Conversion Tables

Length

  To convert from (SI)       Conversion factor     To get U.S. Customary

  Meters (m)                 Multiply by 3.28      Feet (ft)
  Meters                     Multiply by 1.094     Yards
  Meters per second (m/s)    Multiply by 2.237     Miles per hour (mph)
  Centimeters (cm)           Multiply by 0.39      Inches (in)
  Milimeters (mm)            Divide by 25.4        Inches
  Kilometers (km)            Divide by 1.608       Miles (mi)
  m3/(m2-day) =m/day         Multiply by 24.6      gpd/ft2

Area

  To convert from (SI)       Conversion factor     To get U.S. Customary

  cm2                        Divide by 6.45        Square inch
  m2                         Multiply by 10.76     Square foot (ft2)
  Hectare (ha=10 000 m2)     Multiply by 2.46      Acre
  km2 (=100 ha=106 m2)       Multiply by 0.387     Square mile

Volume

  To convert from (SI)       Conversion factor     To get U.S. Customary

  Liters (=1 dm3)            Divide by 28.3        Cubic foot (ft3)
  m3                         Multiply by 35.4      ft3
  Liters                     Divide by 3.78        U.S. gal
  Liters                     Divide by 4.54        Imp. gal
  Liters/(s-ha)              Multiply by 0.014     Inches/hour
  m3                         Divide by 3780        Million U.S. gal (mg)
  m3                         Multiply by 8.54      Barrel
  m3                         Divide by 1 230       Acre-ft
  Liters/s                   Divide by 43.75       Million gal/day (mgd)
  Liters/s                   Multiply by 15.87     gal/min (gpm)
  Liters/m3                  Divide by 40.76       gal/ft3

Mass

  To convert from (SI)       Conversion factor     To get U.S. Customary

  Gram (g)                   Divide by 454         Pounds (lb)
  Gram                       Multiply by 15.43     Grain
  Kilogram(kg=1000 g)        Multiply by 2.2       Pounds
  Newton (=0.1 kgb)          Multiply by 0.225     Pounds
  Metric ton (=1000 kg)      Multiply by 1.1       U.S. ton
  Metric ton                 Multiply by 0.98      English ton

Concentration

  To convert from (SI)       Conversion factor     To get U.S. Customary

  Milligram per liter        Multiply by 1.0       Parts per million (ppm)
  (mg/liter=g/m3)	
  mg/liter                   Divide by 2.29        Grain/ft3
  Microgram per liter        Multiply by 1.0       Parts per billion (ppb)
  (ug/liter=10-3 g/m3)

Density

  To convert from (SI)       Conversion factor      To get U.S. Customary

  kg/m2                       Divide by 16            lb/ft3
  g/m2                        Multiply by 6.24x10-5   lb/ft3
  m2 /kg                      Multiply by 16.03       ft3/lb

Pressure

  To convert from (SI)       Conversion factor      To get U.S. Customary

  g/m2                        Divide by 4 885        lb/ft2 
  Bar (=105 N/m2 )            Multiply by 14.2       psi (=lb/in.2 )
  kg/m2                       Divide by 4.89         lb/ft2 
  kg/cm2                      Multiply by 14.49      psi

Energy

  To convert from (SI)       Conversion factor      To get U.S. Customary

  Watt (W=N x m/s)           Multiply by 3.41       Btu/hr
  Kilowatts (kW=1000 W)      Multiply by 1.34       Horsepower (hp)
  Kilowatt-hours (kW-hr)     Multiply by 3 409.5    Btu
  W/m3                       Multiply by 5          hp/mg
  kW-hr/(m2 x °C)            Multiply by 176        Btu/ft2/°F
  kW-hr/(m3 x °C)            Multiply by 53.6       Btu/ft3/°F
  Calories (gram)            Divide by 252          Btu
  1 calorie = 1.16 x 10-6 kW-hr	
  Degree celsius (°C)        Multiply °C by 1.8     Degrees Fahrenheit (°F) 
                             and add 32

Some constants

  1 m3 of water weighs 1 000 kg.
  1 ft3 of water weighs 62.4 lb.
  1 U.S. gal of water weighs 8.34 lb.
  1 Imp. (English) gal of water weighs 10 lb.
  1 day has 1 440 minutes and 86 400 seconds.

a - Metric kilograms in this table are weight kilograms which equal 9.81 (m/s2) x kg (mass) = 9.81 Newtons.

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Computational Hydraulics Int.
147 Wyndham St. N., Ste. 202
Guelph, Ontario
N1H 4E9
Canada

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Fax: 519-489-0695

info@chiwater.com