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.

For specifics on any instrument, call 1-800-824-5873,
email us at marketing@allweatherinc.com
or fill out a request for more information form