Unit Consersion Factors

TIME

1 min= 60 s
1 h = 60 min =3600 s
1 d = 24 h= 86,400 s

LENGTH

1 m= 3.281 ft = 39.37 in
1 km = 0.6214 mi
1 in = 0.08333 ft = 0.02540
1 ft = 12 in =1.609 km
1 mi = 5280 ft = 1.609 km
1 nautical mile = 1852 m =6080 ft

ANGLE

1 rad = 180/pi deg = 57.30 deg
1 deg= pi/180 rad =0.01745 rad
1 revolution = 2 pi rad = 360 deg
1 rev/min (rpm) = 0.01047 rad/s

AREA

1 mm2 = 1.550 x 10-3 in 2 =1.076 x10-5ft2
1 m2 = 10.76 ft 2
1 in 2 = 645.2 mm2
1 ft2 = 144 in2 = 0.0929 m2

VOLUME

1 mm3 =6.102 x10-5 in3 3.531 x 10-8ft3
1 m3= 6.102 x104in3 = 25.31 ft3
1 in3 = 1.639 x104 mm3 = 1.639 x 10-5 m3
1ft3 = 0.02832 m3

VELOCITY

1 m/s = 3.281 ft/s =39.37 in/s
1 km/h = 0.2778 m/s = 0.6214 mi/h = 0.9113 ft/s
1 mi/h = (88/60) ft/s = 1.609 km/h = 0.4470 m/s
i knot = 1 nautical mile/h = 0.5144 m/s =1.689 ft/s

ACCELERATION

1 m/s2 = 3.281 ft/s2 = 39.37 in/s2
1 in/s2 = 0.08333 ft/s2 = 0.02540 m/s2
1 ft/s2 = 0.3048 m/s2
1 g= 9.81 m/s2 = 32.2 ft/s2

MASS

1 kg =0.0685 slug
1 slug = 14.59 kb
1 t (,etric tonne) = 10 3 kg = 68.5 slug

FORCR

1 N = 0.2248 lb
1 lb =4.448 N
1 kip = 1000 lb =4448 N
1 ton = 2000 lb =8896 N

WORK AND ENERGY

1 J =1 N-m = 0.7376 ft-lb
1 ft-lb = 1.356 J

POWER

1 W =1 N-m/s = 0.7376 ft-lb/s = 1.340 x 10-3
1 ft-lb/s 1.356 W
1 hp = 550 ft-lb/s = 746 W

PRESSURE

1 Pa = 1N/m2 = 0.0209 lb/ft2 = 1.451 x 10-4 lb/in2
1 bar = 105 Pa
1 lb/in2 (psi) = 144 lb/ft2 = 6891 Pa
1lb/ft2 = 6.944 x 10-2 lb/in2 = 47.85 Pa