This table provides a handy reference for the most commonly used conversions.

1. Metric conversion Factors for Fan Application per AMCA Standard
September 1st, 2004
Quantity "English" Unit Metric Unit Conversion Factor
Volume
cubic feet per minute
CFM
cubic meter per second
m^3/S
cubic meter per minute
m^3/min
cubic meter per hour
m^3/hr
liter per second
l/s
0.00047195
0.028317
1.6990
0.47195
Pressure
inches of water gauge
in. wg
pascal
Pa or N/m^2
millimeters
mm
248.36
25.4
Power
horsepower
hp, BHP
watt
W or J/s
Kilowatt
kw
745.70
0.7457
Torque
pound-inch
lb-in.
newton meter
N-m
0.11298
Density
pounds per cubic feet
lb/ft^3
kilogram per cubic
meter
kg/m^3
16.018
Speed
revolutions per
minute
RPM
revolution per second
rps
0.01667
Velocity, Tip Speed
feet per minute
fpm
meter per second
m/s
0.00508
Dimensions
inch
in.
millimeter
mm
25.4
Area
square foot
square inch
square meter
m^2
square millimeter
mm^2
0.0929
645.16
Length
foot
foot
yard
millimeter
mm
meter
m
meter
304.8
0.3048
0.9144

2. m
Mass (weight)
ounce
pound
gram
g
kilogram
kg
28.350
0.4536
Velocity
feet per second
feet per minute
miles per hour
meters per second
m/s
meters per second
m/s
meters per second
m/s
0.3048
0.00508
0.44704
Volume (capacity)
cubic inch
cubic yard
gallon (U.S.)
gallon (imperial)
cubic centimeter
cm^3
cubic meter
m^3
liter
l
liter
l
16.3871
0.7646
3.785
4.546
Multiply "English" Unit by conversion factor to obtain Metric Unit.
For example: 5000 CFM x 0.00047195 = 2.360 m^3/s
Divide Metric Unit by conversion factor to obtain "English" Unit.
For example: 62.1 Pa / 248.36 = 0.250 in. wg

3. General Conversion Table (TI/100-02)
July 1st, 2002
This table provides a handy reference for the most commonly used conversions.
Multiply By To Obtain
Acres 43,560 Sq.Ft.
Acres 4,047 Sq.Meters
Acres 1.562x10-3
Sq. Miles
Acres 4,840 Sq.Yards
Atmospheres 29.92 Inchesof Mercury
Atmospheres 14.7 Pounds/Sq.Inch
Barrels(British,Dry) 5.78 CubicFeet
Barrels(British,Dry) 0.1637 CubicMeters
Barrels(British,Dry) 36 Gallons(British)
Barrels,Oil 42 Gallons (U.S.)
Barrels(U.S.,Liquid) 4.211 CubicFeet
Barrels(U.S.,Liquid) 0.1192 CubicMeters
Barrels(U.S.,Liquid) 31.5 Gallons(U.S.)
Board-Feet 144 Sq.In. x 1 In. CubicInches
BritishThermal Units 0.252 Kilogram-Calories
BritishThermal Units 777.5 Foot-Pounds
Btu/Min. 12.96 Foot-Pounds/Sec.

4. Btu/Min. 0.02356 Horsepower
Btu/Min. 0.01757 Kilowatts
Btu/Min. 17.57 Watts
Bushels 1.244 CubicFeet
Bushels 2,150 CubicInches
Bushels 0.03524 CubicMeters
Bushels 4 Pecks
Bushels 64 Pints(Dry)
Bushels 32 Quarts (Dry)
Centigrams 0.01 Grams
Centiliters 0.01 Liters
Centimeters 0.0328083 Feet(U.S.)
Centimeters 0.3937 Inches
Centimeters 0.01 Meters
Centimeters 393.7 Mils.
Centimeters 10 Millimeters
Cords 8’x4’x4’ CubicFeet
CubicFeet 1,728 CubicInches
CubicFeet 0.02832 CubicMeters
CubicFeet 0.03704 CubicYards
CubicFeet 7.481 Gallons

5. CubicFeet 28.32 Liters
CubicFeet 59.84 Pints(Liq.)
CubicFeet 29.92 Quarts (Liq.)
Cu. Ft.of Water (60°F) 62.37 Pounds
CubicFeet/Minute 0.1247 Gallons/Sec.
CubicFeet/Minute 0.472 Liters/Second
CubicFeet/Minute 62.4 Lbs. of Water/Min.
CubicInches 16.39 CubicCentimeters
CubicMeters 35.31 CubicFeet
CubicYards 27 CubicFeet
CubicYards 46,656 CubicInches
CubicYards 0.7646 CubicMeters
CubicYards/Minute 0.45 CubicFeet/Second
Days 1,440 Minutes
Days 86,400 Seconds
Drams 1.772 Grams
Drams 0.0625 Ounces
Fathoms 6 Feet
Feet 30.48 Centimeters
Feet 12 Inches
Feet 0.3048 Meters

