PLUMBING ARITHMETIC (UNIT CONVERSIONS)

PSI to FT

1 ft = 2.31 psi

HP to lbs.ft /min

Horsepower = force x distance / time (minutes)

1 HP = 33 000 lbs*.ft / min

if into seconds

1 HP = 550 lbs*ft/s

HP to watt

1 HP = 746 Watts

1 gallon

1 gallon = 8.34 lbs

1 gallon = 231 cubic inches/in3

1 gallon = 128 fluid ounces

1 gallon = 4 quarts

1 gallon = 16 cups

1 gallon = 0.1336 cubic feet

FU to GPM

1 FU = 7.85 Gallons/min

1 FU = 28.31 Gallons/min (RNPCP, Chapter 2)

Gallon to Liters

1 Gallon = 3.78541 liters

torr

A non-SI unit of measure of pressure.

mmhg

A manometric unit of pressure, formerly defined as the extra pressure generated by a column of mercury 1 mm high.

1 torr = 1 mmhg

atm

Standard atmosphere - the unit of pressure equal to the average atmospheric pressure at sea level

1 atm = 101325 Pa or 101.3 KPa

1 atm = 760 mmhg

1 hectare

1 ha = 10 000 square meters

1 ha = 2.47105 acres

1 acre = 4046.86 square meters

liters

1 cubic meters = 1000 liters

1 cubic meters= 35.3147 cubic foot