Conversion constants
- 1. Converting from imperial units Multiply by to obtain acres 0.4046856 hectares acres 43560.0 * square feet acres 4046.856 square meters acres 0.0015625* square miles acres 4840.0* square yards feet 30.48* centimeters feet 0.0003048* kilometers feet² 0.3048* meters feet U.S. survey foot 0.304800609601º meters feet 0.00018939394 miles feet 304.8* millimeters square feet 0.000022956 acres square feet 929.0304* square centimeters square feet 0.09290304* square meters square feet 0.00000003587 square miles inches 2.54* centimeters inches 0.0254* meters inches 0.000015782 miles inches 25.4* millimeters inches 0.027777778 yards square inches 6.4516* square centimeters square inches 0.00064516* square meters square inches 645.16* square millimeters miles 160934.4* centimeters miles 5280.0* feet miles 63360.0* inches miles 1.609344* kilometers miles 1609.344* meters miles 1760.0* yards miles 1.15077945 nautical miles³ square miles 640.0* acres square miles 27878400.0* square feet square miles 2.589988110647 square kilometers yards 914.4* millimeters yards 91.44* centimeters yards 0.0009144* kilometers yards 0.9144* meters yards 0.000568182 miles square yards 0.000206611 acres square yards 0.83612736* square meters square yards 0.0000003228305 square miles
- 2. Converting from metric units Multiply by to obtain centimeters 0.03280839895 feet centimeters 0.3937007874 inches centimeters 0.00001* kilometers centimeters 0.01* meters centimeters 0.000006213711922 miles centimeters 10.0* millimeters centimeters 0.01093613298 yards square centimeters 0.001076391042 square feet square centimeters 0.15500031 square inches hectares 2.471054073 acres hectares 107639.1042 square feet kilometers 1000000.0* millimeters kilometers 100000.0* centimeters kilometers 1000.0* meters kilometers 1093.613298 yards kilometers 3280.839895 feet kilometers 39370.07874 inches kilometers 0.6213711922 miles square kilometers 247.1054 acres square kilometers 10763910.42 square feet square kilometers 0.386102158496 square miles meters 100.0* centimeters meters 3.280839895 feet meters 3.28083333333¹ feet U.S.survey foot meters 39.37007874 inches meters 0.001* kilometers meters 0.0006213711922 miles meters 1000.0* millimeters meters 1.093613298 yards square meters 0.0002471054 acres square meters 10.76391042 square feet square meters 0.0000003861003 square miles millimeters 0.1* centimeters millimeters 0.003280839 feet millimeters 0.03937007874 inches millimeters 0.000001* kilometers millimeters 0.001* meters millimeters 0.0000006213711922 miles millimeters 0.001093613298 yards square millimeters 0.00001076391042 square feet Converting geographic (angular) units Multiply by to obtain degrees 1.111111111 grads degrees 0.017453292 radians grads 0.9* degrees grads 0.015707963 radians radians 57.2958 degrees radians 63.662 grads
- 3. U.S. survey foot U.S. survey values Multiply by to obtain acres 0.4046873 hectares acres 10.0* square chains acres 43560.0* square feet acres 4046.873 square meters acres 0.0015625* square miles acres 160.0* square rods chains 66.0* feet chains 100.0* links chains 20.11684 meters chains 0.0125* miles chains 4.0* rods square chains 0.1* acres square chains 0.04046873 hectares square chains 4356.0* square feet square chains 404.6873 square meters square chains 0.00015625* square miles square chains 16.0* square rods feet 0.01515152 chains feet 1.515152 links feet 0.304800609601º meters feet 0.00018939394 miles feet 0.06060606 rods square feet 0.00002295684 acres square feet 0.000009290341 hectares square feet 0.00000003587006 sections square feet 0.0002295684 square chains square feet 0.09290341 square meters square feet 0.00000003587006 square miles square feet 0.003673095 square rods square feet 0.0000000009963907 townships hectares 2.471044 acres hectares 24.71044 square chains hectares 107638.7 square feet hectares 10000.0* square meters hectares 0.003861006 square miles hectares 395.367 square rods links 0.01* chains links 0.66* feet links 0.2011684 meters links 0.000125* miles links 0.04* rods meters 0.0497096 chains meters 3.28083333333¹ feet meters 4.97096 links meters 0.0006213699 miles meters 0.1988384 rods square meters 0.0002471044 acres square meters 0.0001* hectares square meters 0.0000003861006 sections square meters 0.002471044 square chains
- 4. square meters 10.76387 square feet square meters 0.0000003861006 square miles square meters 0.0395367 square rods square meters 0.000000010725 townships miles 80.0* chains miles 5280.0* feet miles 8000.0* links miles 1609.347 meters miles 320.0* rods square miles 640.0* acres square miles 258.9998 hectares square miles 1.0* sections square miles 6400.0* square chains square miles 27878400.0* square feet square miles 2589998 square meters square miles 102400.0* square rods square miles 0.027777778 townships rods 0.25* chains rods 16.5* feet rods 25.0* links rods 5.02921 meters rods 0.003125* miles square rods 0.00625* acres square rods 0.002529295 hectares square rods 0.00625* square chains square rods 272.25* square feet square rods 25.29295 square meters square rods 0.000009765625* square miles sections 27878400.0* square feet sections 2589998 square meters sections 1.0* square miles sections 0.027777778 townships townships 36.0* sections townships 1003622400.0* square feet townships 93239945 square meters townships 36.0* square miles * Constants are exact. º A coordinate system in ‘U.S. survey feet’ may be converted to a coordinate system in meters by scaling the system to a scale factor of 0.304800609601. An exact conversion can be accomplished by multiplying ‘U.S. survey feet’ by the fraction 1200/3937. ¹ A coordinate system in meters may be converted to a coordinate system in ‘U.S. survey feet’ by scaling the system to a scale factor of 3.28083333333. An exact conversion can be accomplished by multiplying meters by the fraction 3937/1200. ² The foot is one-third of the Imperial standard yard, which is defined to be 0.9144 meters, exactly. Thus the foot is defined as 0.3048 meters, exactly. ³ Represents the international nautical mile and also the U.S. nautical mile. The international nautical mile is defined to be 1852 meters, exactly. However, the U.K. nautical mile is defined to be the average distance on the earth’s surface subtended by one minute of latitude, thus being 6080 feet, exactly, or 1853.184 meters, exactly.