Metric to Imperial Conversion Table (for valves)

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Metric and Imperial conversion table (for valves)
Metric and Imperial conversion table (for valves)
Nominal diameter:
Size: Inches: 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2 2 1/4 2 1/2 3 3 1/4 3 1/2 4 5 6 8 10 12 14 16
Millimeters: DN4 6 10 15 20 25 32 40 50 65 80 90 100 125 150 200 250 300 350 400
Inches: 1 8 20 24 26 28 30 32 34 36 42 48 54 60 64 72 80 84 88 96
Millimeters: DN450 500 600 650 700 750 800 850 900 1050 1200 1350 1500 1600 1800 2000 2100 2200 2400

Symbol: Multiplicand; Multiply by: Multiplier; Product: Result
Symbol: Length
Inches: 2.54 centimeters
Feet: 30.48 centimeters
Millimeters: 0.03937 inches
Centimeters: 0.3937 inches
Meters: 3.2808 feet

Symbol: Mass (Weight)
Ounces: 28.35 grams
Pounds: 0.4536 kilograms
Grams: 0.03527 ounces
Kilograms: 2.205 pounds

Symbol: Temperature
°F to °C: (°F – 32) × 5 ÷ 9
°C to °F: °C × 9 ÷ 5 + 32

Symbol: Area
Square inches: 6.45 square centimeters
Square feet: 0.0929 square meters
Square centimeters: 0.155 square inches

Symbol: Volume (Capacity)
Fluid ounces: 29.5625 milliliters
Quarts: 0.946 liters
Gallons: 3.785 liters
Cubic feet: 0.0283 cubic meters
Milliliters: 0.0338 fluid ounces
Liters: 1.0571 quarts
Liters: 0.2642 gallons
Cubic meters: 35.34 cubic feet
Cubic inches: 5.787 × 10⁻⁴ cubic feet
Cubic feet: 1728 cubic inches

Symbol: Pressure
PSI: 0.069 bar
Bar: 6.89 kilopascals
Kilopascals: 0.07 kilogram per square centimeter
Pounds per square foot: 4.88 kilograms per square meter
Kilopascals: 0.145 PSI
Kilogram per square centimeter: 14.22 PSI
Bar: 14.5 PSI
Atmospheres: 29.92 inches of mercury (at 0°C)
Pounds per square inch: 14.7 PSI
Feet of water: 0.4335 PSI
Inches of mercury: 0.4912 PSI

Pressure classes and nominal pressures:
ASME Classes: 150, 300, 400, 600, 800, 900, 1500, 2500
Nominal pressures: 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
PN values: PN6, PN10, PN16, PN20, PN25, PN40, PN50, PN6.4, PN100, PN150, PN250, PN420

Valve nominal pressure series (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: Flow rate
Cubic feet/minute: 62.43 pounds of water/minute
Cubic feet/second: 448.83 gallons/minute
Cubic meters/hour: 4.403 US gallons/minute

Symbol: Power
Horsepower: 33,000 ft-lb/minute
Horsepower: 550 ft-lb/second
Horsepower: 745.7 watts
BTU/hour: 1.341 horsepower

Symbol: Energy
BTU: 778.3 ft-lb
Kilowatt-hours: 3413 BTU

Symbol: Torque
Newton-meters: 10.2 kgf·cm
Newton-meters: 8.8585 lbf·in