Units

UNITS

length mass viscosity area moment of inertia
area force dynamic viscosity mass moment of inertia
volume pressure kinematic viscosity
velocity energy angle
power (energy xfer rate) electrical conductivity light
flow thermal conductivity numbers
temperature
energy & specific energy
specific heat
VALUES MAY NOT BE EXACT DUE TO ROUNDING

Length

1 in = 2.54 cm 1 meter = 3.2808 ft 1 rod = 198 in 1 angstrom (Å) = 1E-10 m
1 mile = 5280 ft = 1.609 km 1 nautical mile = 1852 m 1 chain = 4 rod 1 fermi = 1E-15 m
1 mil = 0.001 in 1 chain = 11 fathom 1 mm = 1 m = 1E-6 m
1 furlong = 660 ft
1 lightyear = 5.8785E12 mile = 9.461E15 m

Area

1 acre = 43560.17424 ft2 1 cuerda = 3973 m2 1 barn = 1E-28 m2
1 hectare = 10,000 m2 1 are = 100 m2

Volume

1 cc = 1 ml 1 barrel = 42 gallon 1 cup = 8 fl oz
1 ft3 = 7.4805 gallon = 2.83E-2 m3 1 gallon = 4 qt 1 fl oz = 2 tablespoon (tbsp)
1 gallon  = 3.786 l = 231 in3 1 qt = 2 pint 1 tbsp = 3 tsp
1 m3 = 6.102E4 in3 1 pint = 2 cups 1 drop  = 0.05 cm3
1 l = 1,000 cm3 = 1.0576 qt

Velocity

1 knot = 0.51444 m/sec 1 rad/sec = 9.5493 rpm

Mass

1 slug = 32.17 lbm = 14.594 kg 1 blob = 12 slug 1 u = 1.66E-27 kg
1 kg = 2.205 lbm 1 kg = 2.205 lbm
1 oz = 28.35g 1 ton (SI) = 2000 kg

Force

1 lbf = 4.448 N 1 N = 1E5 dyne = 0.2248 lbf 1 ton (US) = 2000 lbf
1 N = 1 kg*m/s2

Pressure

1 psi = 6.895 kPa 1 bar = 100 kPa = 14.5 psi 1 Pa = 1 N/m2
1 torr = 1 mm Hg
1 atm = 14.6959 psi = 760 mm Hg = 1.01325 bar = 1.013E5 N/m2
1 in Hg = 3386.4 N/m2  (32°F) 1 inch water = 249.08 N/m2  (39.2°F)
1 in Hg = 3376.9 N/m2  (60°F) 1 inch water = 248.84 N/m2  (60°F)

Energy (& moments)

1 BTU = 778.17 ft*lbf 1 ft*lbf = 1.3558 J 1 HP*hr = 2.685 MJ
1 BTU = 1,054 J 1 J = 1 N*m = 1E7 ergs 1 therm = 105.5 MJ
1 calorie = 4.186 J 1 watt*hour = 3.6E3 J 1 ev = 1.6E-19 J
1 refrigeration ton = 3.517 KJ

Power (energy transfer rate)

1 HP = 550 ft*lbf/sec = 745.7 watt
1 BTU/hr = 0.293 watt 1 calorie/sec = 4.184 watt
1 J/sec = 1 watt 1 watt = 0.738 ft*lbf/sec

Flow

Temperature

TF = 1.8*Tc + 32 Tk = Tc + 273.15 TR = TF + 459.67 TR = 1.8*Tk

Energy & Specific Energy

Specific Heat

1 kJ/(kg*K) = 0.238846 Btu/(lbm*°R) 1 kcal/(kg*K) = 1 Btu/(lbm*°R) 1 Btu/(lbm*°R) = 4.1868 kJ/(kg*K)

Viscosity

Dynamic (absolute)

Kinematic
1 poise = 0.1 N*sec/m2 1 centipoise = 1 MPa*s 1 stoke = 1E-4 m2/sec
1 slug/(ft*sec) = 47.88 N*sec/m2
1 lbm/(ft*sec) = 1.488 N*sec/m2
lbf*sec/(ft2) = 47.88 N*sec/m2

Electrical Conductivity

Thermal Conductivity

Area Moment of Inertia

Mass Moment of Inertia

lbf - in - sec2 = 0.1138 N - m - sec2

Angle

Light

Numbers

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