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LENGTH
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1centimeters(cm) = 10 millimeters (mm)
1 meter= 100 centimeters (cm)
10 decimeters (dm) = 1 meter
1 dekameter (dam) = 10 meters
1 hectometer (hm) = 100 meters
1 kilometer (km) = 1000 meters
1 foot (ft) = 12 inches (in)
1 yard (yd) = 3 feet (ft)
1 yard (yd) = 36 inches (in)
1 mile (mi) = 5,280 feet (ft)
1 inch = 2.54 centimeters
1 meter 3.28 feet
1 mile 1.61 km
1 foot 0.30 meters (m)
1 yard 0.91 meters
1 km 0.62 mi
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AREA
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1 square meter (m2) = 10.76 ft2
1 square mile (mi2) = 640 acres
1 square foot (ft2) = 929 cm2
1 acre = 43,560 ft2
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VOLUME
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1 liter (l) = 1000cm3 = 1.057 quart (qt) = 61.02 in3 = 0.03532 ft3
1 cubic meter (m3) = 1000 l = 35.32 ft3
1 cubic foot (ft3) = 7.481 U.S gallon = 0.02832 m3 = 28.32 l
1 U.S. gallon (gal) = 231 in3 = 3.785 l
1 British gallon = 1.201 U.S gallon = 277.4 in3 |
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MASS
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1 kilogram (kg) = 2.2046 pounds (lb) = 0.06852 slug;
1 lb = 453.6 gm = 0.03108 slug
1 slug = 32.174 lb = 14.59 kg |
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SPEED
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1 km/h = 0.2778 m/sec = 0.6214 mi/h = 0.9113 ft/sec
1mi/h = 1.467 ft/sec = 1.609 km/h = 0.4470 m/sec |
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DENSITY
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1 gm/cm3 = 103 kg/m3 = 62.43 lb/ft3 = 1.940 slug/ft3
1 lb/ft3 = 0.01602 gm/cm3
1 slug/ft3 = 0.5154 gm/cm3 |
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FORCE
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1 newton (nt) = 105 dynes = 0.1020 kgwt = 0.2248 lbwt
1 pound weight (lbwt) = 4.448 nt = 0.4536 kgwt = 32.17 poundals
1 kilogram weight (kgwt) = 2.205 lbwt = 9.807 nt
1 U.S.short ton = 2000 lbwt
1 long ton = 2240 lbwt
1 metric ton = 2205 lbwt |
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ENERGY
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1 joule = 1 nt m = 107 ergs = 0.7376 ft lbwt = 0.2389 cal = 9.481 × 10-4 Btu
1 ft lbwt = 1.356 joules = 0.3239 cal = 1.285 × 10-3 Btu
1 calorie (cal) = 4.186 joules = 3.087 ft lbwt = 3.968 × 10-3 Btu
1 Btu (British thermal unit) = 778 ft lbwt = 1055 joules = 0.293 watt h
1 kilowatt hour (kw hr) = 3.60 × 106 joules = 860 kcal = 3413 Btu
1 electron volt (ev) = 1.602 × 10-19 joule |
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POWER
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1 watt = 1 joule/sec = 107 ergs/sec = 0.2389 cal/sec
1 horsepower (hp) = 550 ft lbwt/sec = 33,000 ft lbwt /min = 745.7 watts
1 kilowatt (kw) = 1.341 hp = 737.6 ft lbwt/sec = 0.9483 Btu/sec |
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PRESSURE
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1 nt/m2 = 10 dynes/cm2 = 9.869 × 10-6 atmosphere = 2.089 × 10-2 lbwt/ft2
1 lbwt/in2 = 6895 nt/m2 = 5.171 cm mercury = 27.68 in water
1 atmosphere (atm) = 1.013 × 105 nt/m2 = 1.013 × 106 dynes/cm2 = 14.70 lbwt/in2
= 76 cm mercury = 406.8 in.water |