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| Last Updated:: 08/02/2017

Common Units of Fire Variables

 

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

Source: Luna, R.K. 2007. Principles and practices of forest fire control.