Hi Friends,
We all are well aware about many conversion factors, but the major ones are listed below just to brush up our memory as ready reference-
Length:
1 meter = 3.281 ft.
1 meter= 1.096 yards
1 km = 0.621 mile
1 mm = 1000 micron
Area:
1 sq.km=247.104 Acres
1 sq.km=100 Hectares
1 Hectare=10000 sq.m
1 Hectare=2.47 Acres
Volume:
1 cub.m= 1000 Litres
1 cub.m=35.315 cub.ft.
1 UK Gallon=4.546 Litres
1 US Gallon=3.785 Litres
1 cub.ft.= 28.316 Litres
1 TMC = 6226 million Gallons
1 TMC = 17.1 Million Gallons per Day (MGD).
Density:
1 kg/cub.m=0.001 g/cub.cm
1 kg/cub.m=1000 g/cub.m
1 kg/cub.m=0.062 pound/cub.ft.
1 kg/cub.m=1g/litre.
Flow:
1 cub.ft/hr=7.866 cub.cm/sec
1 gallon/day=3.785 lit/day
Speed:
1 m/sec=3.281 ft/sec
1 m/ sec=3.6 km/hr
1 m/sec/2.237 miles/hr
Acceleration:
1 cm/second square = 0.394 ft/second square.
Energy:
1 calorie = 4.1868 Joules
1 kJ = 0.278 Wh
1 Btu =1055.06 Joules
1 Btu = 252 calories.
Power:
1 kw=1.341 hp
1 kw=0.947 Btu/sec
1 kw=239.057 cal/sec
1 kw=102 kg.m/sec
1 kw=860 kcal/hr.
Mass:
1 kg = 2.204 pounds
1 kg = 5000 carates
1 pound = 453.6 grams.
Viscosity:
1 stoke= 0.0001 m2/sec
1 poise = 1 g/cm.sec
1 centi poise= 0.01 poise
1 centi poise =2.42 lb/ft.hr.
Force:
1 Newton = 100,000 dynes
1 Newton = 0.102 kgf.
Pressure:
1 atm = 1.01325 bar
1 atm = 1.033 kg/sq.cm
1 atm = 101325 pascal
1 atm = 76 cm of Hg
1 atm = 100,000 N/sq.m
1 atm = 33.93 ft. water at 60 deg.C
1 psi = 2.309 ft. water at 60 deg.C.
Specific Heat:
1 Btu/lb.deg.F = 1 cal/g.deg.C
1 cal/g.deg.C = 4186.8 J/kg.deg.C
1 Btu/lb.deg.C=2326 J/kg.deg.C
1 cal/g.deg.C=1 kcal/kg.deg.C
Heat Transfer Co-efficient:
1 kcal/hr.sqm.deg.C= 1.163 w/sqm.deg.C
1 kcal/hr.sqm.deg.C=0.205 Btu/sq.ft.sec.deg.C.
Angle:
1 Radian = 57.295 degrees.
Above indicated conversion factors to be always kept in mind while carrying out Material & heat balance, process design and equipment sizing calculations.
Regards.
Rajendra Kunwar
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