Industry instrumentation : Units and conversion tables for process control

 
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ENGLISH UNITS AND INTERNATIONAL SYSTEM OF UNITS(SI units) - CONVERSION TABLES

 

  • Units to be converted  : 
  • Acres U.S. (area) 
  •  Atmospheres , 
  • Standard at Sea Level Pressure , 
  • Barrels , Petroleum - bbl (volume ) , 
  • Bars (pressure)
  • British Thermal Units-International Table -Btu (energy)
  • BTU per hour - International Table - Btu/h (power)
  • BTU per minute , International Table - Btu/min. (power)
  • Calories , International Table - cal (energy)
  • Centares - ca ( area )
  • Centimeters - cm (length)
  • Centimeters of mercury , at 0°C - cmHg (pressure)
  • Centimeters per second - cm/s (velocity )
  • Centipoises - cP (absolute viscosity )
  • Centistokes (cSt ( kinematic viscosity )
  • Cubic centimeters - cm³ (volume )
  • Cubic centimeters per second - cm³/s ( volume per unit time )
  • Cubic feet - ft³ ( volume )
  • Cubic feet per hour - cfh ( volume per unit time ) 
  • Cubic feet per minute - cfm ( volume per unit time ) 
  • Cubic feet per second - cfs (volume per unit time )
  • Cubic inches - in³ (volume)
  • Cubic inches per minute - in³/min ( volume per unit time ) 
  • Cubic meters - m³ ( volume )
  • Cubic meters per hour - m³/h ( volume per unit time ) 
  • Cubic meters per minute - m³/min ( volume per unit time ) 
  • Cubic meters per second - m³/s ( volume per unit time ) 
  • Degrees , Angular -  ° (plain angles )
  • Degrees Celsius - °C (temperature )
  • Degrees Centigrade 
  • Degrees  Fahrenheit - °F
  • Degrees Kelvin
  • Degrees Rankine - °R (temperature )
  • Degrees per second , Angular - °/s (angular velocity )
  • Dynes (force)
  • Feet - ft (length  )
  • Feet of water , at 60°F - ft H2O (pressure )
  • Feet per minute - ft/min (velocity)
  • Feet per second  - ft/s (velocity)
  • Feet per second squared - ft/s² (acceleration )
  • Foot-pounds-force - ft-lbf (energy)
  • Foot pounds-force per hour - ft-lbf/h (power)
  • Foot -pounds per minute - ft-lbf/min (power )
  • Foot -pounds per second - ft-lbf/s (power )
  • Gallons , Imperial - gal (volume )
  • Gallons , U.S. - gal (volume )
  • Gallons per hour , U.S.gph (volume per unit time ) 
  • Gallons per minute, U.S. - U.S.gpm (volume per unit time ) 
  • Gallons per second , U.S. - U.S.gps (volume per unit time ) 
  • Grains , Avoirdupois or Troy - gr (mass)
  • Grams - g(mass)
  • Grams per cubic centimeter - g/m³ (mass per unit volume )
  • Grams per liter (g/L)
  • Hectares - ha (area)
  • Horsepower , Boiler - boiler hp (power)
  • Horsepower , Mechanical - hp  (power)
  • Horsepower  , Metric - metric hp (power)
  • Horsepower-powers - hp-p (energy)
  • Inches - in (length )
  • Inches of Mercury , at 0°C - inHg (pressure)
  • Inches of water , at 60°F - inH2O (pressure)
  • Joules - J (energy)
  • Kelvin - K (temperature)
  • Kilocalories , International Table - kcal (energy)
  • Kilocalories per minute , International Table - kcal/min (power)
  • Kilograms  - kg (mass)
  • Kilograms per cubic meter - kg/m³ ( mass per unit volume)
  • Kilograms per hour - kg/h (mass per unit time) 
  • Kilograms per second - kg/s (mass per unit time) 
  • Kilograms-force - kgf (force)
  • Kilograms-force per square centimeter - kgf/cm² (pressure)
  • Kilograms-force times meters - kgf x m (torque)
  • Kilometers per hour - km/h (velocity )
  • Kilopascals - kPa (pressure)
  • Kloponds 
  • Kilowatt-hours - Kw-h (energy)
  • Knot , International - kn (velocity )
  • Liters - L (volume ) 
  • Liters per second - L/s ( volume per unit time)
  • Megapascals - MPa ( pressure ) 
  • Megawatts - MW (power)
  • Meters - m (length )
  • Meters per minute - m/min (velocity )
  • Meters per second - m/s (velocity )
  • Meters per second squared - m/s² (acceleration)
  • Metric tons 
  • Micrometers - µm (length)
  • Microns
  • Miles , Statute - mi (length)
  • Miles , International Nautical - mi (length)
  • Miles per hour , Statute - mph (velocity)
  • Millibars - mbar (pressure )
  • Milliliters 
  • Millimeters - mm (length)
  • Millileters od mercury , at 0°C - mmHg (pressure)
  • Million gallons per day , U.S. - million U.S.gpd (volume per unit time )
  • Minutes , Angular - ' (plane angles)
  • Newtons - N (force)
  • Newtons-meters - N.m (torque)
  • Ounces , Avoirdupois - av.oz (mass)
  • Ounces , Fluid imperial - oz (volume)
  • Ounces , Fluid , U.S. - oz (volume)
  • Ounces , Troy - troy oz (mass)
  • Parts per million , by weight (mass) in water at 60°F - ppm 
  • Pascals - Pa (pressure)
  • Pennyweights - dwt (mass)
  • Pints , Fluid - pt (volume)
  • Poises - P (absolute viscoity )
  • Pounds , Avoirdupois - lb (mass)
  • Pounds , Troy - lb (mass)
  • Pounds per cubic foot - lb/ft³ (mass per unit volume )
  • Pounds per cubic inch - lb/in³ (mass per unit volume )
  • Pounds per hour - lb/h (mass per unit time )
  • Pounds per imperial gallon - lb/gal (mass per unit volume )
  • Pounds per minute - lb/min (mass per unit time )
  • Pounds per U.S. gallon - lb/gal (mass per unit volume )
  • Pounds-force - lbf (force)
  • Pounds-force per suare inch - psi (pressure)
  • Quarts , fluid - qt (volume )
  • Radians - rad (plane angles )
  • Radians per second - rad/s (angular velocity )
  • Revolutions per minute - r/min (angular velocity )
  • Revolutions per second - r/s (angular velocity )
  • Seconds , Angular - " (plane angles )
  • Square centimeters - cm² (area )
  • Square feet - ft² (area)
  • Square inches - in² (area)
  • Square meters - m² (area)
  • Square miles - mi² (area)
  • Stokes - St (kinematic viscosity )
  • Tonnes - t (mass)
  • Tons - long ton (mass )
  • Tons - ton or short ton (mass)
  • Torr
  • Watts - W (power)
  • Watt-hours - W.h (energy)
  • Yards - yd (length )

