Monday, September 8, 2014

Handy Conversion Formulas for Process Control

engineering calcHere are very handy conversion calculations for engineering and process control. You may want to bookmark this page for fast lookup.

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Area
  • 1 acre = 43560 square feet = 4840 square yards = 4046.86 square meters
Distance
  • 1 inch = 2.54 centimeters 1 foot = 12 inches 
  • 1 yard  = 3 feet 
  • 1 mile  = 5280 feet 
Energy
  • 1 British thermal unit = 251.996 calories = 1055.06 joules = 1055.06 watt-seconds = 0.293071 watt-hour = 1.05506 x 1010 ergs = 778.169 foot-pound-force
Force
  • 1 pound-force = 4.448222 newtons 
  • 1 kilogram-force = 9.80665 newtons 
Mass
  • 1 pound-mass = 0.4535924 kilogram
Power
  • 1 horsepower = 550 foot-pounds per second = 745.7 watts = 2544.43 British thermal units per hour  = 0.0760181 boiler horsepower 
Pressure (Absolute only)
  • 1 standard atmosphere = 14.7 pounds per square inch absolute = 101.325 kilopascal absolute = 1.01325 bar absolute = 760 millimeters of mercury absolute = 760 torr
Pressure (all gauge or all absolute)
  • 1 pounds per square inch = 2.03602 inches of mercury at 0 deg. C = 27.6799 inches of water at 4 deg. C = 6.894757 kilopascal = 0.06894757 bar 
  • 1 bar = 100 kilopascal = 14.504 pounds per square inch
  • 1 meter of water at 4 deg. C = 9.80665 kilopascal
Temperature
  • Fahrenheit = (deg. C)(9/5) + 32 
  • Celsius = (deg. F − 32)(5/9) 
  • Rankine = deg. F + 459.67
  • Kelvin = deg. C + 273.15
Velocity
  • 1 mile per hour= 88 feet per minute= 1.46667 feet per second= 1.60934 kilometer per hour = 0.44704 meter per second = 0.868976 knot
Volume
  • 1 gallon = 231.0 cubic inches = 4 quarts = 8 pints = 16 cups = 128 fluid ounces = 3.7854 liters
  • 1 milliliter = 1 cubic centimeter