Area
Square centimetres		=		Square inches
Square inches		=		Square centimetres
Square feet		=		Square metres
Square metres		=		Square feet
Square kilometres		=		Square miles
Square miles		=		Square kilometres
Distance
Centimetres		=		Inches
Inches		=		Centimetres
Feet		=		Metres
Metres		=		Feet
Kilometres		=		Miles
Miles		=		Kilometres
Weights
Grams		=		Ounces
Ounces		=		Grams
Kilograms		=		Pounds
Pounds		=		Kilograms
Volume
Litres		=		Pints
Pints		=		Litres
Gallon		=		Litres
Litres		=		Gallon
Cubic metres		=		Cubic feet
Cubic feet		=		Cubic metres
Cubic centimetres		=		Cubic inches
Cubic inches		=		Cubic centimetres
Misc
Fahrenheit		=		Celsius
Celsius		=		Fahrenheit