Theory and Practice of Aircraft Performance

APPENDIX AConversions

Linear dimensions

1 in.	= 2.54 cm	1 cm	= 0.3937 in
1 ft	= 30.48 cm	1 cm	= 0.0328 ft
1 yd	= 0.9144 m	1 mile	= 5280 ft
1 mile	= 1.6093 km	1 m	= 1.0936 yd
1 nm	= 1.852 km	1 m	= 3.28084 ft
1 nm	= 1.1508 mile	1 km	= 0.54 nm
1 nm	= 6076 ft	1 ft	= 0.000146 nm
1 mile	= 0.869 nm	1 km	= 0.6214 mile

Area

1 in.2	= 6.5416 cm2	1 cm2	= 0.155 in.2
1 ft2	= 929.03 cm2	1 cm2	= 0.00108 ft2
1 ft2	= 0.092903 mile2	1 m2	= 10.764 ft2
1 yd2	= 0.8361 mile2	1 m2	= 1.196 yd2
1 mile2	= 2.59 km2	1 km2	= 0.3861 mile2

Volume

1 in.3	= 16.387 cm3	1 cm3	= 0.061 in.3
1 ft3	= 28316.85 cm3	1 cm3	= 0.0000353 ft3
1 yd3	= 0.764555 cm3	1 m3	= 1.308 yd3
1 ft3	= 28.317 l	1 l	= 0.0353 ft3
1 US gallon	= 3.7854 l	1 l	= 0.2642 US gallon
1 UK gallon	= 4.546 l	1 l	= 0.22 UK gallon
1 US pint	= 0.0004732 m3	1 m3	= 2113.376 US pint
1 UK pint	= 0.0005683 m3	1 m3	= 1759.754 UK pint
1 qt	= 946.353 cm3	1 cm3	= 0.001057 qt

Speed

1 ft/s	= 1.0973 km/h	1 km/h	= 0.9113 ft/s
1 ft/s	= 0.59232 kt	1 kt	= 6077.28 ft/h = 1.6881 mph
1 ft/s	= 0.000189394 mps	1 kt	= 5280 ft/h = 1.4667 ft/s
1 ft/min	= 0.00508 m/s	1 m/s	= 196.85 ft/min
1 mph	= 0.447 m/s	1 m/s	= 2.237 mph
1 mph	= 0.869 kt	1 kt	= 1.151 mph
1 kt	= 0.51444 m/s	1 m/s	= 1.944 kt
1 kt	= 1.853 km/h	1 kt	= 1.688 ft/s

Angle

1°

= 0.01716 rad

1 rad

= 57.296°

Mass

1 lb

= 0.454 kg

1 kg

= 2.2046 lb

Density

1 lb/in.3	= 27.68 g/cm3	1 g/cm3	= 0.03613 lb/in.3
1 lb/ft3	= 16.1273 kg/m3	1 kg/m3	= 0.06243 lb/ft3
1 lb	= 4.4482 N	1 N	= 0.2248 lb
1 lb	= 0.454 kg	1 kg	= 2.2046 lb
1 oz	= 28.35 g	1 g	= 0.3527 oz
1 oz	= 0.278 N	1 N	= 3.397 oz

Pressure

1 lb/in.2	= 6894.76 Pa	1 Pa	= 0.000145 lb/in.2
1 lb/ft2	= 44.88 Pa	1 Pa	= 0.02089 lb/ft ...