Page 483 - Air pollution and greenhouse gases from basic concepts to engineering applications for air emission control

Appendix 465

Table A.3 Conversion factors
Metric Imperial to metric Metric to imperial
Length
1 km = 1,000 m 1 mile = 1.609 km 1 km = 0.54 miles
1 hm = 100 m 1 foot = 0.3048 m 1 m = 3.2808 feet
1 m = 100 cm 1 in = 2.54 cm 1 cm = 0.394 in
1 m = 1,000 mm
1 m = 1,000,000 µm
1 µm = 1,000 nm
1nm = 10 Å
Area
2
2
2
1m = 100 dm 2 1ft = 0.0929 m 2 1km = 0.3861 mile 2
2
2
2
1dm = 100 cm 2 1in = 645.16 mm 2 1m = 10.7639 ft 2
2
2
1cm = 100 mm 2 1mm = 0.0016 in 2
Volume
3
1m = 1,000 l 1 gallon = 4.5461 l 1 l = 0.22 gal.
1l =1dm 3 1 US gallon = 3.785 l 1 l = 0.2642 US gal.
3
1 l = 1,000 cc 1 pint = 0.5683 l 1m = 219.969 gal.
3
1 l = 1,000 ml 1 cu. in = 16.3871 cm 3 1m = 35.3147 feet 3
Mass/Weight
1 ton = 1,000 kg 1 ton = 1.016 tons 1 ton = 0.9842 ton
1 kg = 1,000 g 1 lb. = 0.4536 kg 1 ton = 1.1023 US ton
1 g = 1,000 mg 1 oz. = 28.3495 g 1 kg = 2.2046 lb.
1 US ton = 0.9072 tonnes 1 kg = 35.274 oz.
Flow rate
3
3
3
3
3
1m /s = 1,000 l/s 1ft /min= 4.72 × 10 −4 m /s 1 m /s = 2118.88 ft /min
3
3
1m /s = 3,600 m /h
Pressure
1 kPa = 1,000 Pa 1 atm = 760 mm Hg 1 atm = 14.7 psia
1Pa = 1N/m 2 1 atm = 101.325 kPa
6
1 atm = 1.01 × 10 dyn/cm 2
1 atm = 1.01325 bar
Concentration
3
3
3
1 mg/m =1 μg/l 1 grain/ft = 2.29 g/m 3 1 g/m = 0.44 grain/ft 3
3
1g/cm = 1,000 kg/m 3
3
1g/cm = 1,000 g/l
x% = 10,000x ppmv
Viscosity
1 Pa.s = 1 N.s/m 2 1 poise = 1 g/cm.s 1 g/cm.s = 1 dyn.s/cm 2
2
1 g/cm.s = 0.1 Pa.s 1 dyn.s/cm = 0.1 Pa.s
2 2 2
1 g/cm.s = 0.1 N.s/m 1 dyn.s/cm = 0.1 N s/m
Energy
1 cal = 4.19 J 1 Btu = 0.000293 kW.h 1 kW.h = 3412.14 Btu
1 kW.h = 3,600 kJ
(continued)