VOLUME:

1 gallon = 231 in.^{3} 1 gallon = 3.785 liters 1 liter = 61.02 in.^{3}

LENGTH:

1 inch = 25.4 mm 1 meter = 39.37 inches 1 micron = .000039 inches

PRESSURE:

1 bar = 14.5 PSI 1 atmosphere = 14.7 PSI 1 kg/cm^{2} = 14.2 PSI 1 in-hg = .4912 PSI 1 bar - 100 kpa 1 PSI = 6.89 kpa

POWER:

1 HP = 1.014 metric HP 1 HP = .7457 KW 1 HP = 42.4 BTU/min. 1 HP = 2545 BTU/Hr. 1 HP = 550 ft - lb/sec

SPEED:

1 ft/sec = 0.3048 M/sec

FORCE:

1 N (newton) - 0.2248 lbs.

USEFUL DATA

a) For cylinders:

A = area in (in^{2}) V = velocity in (in/min.)

b) For motors:

D = displacement in (in^{3})/rev