VOLUMETRIC FLOW RATES
1 gallon per minute, US (gpm) = 0.008434 liters per second (l per sec) = 0.1337 cubic feet per minute (cfm) = 8.022 cubic feet per hour (cu ft per hr)

1 cubic feet per second (cfs) = 448.86 gpm (US) = 1699.2 liters per second (l per sec)

1 liters per second (l per sec) = 2.119 cubic feet per minute (cfm) =  15.85 gpm (US)

PRESSURE
1 pascals (Pa) = 0.0001450 pounds per square inch (psi) = 0.02089 pounds per square foot (lb per ft 2 ) = 1 newtons per square meter

1 pounds per square inch (psi) =  0.0680 atmospheres, std. (atm) = 144 pounds per square foot (lb per ft 2 ) = 6894.8 pascals (Pa) = 2.301 foot of water (ft of H 2 0) 60F

1 atmospheres (atm) = 14.70 standard psi = 2116.8 lb per ft^2 = 101325 Pa

1 inch of water, 60F (in of H 2 0) = 0.03609 psi = 5.197 lb per ft^2 = 248.84 Pa

1 foot of water, 60F (ft of H 2 0) = 0.4331 psi = 62.36 lb per ft^2 = 2985 Pa