6. Feet 1/3 Yards
Feetof Water 62.43 Pounds/Sq. Ft.
Feet/Minute 0.508 Centimeters/Sec.
Feet/Minute 0.01136 Miles/Hour
Feet/Second 0.6818 Miles/Hour
Feet/Second 0.01136 Miles/Minute
Gallons(U.S.) 128 Ounces(U.S.fluid)
Gallons 3,785 CubicCentimeters
Gallons 0.1337 CubicFeet
Gallons 231 CubicInches
Gallons 3.785x10-3
CubicMeters
Gallons 4.951x10-3
CubicYards
Gallons 3.785 Liters
Gallons 8 Pints(Liq.)
Gallons 4 Quarts (Liq.)
Gallons/Minute 2.228x10-3
CubicFeet/Second
Grams 0.03527 Ounces
Grams 2.205x10-3
Pounds
Horsepower 33,000 Foot-Pounds/Min.
Horsepower 0.7457 Kilowatts
Horsepower 745.7 Watts

7. Hours 60 Minutes
Hours 3,600 Seconds
Inches 2.54 Centimeters
Inchesof Water 0.002458 Atmospheres
Inchesof Water 0.07355 Inchesof Mercury
Inchesof Water 5.204 Pounds/Sq.Ft.
Inchesof Water 0.03613 Pounds/Sq.In.
Kilograms 2.2046 Pounds
Kilometers 3,281 Feet
Kilometers 1,093.60 Yards
Kilowatts 1.341 Horsepower
Kilowatts 103
Watts
Kilowatt-Hours 3,415 BritishThermal Units
Liters 0.03531 CubicFeet
Liters 61.02 CubicInches
Liters 0.2642 Gallons
Liters 2.113 Pints(Liq.)
Liters 1.057 Quarts (Liq.)
Meters 100 Centimeters
Meters 3.2808 Feet
Meters 39.37 Inches

8. Meters 1.0936 Yards
Miles 5,280 Feet
Miles 1.6093 Kilometers
Miles 1,760 Yards
Miles/Hour 44.7 Centimeters/Sec.
Miles/Hour 88 Feet/Minute
Miles/Hour 1.467 Feet/Second
Miles/Hour 1.6093 Kilometers/Hour
Miles/Hour 26.82 Meters/Minute
Millimeters 0.1 Centimeters
Millimeters 0.03937 Inches
Millimeters 39.37 Mils
Months 30.42 Days
Months 730 Hours
Months 43,800 Minutes
Ounces 16 Drams
Ounces 437.5 Grains
Ounces 28.35 Grams
Ounces 0.0625 Pounds
Ounces(Fluid) 1.805 CubicInches
Ounces(Fluid) 0.02957 Liters

9. Pints(Dry) 33.6 CubicInches
Pints(Liq.) 28.87 CubicInches
Pints(U.S. liquid) 16 Ounces(US fluid)
Pounds 7,000 Grains
Pounds 453.6 Grams
Pounds 16 Ounces
Poundsof Water 0.01602 CubicFeet
Poundsof Water 27.68 CubicInches
Poundsof Water 0.1198 Gallons
Pounds/CubicInch 1,728 Pounds/CubicFoot
Quarts (Dry) 67.2 CubicInches
Quarts (Liq.) 57.75 CubicInches
Quarts (U.S.liquid) 0.03342 CubicFeet
Quarts (U.S.liquid) 32 Ounces(US fluid)
Quarts (U.S.liquid) 0.832674 Quarts (British)
Revolutions 360 Degrees
Revolutions 4 Quadrants
Square Centimeters 0.155 Square Inches
Square Centimeters 100 Square Millimeters
Square Feet 144 Square Inches
Square Feet 0.0929 Square Meters

10. Square Feet 1/9 Square Yards
Square Yards 9 Square Feet
Square Yards 0.8361 Square Meters
Temp.(Degs.C.)+17.8 1.8 Temp.(Degs. Fahr.)
Temp.(Degs.F.)-32 5/9 Temp.(Degs.Cent.)
Tons 907.2 Kilograms
Tons (short) 2,000 Pounds
Watts 1.341x10-3
Horsepower
Watts 10-3
Kilowatts
Weeks 168 Hours
Weeks 10,080 Minutes
Yards 91.44 Centimeters
Yards 3 Feet
Yards 36 Inches
Yards 0.9144 Meters
Years (Common) 365 Days
Years (Common) 8,760 Hours
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