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Conversion Calculators

Conversion Factors for SI and non-SI Units (2003-12-08) All the units, all the measures, from electrical conductivity and concentration to temperature and volume

To convert Column 1 into Column 2 multiply byColumn 1 SI UnitColumn 2 non-SI UnitTo convert Column 2 into Column 1 multiply by
Electrical Conductivity, Electricity and Magnetism
10siemen per meter, S m-1milimho per centimeter, mmho cm-10.1
104tesla, Tgauss, G04-okt
Water Measurement
9.73 x 10-3cubic meter, m3acre-inches, acre-in102.8
9.81 x 10-3cubic meter per hour, m3 h-1cubic feet per second, ft3 s-1101.9
4.40cubic meter per hour, m3 h-1US gallons per minute, gal min-10.227
8.11hectare-meters, ha-macre-feet, acre-ft0.123
97.28hectare-meters, ha-macre-inches, acre.in1.03 x 10-2
8.1 x 10-2hectare-centimeters, ha-cmacre-feet, acre-ft12.33
Concentrations
1centimole per kilogram, cmol kg-1 (ion exchange capacity)milliequivalents per 100 grams, meq 100g-11
0.1gram per kilogram, g kg-1percent, %10
1milligram per kilogram, mg kg-1parts per million, ppm1
Plant Nutrient Conversion
ElementalOxide 
2.29PP2O50.437
1.20KK2O0.830
1.39CaCaO0.715
1.66MgMgO0.602
Mass
2.20 x 10-3gram, g (10-3 kg)pound, lb454
3.52 x 10-2gram, g (10-3 kg)ounce, (avdp), oz28.4
2.205kilogram, kgpound, lb0.454
0.01kilogram, kgquintal (metric), q100
1.10 x 10-3kilogram, kgton (2000 lb), ton907
1.102megagram, Mg (tonne)ton (US), ton0.907
1.102tonne, tton (US), ton0.907
Yield and Rate
0.893kilogram per hectare, kg ha-1pound per acre, lb acre-11.12
7.77 x 10-2kilogram per cubic meter, kg m-3pound per bushel, lb bu-112.87
1.49 x 10-2kilogram per hectare, kg ha-1bushel per acre, 60lb67.19
1.59 x 10-2kilogram per hectare, kg ha-1bushel per acre, 56 lb62.71
1.86 x 10-2kilogram per hectare, kg ha-1bushel per acre, 48 lb53.75
0.107liter per hectare, L ha-1gallon per acre9.53
893tonnes per hectare, t ha-1pound per acre, lb acre-11.12 x 10-3
893megagram per hectare, Mg ha-1pound per acre, lb acre-11.12 x 10-3
0.446megagram per hectare, Mg ha-1ton (2000 lb) per acre, ton acre-12.24
2.24meter per second, m s-1mile per hour0.447
Pressure
9.90megapascal, MPa (106 Pa)atmosphere0.101
10megapascal, MPa (106 Pa)bar0.1
2.09 x 10-2pascal, Papound per square foot, lb ft-247.9
1.45 x 10-4pascal, Papound per square foot, lb in-26.90 x 103
Temperature
1.00 (K - 273)Kelvin, KCelsius, oC1.00 (oC + 273)
(9/5 oC) + 32Celsius, oCFahrenheit, oF5/9 (oF - 32)
Transpiration and Photosynthesis
3.60 x 10-2milligram per square meter second, mg m-2 s-1gram per square decimeter hour, g dm-2 h-127.8
5.56 x 10-3milligram (H2O) per square meter second, mg m-2 s-1micromole (H2O) per square centimeter second, mmol cm-2 s-1180
10-4milligram per square meter second, mg m-2 s-1milligram per square centimeter second, mg cm-2 s-1104
35.97milligram per square meter second, mg m-2 s-1milligram per square decimeter hour, mg dm-2 h-12.78 x 10-2
Length
0.621kilometer, km (103 m)mile, mi1.609
1.094meter, myard, yd0.914
3.28meter, mfoot, ft0.304
1.0micrometer, mm (10-6 m)micron, m1.0
3.94 x 10-2millimeter, mm (10-3 m)inch, in25.4
10nanometer, nm (19-9 m)Angstrom, Å0.1
Area
2.47hectare, haacre0.405
247square kilometer, km2 (103 m)2acre4.05 x 10-3
0.386square kilometer, km2 (103 m)2square mile, mi22.590
2.47 x 10-4square meter, m2acre4.05 x 103
10.76square meter, m 2square foot, ft 29.29 - 10-2
1.55 x 10-3square millimeter, mm2  (10-6 m)2square inch, in2645
Volume
9.73 x 10-3cubic meter, m3acre-inch102.8
35.3cubic meter, m3cubic foot, ft32.83 x 10-2
6.10 x 104cubic meter, m3cubic inch, in31.64 x 10-5
2.84 x 10-2liter, L (10-3 m3)bushel, bu35.24
1.057liter, L (10-3 m3)quart (liquid), qt0.946
3.53 x 10-2liter, L (10-3 m3)cubic foot, ft328.3
0.265liter, L (10-3 m3)gallon3.78
33.78liter, L (10-3 m3)ounce (fluid), oz2.96 x 10-2
2.11liter, L (10-3 m3)pint (fluid) pt0.473

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