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Conversion factors

Numerical

π = 3.142

π2 = 9.87

Area

 

Force

1 N = 105 dyn = 0.2248 lb f

1 lb f = 4.4482 N

1 Kg f = 9.81 N

Density   

1 g cm-3 = 1000 kgm3

1 g cm-3= 1kg L-1

Volume

 

Pressure

 

Energy

 

Angle and angular speed

π rad = 180o

1 rad = 57.30o

Magnetic flux

1 Wb = 108 maxwell

1 maxwell = 10-8 Wb

Resistance
1 M Ω = 106 Ω
1 Ω = 106 µ Ω

 

Length

1 m = 102 cm = 1.0936 yards

1m = 3.281 feet = 39.37 inches

1 Km = 103 m = 0.6215 miles

1 mile = 5280 feet = 1.609 km

1 inch = 2.54 cm

1 yd = 3 feet = 91.44 cm

1 light year = 9.461 X 1015 m

1 AU (astronomical unit) = 1.496 X 1011 m

1 µ (micron) = 10-6 m

1 A (angstrom) = 0.1 nm = 10-8 cm = 10-10 m

Time

1 hour = 60 min = 3600 seconds

1 day = 24 hours = 1440 minutes = 86400 seconds

1 year = 365.24 days = 3.156 X 107 seconds

Mass

1 kg = 1000 g  = 2.205 lb = 6.022 X 1023 amu

1 lb = 453.6 g = 0.4536 kg

1 amu = 1.6606 X 10-27 kg = 931,5 Mev / c2

1 tonne = 1000 kg = 106 kg

1 slugg = 14.59 kg

Speed

1 kmh-1 = 0.2778 ms-1 = 0.6215 miles.hour-1 

1 miles.hour-1 = 0.4470 ms-1 = 1.609 kmh-1

Current

1 µ A = 10-6 A

1 mA = 10-3 A

Electric field

1 NC-1 = 1 Vm-1 = 10-2 Vcm-1 

Magnetic field strength

1 T = 104 G

1 G = 10-4 T

Capacitance

1 F = 9 X 1011 stF

1 µF = 10-6 F

1 pF = 10-12 F

 

 

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