1 kilometer = 0.621371192 mile
1 kilometer = 1000 meters
1 kilometer = 100000 centimeters
1 kilometer = 3280.8399 feet
1 kilometer = 1093.6133 yards
1 kilometer = 39370.0787 inches
1 kilometer = 0.539956803 nautical mile

1 meter = 0.000621371192 mile
1 meter = 0.001 kilometer
1 meter = 100 centimeters
1 meter = 3.2808399 feet
1 meter = 39.3700787 inches
1 meter = 1.0936133 yards
1 meter = 0.000539956803 nautical mile

1 yard = 0.0009144 kilometers
1 yard = 0.9144 meters
1 yard = 91.44 centimeters
1 yard = 3 feet
1 yard = 36 inches
1 yard = 0.000493736501 nautical mile

1 feet = 0.000189393939 miles
1 feet = 0.0003048 kilometers
1 feet = 0.3048 meters
1 feet = 30.48 centimeters
1 feet = 0.333333333 yard
1 feet = 12 inch
1 feet = 0.000164578834 nautical mile

1 inch = 0.00000254 kilometer
1 inch = 0.0254 meters
1 inch = 2.54 centimeters
1 inch = 0.0833333333 feet
1 inch = 0.00000157828283 mile
1 inch = 0.0277777778 yard

1 hectare = 0.01 square kilometer
1 hectare = 10000 square meters
1 hectare = 2.47105381 acre
1 hectare = 107639.104 square feet

1 square meter = 0.0000001 square kilometer
1 square meter = 0.0000000386102159 square mile
1 square meter = 0.0001 hectare
1 square meter = 0.000247105381 acre
1 square meter = 10.7639104 square feet

1 acre = 4046.85642 square meters
1 acre = 0.00404685642 square kilometer
1 acre = 0.0015625 square mile
1 acre = 43560 square feet
1 acre = 0.404685642 hectare

1 square foot = 0.000000009290304 square kilometer
1 square foot = 0.09290304 square meter
1 square foot = 0.00000000358700643 square mile
1 square foot = 000000.229568411 acres

1 pound = 0.45359237 kilograms
1 pound = 453.59237 grams

1 US gallon = 3.7854118 litres
1 US gallon = 3785.4118 ml
1 US gallon = 0.0037854118 cubic meter
1 US gallon = 4 US quarts

1 US quart = 0.94635295 litre
1 US quart = 946.35295 ml
1 US quart = 0.00094635295 cubic meter
1 US quart = 0.25 US gallon

1 litre = 1000 ml
1 litre = 1.0566882 US quart
1 litre = 0.264172051 US gallon
1 decalitre = 10 liters

1 cubic meter = 264.172051 US gallons
1 cubic meter = 1000 litres
1 cubic meter = 1000000 ml
1 cubic meter = 1056.6882 US quarts

1 Barrel of water = 42 US gallons
1 Barrel of water = 158.9872956 litres

1 Barrel of Oil = 55 US gallons
1 Barrel of Oil = 208.197649 litres