Fluid Power Equivalents
Exact Equivalents
1 U.S. gallon:
=231 cubic inches
=4 quarts or 8 pints
=128 ounces (Liquid)
=133.37 ounces (weight)
=8.3356 pounds
=3.785 liters
1 Imperial gallon = 1.2 U.S. gallon
1 Liter = 0.2642 U.S. gallons
1 Cubic foot:
=7.48 gallons
=1728 cubic inches
=62.4 pounds (water)
1 Cu. ft. water weighs 62.4 lbs.
1 Bar at sea level:
=14.504 PSI
=0.98692 atmosphere
=33.6 foot water column
=41 foot oil column
Approx. 1/2 PSI decrease each 1000 feet
of elevation.
1˝ Hg =0.490 PSI
=1.131 ft. water
1 Horsepower:
=33,000 ft. lbs. per minute
=550 ft. lbs. per second
=42.4 BTU per minute
=2545 BTU per hour
=746 watts or 0.746 kw
1 PSI =2.0416˝ Hg
=27.71˝ water
=0.0689 bar
1 Atmosphere:
=1.013 bar
=29.921˝ Hg
=14.696 PSI
=760 mm Hg
1 Foot water column = 0.432.PSI
1 Foot oil column = 0.354 PSI
1 Barrel oil = 42 gallons
1 Micro-meter (mm):
=0.000001 meter (micron)
=0.001 centimeter
=0.00004 inch
25 Micro-meters = 0.001 inch
Approximate Equivalents
1 Pint = 2 cups = 32 tablespoons =
96 teaspoons = 16 fl. oz. = 1 lb.
1 Quart = 4 cups = 2 pints =
32 fluid ounces = 2 pounds.
1 Gallon = 16 cups = 4 quarts = 8 pints =
128 fl. oz. = 231 cu. ins.
1 Cup = 16 tablespoons = 48 tsp.
1 Tablespoon = 3 tsp. = 1/2 fluid oz.
1 Fluid oz. (volume) = 600 drops hyd. oil.
1 Cubic inch = 330 drops (oil).
Fluid Power Abbreviations
abs
AC
Bhn
Btu
C
cc
ccw
cfm
cfs
cir
cim
com
cpm
cps
cu. in/rev
cw
cyl
DC
dia
ext
F
fl
fpm
ft
ft-lb
gal
gpm
Hg
HP
Hz
ID
in
in-lb
int
absolute (as in psia)
alternating current
Brinell hardness number
British thermal unit
degrees Centigrade (Celsius)
closed center
counter clockwise
cubic feet per minute
cubic feet per second
cubic inches per revolution
cubic inches per minute
Common
cycles per minute
cycles per second
cubic inches per revolution
clockwise
cylinder
direct current
diameter
external
degrees Fahrenheit
fluid
feet per minute
foot
foot pound
gallon
gallons per minute
Mercury
horsepower
Hertz
inside diameter
inch
inch pound
internal
pm
ips
lb
max
min
mtd
NC
NO
NPT
NPTF
oc
oz.
P.O.
pres
PSI
psia
psig
pt
qt
r
rms
rpm
rps
scfm
Smls
sol
SSU
SUS
m
T
vac
VI
visc
473
inches per minute
inches per second
pound
maximum
minimum
mounted
normally closed
normally open
national pipe thread
dryseal pipe threads
open center
ounce
pilot operated
pressure
pounds/square inch
psi absolute
psi gauge
pint
quart
radius
root mean square
revolutions per minute
revolutions per second
standard cu. ft. per minute
seamless
solenoid
Saybolt seconds universal
Saybolt universal seconds
micro-meters or microns
torque
vacuum
viscosity index
viscosity