 

 

NOTE : Where a qualifying temperature is noted, the values for this unit vary with temperature 

NOTE : Where a qualifying temperature is noted, the values for this unit vary with temperature 

NOTE: There are definitions of Btu other than the International Table, but they differ only past the third decimal place. If four or more decimal places are needed, refer to the appropriate handbook.

NOTE: See note under Btu.

BTU PER MINUTE, International Table - Btu/min (power) .NOTE: Multiply by 60 and refer to Btu Per Hour.

CALORIES, International Table - cal (energy) .NOTE: Divide by 1000 and refer to Kilocalories.

CENTARES - ca (area) .NOTE: Refer to Square Meters*.

CENTIMETERS - cm (length) . NOTE: Divide by 100 and refer to Meters

CENTIMETERS OF MERCURY, at O°C - cmHg (pressure) .NOTE: Multiply by 10 and refer to Millimeters; of Mercury.

CENTIMETERS PER SECOND - cm/s (velocity) .NOTE: Divide by 100 and refer to Meters Per Second.

*Indicates proper SI unit

CENTIPOISES - cP (absolute viscosity) NOTE: Divide by 100 and refer to Poises.

CENTISTOKES - cSt (kinematic viscosity) NOTE: Divide by 100 and refer to Stokes

 

CUBIC FEET PER HOUR-cth (volume per unit time) NOTE: Divide by 60and refer to Cubic Feet Per Minute.

CUBIC FEET PER SECOND-cfs (volume per unit time) NOTE: Multiply by 60 and refer to Cubic Feet Per Minute.

CUBIC METERS PER HOUR-m³/h (volume per unit time) NOTE: Divide by 3600 and refer to Cubic Meters Per Second.*

CUBIC METERS PER MINUTE - m3/min (volume per unit time) .NOTE: Divide by 60 and refer to Cubic Meters Per Seconds

NOTE: See also the Temperature Conversion Tables.

NOTE: Where a qualifying temperature is noted, the values for this unit vary with temperature.

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