_ex libris_ my Dad


1 ft = 30.48 cm

1 inch = 2.54 cm = 25.4 mm 

1 cu m = 35.31 cu ft

1 cu ft = 7.48 gal (US)

1 bbl = 42 gal (US)

1 kg = 2.205 lbs

1 lb = 453.6 g

1 lb = 16 oz = 14.583 oz (troy) = 7000 grains

1 short ton ( or net ton) = 2000 lbs

1 long ton = 2240 lbs

1 metric ton (tonne) =1000 kg = 2205 lb

1 g/cm^3 = 62.43 lb/ft^3 = 8.345 lb/gal

1 atm = 760 mm mercury = 29.92 inch mercury

1 atm = 14.7 psi

1 inch water = 5.2 lb/ft^2

degrees C = (degrees F - 32)/1.8 or = 5*(degrees F - 32)/9

degrees F = 1.8(degrees C) + 32

degrees K = degrees C + 273 (approx)

degrees R = degrees F + 460

At Standard conditions (STP)

    0 degrees C     and     1 atm

        Ideal gas volumes 1 g mol = 22.4 l

            1 Kg mol = 22.4 cu m (m^3)

            1 lb mol = 359 cu ft (ft^3)

 

1 g cal = 4.183 joules = 4.183 watt - sec

1 kg cal = 1000 g cal = 2.205 lb cal = 3.97 Btu

1 kw hr = 3415 Btu

1 Btu = 778 ft-lb

 

1 hp = 550 ft-lb/sec = 33 000 ft-lb/sec

1 hp = 745.5 watts = 2546 Btu/hr

1 kw = 1.341 hp = 3415 Btu/hr

 

1 poise = 100 centipoise = 1 g mass/cm-sec

1 poise = 0.0672 lb mass/ft-sec

1 poise = 242 lb mass/ft-hr