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Last Updated:: 08/02/2017
Common Units of Fire Variables
Common Units of Fire Variables
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Character
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Commonly used C.G.S. unit
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Metric unit
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Abbreviation
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Conversion factor C.G.S. to metric system
|
|
Flame height
|
feet
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meter
|
M
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0.3048
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|
Flame angle
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degree F
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degree C
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0C
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5/9 (F-32)
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|
Fuel quantity
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pounds/sq.ft
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Kilogram/sq.metre
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Kg/m2
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4.882
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|
Temperature
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degree.Fahrenheit
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degree Celsius
degree Kelvin
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0C
0K
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0C=5/9 (0F-32)
0K=0C+273.2
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|
Wind speed
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Feet/second
miles/hour
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meter/second
kilometer/hour
|
m/s
km/hr
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0.3048
1.6093
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|
Rate of forward spread
|
feet/second
feet/hour
mile/hour
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metre/second
metre/hour
kilometer/hour
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m/s
m/hr
km/hr
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6.3048
20.12
1.6093
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|
Rate of area spread
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sq.ft/second
acre/hour
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sq.metre/second
hectare/hour
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m2/s
ha/hr
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0.0929
0.4047
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|
Heat quantity
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British Thermal
Unit Calorie
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Joule
|
J
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4.186
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Heat yield and
Heat of combustion
|
Btu/pound
Calorie/gram
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Kilojoule/kilogram
Kilojoule/kilogram
|
KJ/kg
KJ/kg
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2.326
4.186
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|
Heat capacity
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Btu/pound0F
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Kilojoule/kilogram0C
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KJ/kg0C
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4.0248
|
|
Heat flow
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Btu/second
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Watt
|
W
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1054.8
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Fire intensity
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Btu/second/ft.
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Kilowatt/metre
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KW/m
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3.461
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Source: Luna, R.K. 2007. Principles and practices of forest fire control.