Heat

1 Btu = 252 cal

Length and Distance


1 in. = 2.54 cm
1 ft = 30.48 cm
1 meter = 100 cm
1 meter = 3.2808 ft
1 mile = 5,280 ft

Mass


1 lb_m = 453.6 gm
1 lb_m = 7,000 grains

Mole Equivalents

1 lb mole = 453.6 gm mole

Pressure (at std. conditions, 68°F)

1 atm = 407 in. W.C. =
14.7 psia = 14.7 lb_f /in.²=
760 mm Hg = 29.92 in. Hg =
101.325 kPa = 33.92 ft W.C.

Temperature

1°C = 1.8°F
°C = (°F 32)/1.8
°F = 32 + 1.8 (°C)
°K = 273 + °C
°K = °R/1.8
°R = 460 + °F
°R = 1.8(°K)

Viscosity


1 micropoise = 10^-4 cp

1 poise = 100 cp

Volume

1 mL = 1 cm³

1 liter = 0.03531 ft³

1 ft³ = 7.481 gal

1 ft³ = 28.32 liter

1 m³ = 35.31 ft³

Volume to Mass

1 mL of pure water = 1 gm

1 gallon of pure water =
8.34 lb_m

1 ft³ of pure water = 62.4 lb_m

Volume (Gas) @ STP

Volume of 1 lb mole of gas
@ STP = 385.4 ft³
(or 385 ft³ rounded)

Volume of 1 gm mole of ideal gas
@ STP = 24.04 liters
(or 24 liters rounded)