1 kilometer (km) = 1,000 meters (m)

1 meter  =  10 decimeters (dm)
1 meter  =   100 centimeters (cm)
1 meter  = 1,000 millimeters (mm)

1 decimeter   =  10 centimeters

1 centimeter  =  10 millimeters
1 square meter (m2)                                         
= 100 square decimeters (dm2)
= 10 decimeters (dm)     
= 10,000 square centimeters (cm2)

1 square decimeter                                           
=  100 square centimeters (cm2)
1 square kilometer                                            =
1,000,000 square  meters         
1 cubic meter (m3)  
= 1,000 cubic decimeters (dm3)
=  1,000,000 cubic  centimeters (cm2)


1 cubic decimeter   
=  1,000 cubic  centimeters
1 kiloliter (kL)  = 1,000 liters (L)

1 liter   = 1,000 milliters (mL)

1 cubic centimeter   = 1 millilter
1 metric ton (t)  = 1,000 kilograms (kg)

1 kilogram    = 1,000 grams (g)

1 gram  =  1,000 milligrams (mg)
1 mile (mi)     = 1,760 yards (yd)
       = 5,280 feet (ft)

1 yard            =  3 feet
       = 36 inches (in.)

1 foot             = 12 inches
1 cubic yard (yd2)   = 9 square feet (ft2)
             = 1,296 square inches (in.2)

1 square foot    = 144 square inches

1 acre     =  43,560 square feet

1 square mile (mi2)  = 640 acres
1 cubic  yard (yd3) = 9 cubic feet (ft3)

1 cubic foot    = 1,728 cubic inches (inchs
(in.3)
1 gallon (gal) = 4 quarts (gt)

1 squart        = 2 pints (pt)

1pint             = 2 cups (c)

1 cup            = 8 fluid ounces (fl oz)

1fluid once    = 2 tablespoons (tlbs)

tablespoon   = 3 teaspoons (tsp)
1 inch is about 2.5 cm (2.54)

1 kilometer is about 0.6 miles

1 mile is about 1.6 kilometers ( 1.609)

1 meter  is about  39.37 inches or 3.28 feet
Units - Metric and Customary Units
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