MHS Chemistry
Conversion Equivalents

MASS
1 kg = 1000 g = 2.20462 lbm = 35.27392 oz
1 lbm = 16 oz = 5x10–4 ton = 453.593 g

LENGTH/AREA
1 m = 100 cm = 1000 mm = 106mm = 109 nm = 1010 Å = 39.37 in = 3.2808 ft = 1.0936 yd
1 foot = 12 inches = 30.5 cm                        1 inch = 2.54 cm
1 mile = 5280 ft                                               1 sq mile = 640 acre

VOLUME
1 m3 = 103 L = 35.3145 ft3 = 113.51 Pecks = 106 cm3 = 264.17 US gal = 6.28 Barrels (US)
1 U.S. gal = 4 quarts = 8 pints = 16 cups
1 ft3 = 1728 in3 = 7.4085 US gallons = 28.317 L
1 L = 1000 cc = 1000 mL = 1000 cm3 = 0.001 m3 = 1 dm3= 61.023 in3

FORCE
1 N = 1 kg·m/s2 = 0.22481 lbf = 105 dynes = 105 g·cm/s2
1 lbf = 32.174 lbmft/s2 = 4.4482 N
1 stone = 14.00 lbf

PRESSURE
1 N/m2 = 1 Pascal = 10 dynes/cm2 = 10–5 bars
1 atm = 101.325 kPa = 760 mmHg @0 °C = 760 torr = 10.333 mH2O @4 °C = 14.696 lbf /in2 =
    14.696 psi = 33.9 ftH2O @4 °C = 29.921 inHg @0 °C

ENERGY
1 J = 1 N·m = 107 ergs = 0.23901 cal = 2.778x10–7 kW·hr = 0.7376 ft·lbf = 9.486x10–4 BTU
1 cal = 4.184 J

POWER
1 W = 1 J/s = 0.23901 cal/s = 0.7376 ft·lbf/s = 9.486x10–4 BTU/s = 1.341x10–3 hp

TIME
1 century = 100 years = 36525 days            1 day = approx 24.0 hours
1 hour = 60 minutes = 3600 seconds

example:  the factor to convert ounces to grams is  453.593 g
16 oz
Note: as far as Significant Digits are concerned, equivalents within a system (1 m = 1000 mm, or 12 in = 1 ft) can be considered perfect.  That is, you can assume that they are always more exact than any of your measurements.  For conversions between systems (e.g. 2.54 cm = 1 in.),  use the significant digits in the number that is not a multiple of 1 or 10.  For 2.54 cm = 1 inch, the conversion factor has 3 significant digits because of the centimeters.

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