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Conversion Factors

Conversion Factors

Atmospheres

  • atmospheres x 29.92 = inches of mercury at 0°C
  • atmospheres x 1013.25 = millibars
  • atmospheres x 760 = millimeters of mercury at 0°C
  • atmospheres x 14.7 = pounds/square inch

BTU/foot²

  • BTU/foot² min x 1.134 = joules/centimeter² min
  • BTU/foot² min x 0.271 = langleys/min
  • BTU/foot² min x 189 = watts/meter²

Cubic feet/sec

  • cubic feet/sec x 0.02832 = cubic meters/sec
  • cubic feet/sec x 0.6463 = million gallons/day

Feet/sec

  • feet/sec x 1.097 = kilometers/hour
  • feet/sec x 0.592 = knots
  • feet/sec x 0.305 = meters/sec
  • feet/sec x 0.682 = miles/hour

Footcandles

  • footcandles (lumens/square foot) x 10.764 = lux (lumens/square meter)

Inches of mercury

  • inches of mercury x 33.864 = millibars
  • inches of mercury x 25.4 = millimeters of mercury
  • inches of mercury x 3.3864 = kilopascals
  • inches of mercury x 0.4912 = pounds/square inch
  • inches of mercury x 0.03342 = standard atmospheres

Joules/centimeter² min

  • joules/centimeter² min x 0.8821 = BTU/foot² min
  • joules/centimeter² min x 0.2389 = langleys/min
  • joules/centimeter² min x 166.66 = watts/meter²

Kilometers/hour

  • kilometers/hour x 0.911 = feet/sec
  • kilometers/hour x 0.540 = knots
  • kilometers/hour x 0.278 = meters/sec
  • kilometers/hour x 0.621 = miles/hour

Kilopascals

  • kilopascals x 0.2953 = inches of mercury at 0°C
  • kilopascals x 10 = millibars
  • kilopascals x 7.50075 = millimeters of mercury at 0°C
  • kilopascals x 0.1450 = pounds/square inch

Knots

  • knots x 1.689 = feet/sec
  • knots x 1.853 = kilometers/hour
  • knots x 0.515 = meters/sec
  • knots x 1.152 = miles/hour

Langleys/min

  • langleys/min x 697.32 = watts/meter²
  • langleys/min x 4.1855 = joules/centimeter² min
  • langleys/min x 3.692 = BTU/foot² min

Lumens/square foot

  • lumens/square foot (footcandles) x 10.764 = lumens/square meter (lux)
  • lumens/square meter (lux) x 0.0929 = lumens/square foot (foot candles)

Meters/sec

  • meters/sec x 3.281 = feet/sec
  • meters/sec x 3.600 = kilometers/hour
  • meters/sec x 1.943 = knots
  • meters/sec x 2.237 = miles/hour

Miles/hour

  • miles/hour x 1.467 = feet/sec
  • miles/hour x 1.609 = kilometers/hour
  • miles/hour x 0.868 = knots
  • miles/hour x 0.447 = meters/sec

Millibars

  • millibars x 0.02953 = inches of mercury
  • millibars x 0.0010197 = kilograms/centimeter²
  • millibars x 0.100 = kilopascals
  • millibars x 0.7500616 = millimeters of mercury
  • millibars x 0.014504 = pounds/square inch
  • millibars x 0.0009869 = standard atmospheres

Millimeters of mercury

  • millimeters of mercury x 0.03937 = inches of mercury
  • millimeters of mercury x 0.13332 = kilopascals
  • millimeters of mercury x 1.33322 = millibars
  • millimeters of mercury x 0.01934 = pounds/square inch
  • millimeters of mercury x 0.001316 = standard atmospheres

Million gallons/day

  • million gallons/day x 1.54723 = cubic feet/second

Watts/meter²

  • watts/meter² x 0.00529 = BTU/foot² min
  • watts/meter² x 0.006 = joules/centimeter² min
  • watts/meter² x 0.00143 = langleys/min