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weights

     sizes
 

Properties

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Useful Conversion Factors
  Quantity From English Units To Metric Units Multiply by*
Moment of mass lb . ft kg . m 0.1383
Moment of inertia lb . ft2 kg . m 2 0.042 14
Second moment of area in4 mm4 416 200
  Section modulus in3 mm3 16 390
Bending moment, ft-lb N . m 1.356
Torque, moment of force ft-kip kN . m 1.356

Multiplication Factor

 Prefix Symbol

1,000,000,000 = 109 		 
 giga
 G
1,000,000 = 106  mega  M
1,000 = 103  Kilo  k
100 = 102  hecto  h
Multiplication Factor Prefix Symbol

0.01 = 10-2		  
 centi		  
 c
0.001=10-3  milli  m
0.000001 = 10-6  micro  μ
0.00000001 = 10-9  nano  n

Area

Convert from:

To:


      

To convert from to multiply by
     
square foot (sq ft) square meter (sq m) 0.09290304 E
square inch (sq in) square meter (sq m) 0.00064516 E
square yard (sq yd) square meter (sq m) 0.83612736 E
acre (ac) hectare (ha) 0.4047

Length

Convert from:

To:


      

To convert from to multiply by
      
mile (US Statute) kilometer (km) 1.609347
inch (in) millimeter (mm) 25.4 *
inch (in) centimeter (cm) 2.54 *
inch (in) meter (m) 0.0254 *
foot (ft) meter (m) 0.3048 *
yard (yd) meter (m) 0.3048 *

Energy \ Power

Convert from:

To:


      

To convert from to multiply by
      
horsepower (hp)
 (550 ft-lb/sec)		 watt (W) 745.6999 E

Velocity

Convert from:

To:


      

To convert from to multiply by
      
mile per hour (mph) kilometer per hour (km/hr) 1.60934
mile per hour (mph) meter per second (m/s) 0.44704
Permeability centimeter per
second (cm/sec)		 0.000968
darcy    
feet per day (ft/day) centimeter per
second (cm/sec)		 0.000352

Flow

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Weight \ Mass

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Mass (weight)
pound (lb)

kilogram (kg) 0.4535924

ton, 2000 lb
kilogram (kg)		 907.1848
 
grain
Mass (weight) per length kilogram (kg) 0.0000648
kip per linear
foot (klf) 		kilogram per meter (kg/m) 0.001488
pound per linear
foot (plf) 		kilogram per meter (kg/m) 1.488
Mass per volume (density)
pound per cubic
foot (pcf) 		kilogram per cubic
meter (kg/cu m)		 16.01846

Volume

Convert from:

To:


       

To convert from to multiply by
      
cubic inch (cu in) cubic meter (cu m) 0.00001639
cubic foot (cu ft) cubic meter (cu m) 0.02831685
cubic yard (cu yd) cubic meter (cu m) 0.7645549
Canada gallon (gal) liter 4.546
Canada gallon (gal) cubic meter (cu m) 0.004546
U.S. gallon (gal) liter 3.7854118
U.S. gallon (gal) cubic meter (cu m) 0.00378541
fluid ounce (fl oz) milliliters (ml) 29.57353
fluid ounce (fl oz) cubic meter (cu m) 0.00002957

Pressure \ Stress

Convert from:

To:


       

To convert from to multiply by
      
kip per square inch (ksi) megapascal (MPa) 6.894757
pound per square foot (psf) kilogram per square meter 
(kg/sq m)		 4.8824
pound per square foot (psf) pascal (Pa) 47.88 
pound per square inch (psi)  pascal (Pa) 6,894.757
pound per square inch (psi) megapascal (MPa) 0.00689476

Temperature

Convert from:

To:


       

To convert from to multiply by
      
degree Fahrenheit (F) degree Celsius (C) tc=(tF-32)/1.8
degree Fahrenheit (F) kelvin (K) tk = (tF+459.7)/1.8
kelvin (K) degree Celsius (C) tc=tk-273.15
Energy and heat
British thermal
unit (Btu)		 joule (J) 1055.056
calorie (cal) joule (J) 4.1868E
Btu/degree F x hr x ft2 W/m2 - degree K 5.678263
kilowatt-hour (kwh) joule (J) 3,600,000E
British thermal
unit per pound (Btu/lb)		 calories per gram
(cal/g)		 0.55556
British thermal unit
per hour (Btu/hr)		 watt (W) 0.2930711
 
* 4 significant digits
**denotes exact conversion