Appendix B

Useful Conversion Tables

Length Conversions
Area Conversions
Volume Conversions
Borehole, Well Casing & Annular Space Volumes
Flow Rate Conversions
Weight Conversions & Water Density
Miscellaneous

Table 6: Length Conversions

cm m in ft

1 centimetre (cm) = 1 .01 .3937 .0328

1 metre (m) = 100 1 39.37 3.281

1 inch (in) = 2.54 .0254 1 .0833

1 foot (ft) = 30.48 .3048 12 1

1 mile = 5280 ft = 1760 yards = 1.609 km = 1609.3 m

Table 7: Area Conversions

cm² m² in² ft²

1 square centimetre (cm²) = 1 .0001 .155 .00108

1 square metre (m²) = 10,000 1 1,550 10.76

1 square inch (in²) = 6.452 .000645 1 .00694

1 square foot (ft²) = 929 .0929 144 1

1 hectare = 2.471 acres = 10,000 m² = .01 Km² = .00386 mile²

Table 8: Volume Conversions

cm³ m³ l U.S.gal ft³

1 cm³ 1 .000001 .001 .000264 .000035

1 m³ 1,000,000 1 1000 264.17 35.314

1 Litre 1,000 .001 1 .2642 .0353

1 US Gallon 3,785.4 .003785 3.785 1 .1337

1 foot³ 28,317 .028317 28.317 7.481 1

1 US Gal = 4 qts = 8 pints = 16 cups = 128 fl oz = .83269 Imp. Gal
1 Imp Gal = 4 qts = 20 cups = 160 fl oz = 4.546 l = 1.2009 US Gal
1 cup = 8 fl oz (1 US fl oz = 29.574 ml; 1 Imp. fl oz = 28.413 ml)
1 cup (US) = 236.592 ml = 16 tablespoons (tbsp);
1 level tbsp = 0.5 US fl.oz = 14.79 ml = 240 drops

Table 9: Borehole, Well Casing & Annular Space Volumes
6" Borehole 3" Schedule 40 4" Schedule 40

Volume Casing Annulus Casing Annulus

US Gallons/foot 1.5 0.41 0.97 0.65 0.64

Cubic Feet/foot 0.2 0.06 0.13 0.09 0.09

Litres/metre 18.2 5.08 12.0 8.11 7.98

Table 10: Flow Rate Conversions
GPM l/s cfs m³/day

US gallons per minute (GPM) = 1 .0631 .00223 5.42

litres per second (l/s) = 15.85 1 .03531 86.4

cubic feet per second (cfs) = 448.8 28.32 1 2,447

cubic metres per day (m³/day) .183 .0116 .000409 1

Table 11: Weight Conversions and Water Density
gm kg oz lb

1 gram (gm) = 1 .001 .03527 .002205

1 kilogram (kg) = 1000 1 35.27 2.205

1 ounce (oz) = 28.35 .02835 1 .0625

1 pound (lb) = 453.6 .4536 16 1

1 ft³ water weighs 62.4 lbs; 1 m³ water = 2204.5 lbs; 1 litre water weighs 1 Kg; 1 cm³ = 1 gram; 1 IMP Gal = 10 lbs; 1 US gal = 8.3 lbs = 133.5 oz = 3.78 Kg

Miscellaneous:
1 milligram/litre (mg/L) = 1 part/million (ppm)
1% = 10,000 ppm.
Degrees Fahrenheit = (9/5 * Degrees Celcius) + 32
Degrees Celsius = (Degrees Fahrenheit - 32) * 5/9

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