Page 610 - Handbook of Electrical Engineering

CONVERSION FACTORS FOR THE SI SYSTEM OF UNITS 603

Convert to Multiply by

inches of mercury mb 33.8639
inches of mercury N/m 2 3386.39
kgf/cm 2 kN/m 2 98.0665
kgf/m 2 N/m 2 9.80665
lbf/in 2 mb 68.9476
lbf/in 2 kgf/cm 2 0.0703
lbf/in 2 N/m 2 6894.76
mm of mercury mb 1.33322
N/m 2 lbf/in 2 0.000145
N/m 2 ft of water 0.0003345
N/m 2 mm of mercury 0.0075
N/m 2 m of water 0.000102
N/m 2 in of mercury 0.0002953
Pa, pascal N/m 2 1.0
pdl/ft 2 N/m 2 1.48816
pressure in inches of water lbf/in 2 0.036127
torr (mm of Hg) N/m 2 133.322
UK ton/ft 2 kN/m 2 107.252

I.4.11 Moment of Inertia and Momentum

Convert to Multiply by
lb-in 2 kg-m 2 2.92640 × 10 −4
lb-ft 2 kg-m 2 0.042140
lb-ft/s (linear) kg-m/s 0.138255
lb-ft/s (rotational) kg-m/s 0.042140
oz-in 2 kg-m 2 1.82900 × 10 −6

I.4.12 Illumination

Convert to Multiply by

angular degrees rad 3.1415926536/180.0
cd/ft 2 cd/m 2 10.7639
cd/in 2 cd/m 2 1550.0
footcandle, lm/ft 2 lx 10.7639
phot, lm/ft 2 lx 10000.0
radians degrees 180.0/3.1415926536
=57.2957795131