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Metric Equivalent Charts
　
Size In. 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2 4 5 6 8 10 12 14 16
DN 4 8 10 15 20 25 32 40 50 65 80 90 100 125 150 200 250 300 350 400
In. 18 20 24 26 28 30 32 34 36 42 48 54 60 64 72 80 84 88 96  
DN 450 500 600 650 700 750 800 850 900 1050 1200 1350 1500 1600 1800 2000 2100 2200 2400  
  Symbol Multiply By To Obtain Symbol
Length In. Inches 2.54 Centimeters Cm.
Ft. Feet 30.48 Centimeters Cm.
Mm. Millimeters 0.03937 Inches In.
Cm. Centimeters 0.3937 Inches In.
m. Meters 3.2808 Feet Ft.
Mass Oz. Ounces 28.35 Grams G.
Lb. Pound 0.4536 Kilograms Kg.
G. Grams 0.03527 Ounces Oz.
Kg. Kilograms 2.205 Pound Lb.
  Symbol Multiply Expression To Obtain Symbol
Temperature oF Fahrenheit (oF - 32) x 5 ÷ 9 Celsius oC
oC Celsius oC x 9 ÷ 5 + 32 Fahrenheit oF
  Symbol Multiply By To Obtain Symbol
Area In.2 Square Inches 6.45 Square Centimeters Cm.2
Ft.2 Square Feet 0.0929 Square Meters M.2
Cm.2 Square Centimeters 0.155 Square Inches In.2
Volume Fl. Oz. Fluid Ounces 29.5625 Milliliters Ml.
Qt. Quart 0.946 Liters L.
Gal. Gallons 3.785 Liters L.
Ft.3 Cubic Feet 0.0283 Cubic Meters M.3
Ml. Milliliters 0.0338 Fluid Ounces Fl. Oz.
L. Liters 1.0571 Quart Qts.
L. Liters 0.2642 Gallons Gal.
M.3 Cubic Meters 35.34 Cubic Feet Ft.3
In.3 Cubic Inches 5.787 x 10- 4 Cubic Feet Ft.3
Ft.3 Cubic Feet 1728 Cubic Inches In.3
Ft.3 Cubic Feet 7.48052 Gallons (US Lig) Gal.
Pressure PSI Pounds Per Sq. In. 0.069 Bar (no symbol)
PSI Pounds Per Sq. In. 6.89 Kilopascals Kpa
PSI Pounds Per Sq. In. 0.07 Kilogram Per Sq. Centimeter Kg/Cm.2
Lb./Ft.2 Pounds Per Sq. Ft. 4.88 Kilogram Per Sq. Meter Kg/M.2
Kpa Kilopascals 0.145 Pounds Per Sq. In. PSI
Kg/Cm.2 Kilogram Per Sq. Centimeter 14.22 Pounds Per Sq. In. PSI
(no symbol) Bar 14.5 Pounds Per Sq. In. PSI
  Atmospheres 29.92 Inches of Mercury (at 0 oC)  
  Atmospheres 14.7 Pounds Per Sq. In.  
  Feet of Water 0.4335 Pounds Per Sq. In.  
  Inches of Mercury 0.4912 Pounds Per Sq. In.  
  Pounds Per Sq. In. 2.307 Feet of Water  
  Pounds Per Sq. In. 2.036 Inches of Mercury  
 
Class
ASME
ASME Class		 150 300 400 600 800 900 1500 2500 4500
MPa 0.6 MPa
1.0 MPa
1.6 MPa
2.0 MPa		 2.5 MPa
4.0 MPa
5.0 MPa		 6.4 MPa 10.0 MPa - 15.0 MPa 25.0 MPa 42.0 MPa 76.0MPa
PN PN6
PN10
PN16
PN20		 PN25
PN40
PN50		 PN6.4 PN100 - PN150 PN250 PN420 PN760
 
 MPa (bar)
0.05(0.5) 0.1(1.0) 0.25(2.5) 0.4(4.0) 0.6(6.0) 0.8(8.0)
1.0(10.0) 1.6(16.0) 2.0(20.0) 2.5(25.0) 4.0(40.0) 5.0(50.0)
6.3(63.3) 10.0(100.0) 15.0(150.0) 16.0(160.0) 20.0(200.0) 25.0(250.0)
28.0(280.0) 32.0(320.0) 42.0(420.0) 50.0(500.0) 63.0(630.0) 80.0(800.0)
100.0(1000.0) 125.0(1250.0) 160.0(1600.0) 200.0(2000.0) 250.0(2500.0) 335.0(3350.0)
  Symbol Multiply By To Obtain Symbol
Flow   Cubic Feet/Min. 62.43 Pounds of Water/Min.  
  Cubic Feet/Sec. 448.831 Gallons/Min.  
  m3/hr 4.403 US GPM  
Power   Horsepower 33,000 Ft.-Lb./Min.  
  Horsepower 550 Ft.-Lb./Sec.  
  Horsepower 745.7 Watts  
  Ft.-Lb./Sec. 4.6263 BTU/Hr  
  Kilowatts 1.341 Horsepower  
Energy   BTU 778.3 Ft. Lbs.  
  Kilowatts-Hrs 3413 BTU  
Torque   NM 10.2  kgf·cm  
  NM 8.8585  lbf·in  
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