Source: https://ebookschoice.com/unit-conversion-factors/
Length
1 m = 100 cm = 1000 mm = 109 nm
1 km = 1000 m = 0.6214 mi
1 m = 3.281 ft = 39.37 in.
1 cm = 0.3937 in.
1 in. = 2.540 cm
1 ft = 30.48 cm
1 yd = 91.44 cm
1 mi = 5280 ft = 1.609 km
1 Å = 10-10 m = 10-8 cm = 10-1 nm
1 nautical mile = 6080 ft
1 light@year = 9.461 * 1015 m
Area
1 cm2 = 0.155 in.2
1 m2 = 104 cm2 = 10.76 ft2
1 in.2 = 6.452 cm2
1 ft2 = 144 in.2 = 0.0929 m2
Volume
1 liter = 1000 cm3 = 10-3 m3 = 0.03531 ft3 = 61.02 in.3
1 ft3 = 0.02832 m3 = 28.32 liters = 7.477 gallons
1 gallon = 3.788 liters
Time
1 min = 60 s
1 h = 3600 s
1 d = 86,400 s
1 y = 365.24 d = 3.156 * 107 s
Angle
1 rad = 57.30 = 180 >p
1 ° = 0.01745 rad = p>180 rad
1 revolution = 360 = 2p rad
1 rev>min 1rpm2 = 0.1047 rad>s
Speed
1 m>s = 3.281 ft>s
1 ft>s = 0.3048 m>s
1 mi>min = 60 mi>h = 88 ft>s
1 km>h = 0.2778 m>s = 0.6214 mi>h
1 mi>h = 1.466 ft>s = 0.4470 m>s = 1.609 km>h
1 furlong>fortnight = 1.662 * 10-4 m>s
Acceleration
1 m>s2 = 100 cm>s2 = 3.281 ft>s2
1 cm>s2 = 0.01 m>s2 = 0.03281 ft>s2
1 ft>s2 = 0.3048 m>s2 = 30.48 cm>s2
1 mi>h # s = 1.467 ft>s2
Mass
1 kg = 103 g = 0.0685 slug
1 g = 6.85 * 10-5 slug
1 slug = 14.59 kg
1 u = 1.661 * 10-27 kg
1 kg has a weight of 2.205 lb when g = 9.80 m>s2
Force
1 N = 105 dyn = 0.2248 lb
1 lb = 4.448 N = 4.448 * 105 dyn
Pressure
1 Pa = 1 N>m2 = 1.450 * 10-
4 lb>in.2 = 0.0209 lb>ft2
1 bar = 105 Pa
1 lb>in.2 = 6895 Pa
1 lb>ft2 = 47.88 Pa
1 atm = 1.013 * 105 Pa = 1.013 bar
= 14.7 lb>in.2 = 2117 lb>ft2
1 mm Hg = 1 torr = 133.3 Pa
Energy
1 J = 107 ergs = 0.239 cal
1 cal = 4.186 J 1based on 15 calorie2
1 ft # lb = 1.356 J
1 Btu = 1055 J = 252 cal = 778 ft # lb
1 eV = 1.602 * 10-19 J
1 kWh = 3.600 * 106 J
Mass–Energy Equivalence
1 kg48.988 * 1016 J
1 u4931.5 MeV
1 eV41.074 * 10-9 u
Power
1 W = 1 J>s
1 hp = 746 W = 550 ft # lb>s
1 Btu>h = 0.293 W
