853
0.264179
Volume:
gallon (Imp*)
gal.
liter
l
4.546
0.219976
liquid
in3
cubic inch
liter
l
0.01639
61.02545
displacement
in3
cm3
cubic inch
cubic centimeter
16.387
0.06102
Weight (mass)
pounds (avoir.)
lb
kilograms
kg
0.4536
2.204623
British Thermal Unit
BTU
joules
J
1054.5
0.000948
Work
British Thermal Unit
BTU
kilowatt-hour
kW-hr
0.000293
3414
horsepower hours
hp-hr
kilowatt-hour
kW-hr
0.746
1.341
g-02 (weight)
L-1441
