Appendix Conversion Factors - USEPA/ATtILA2 GitHub Wiki

Conversion Factors

These tables were copied from the Esri document, 'ArcGIS Pro 2.8 Projected Coordinate Systems Tables'. It is available for download at:

https://pro.arcgis.com/en/pro-app/2.8/help/mapping/properties/pdf/projected_coordinate_systems.pdf

Conversion factors to convert to square meters

Area Unit of Measure Name Conversion Factor
150_Kilometers 22500000000.0
50_Kilometers 2500000000.0
Centimeter 0.0001
Chain 404.68564224
Chain_Benoit_1895_A 404.68493412895
Chain_Benoit_1895_B 404.684937926029
Chain_Clarke 404.678379705448
Chain_Sears 404.684238955715
Chain_US 404.687260987426
Decimeter 0.01
Fathom 3.34450944
Foot 0.09290304
Foot_1865 0.092903548000694
Foot_Benoit_1895_A 0.092902877440071
Foot_Benoit_1895_B 0.09290287831176
Foot_British_1936 0.092903496651921
Foot_Clarke 0.09290137275148
Foot_Gold_Coast 0.092902863326732
Foot_Indian 0.09290274144751
Foot_Indian_1937 0.092902070738528
Foot_Indian_1962 0.09290279616016
Foot_Indian_1975 0.09290273520025
Foot_Sears 0.092902717850256
Foot_US 0.092903411613275
Inch 0.00064516
Inch_US 0.000645162580648
Kilometer 1000000.0
Link 0.040468564224
Link_Benoit_1895_A 0.040468493412895
Link_Benoit_1895_B 0.040468493792603
Link_Clarke 0.040467837970545
Link_Sears 0.040468423895572
Link_US 0.040468726098743
Meter 1.0
Meter_German 1.00002719318486
Mile_US 2589998.47031953
Millimeter 0.000001
Nautical_Mile 3429904.0
Nautical_Mile_UK 3434290.937856
Nautical_Mile_US 3434528.149504
Rod 25.29285264
Rod_US 25.2929538117141
Statute_Mile 2589988.110336
Yard 0.83612736
Yard_Benoit_1895_A 0.83612589696064
Yard_Benoit_1895_B 0.836125904805841
Yard_Clarke 0.836112354763322
Yard_Indian 0.836124673027593
Yard_Indian_1937 0.836118636646753
Yard_Indian_1962 0.83612516544144
Yard_Indian_1975 0.83612461680225
Yard_Sears 0.836124460652307
Yard_Sears_1922_Truncated 0.836123702404
Yard_US 0.836130704519474

Conversion factors to convert to meters

Linear Unit of Measure Name Conversion Factor
150_Kilometers 150000.0
50_Kilometers 50000.0
Centimeter 0.01
Chain 20.1168
Chain_Benoit_1895_A 20.1167824
Chain_Benoit_1895_B 20.1167824943759
Chain_Clarke 20.11661949
Chain_Sears 20.1167651215526
Chain_US 20.1168402336805
Decimeter 0.1
Fathom 1.8288
Foot 0.3048
Foot_1865 0.304800833333333
Foot_Benoit_1895_A 0.304799733333333
Foot_Benoit_1895_B 0.304799734763271
Foot_British_1936 0.3048007491
Foot_Clarke 0.304797265
Foot_Gold_Coast 0.304799710181509
Foot_Indian 0.304799510248147
Foot_Indian_1937 0.30479841
Foot_Indian_1962 0.3047996
Foot_Indian_1975 0.3047995
Foot_Sears 0.304799471538676
Foot_US 0.304800609601219
Inch 0.0254
Inch_US 0.0254000508001016
Kilometer 1000.0
Link 0.201168
Link_Benoit_1895_A 0.201167824
Link_Benoit_1895_B 0.201167824943759
Link_Clarke 0.2011661949
Link_Sears 0.201167651215526
Link_US 0.201168402336805
Meter 1.0
Meter_German 1.0000135965
Mile_US 1609.34721869444
Millimeter 0.001
Nautical_Mile 1852.0
Nautical_Mile_UK 1853.184
Nautical_Mile_US 1853.248
Rod 5.0292
Rod_US 5.02921005842012
Statute_Mile 1609.344
Yard 0.9144
Yard_Benoit_1895_A 0.9143992
Yard_Benoit_1895_B 0.914399204289812
Yard_Clarke 0.914391795
Yard_Indian 0.914398530744441
Yard_Indian_1937 0.91439523
Yard_Indian_1962 0.9143988
Yard_Indian_1975 0.9143985
Yard_Sears 0.914398414616029
Yard_Sears_1922_Truncated 0.914398
Yard_US 0.914401828803658

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