U.S. customary weights and measures incovenient forever?

Though I have been using U.S. weights and measures daily for five years now, I am still not used to them. I feel like I need a calculator every time I watch a weather forecast to really get an idea of what to wear, or when I go to buy a small amount of a deli product to ask for the right amount. Performance of our garage door opener is rated in horsepower. When I am sick I have to think hard if a temperature of 103 degrees F is too high or not.

As a mathematics teacher I can see how difficult it is for American students to remember equivalences between U.S. weights and measures. I think they would be delighted to work with the metric system only.

You may find the following overview useful to get an idea of the most used U.S. customary units.

Linear measures

1 foot [ft]	=	12 inches [in]
1 yard [yd]	=	3 feet
1 land mile	=	5,280 feet

Liquid measures

1 gallon [gal]	=	4 quart [qt]
1 quart [qt]	=	2 pints
	=	32 fluid ounces [fl. oz]
1 fluid ounce	=	8 fluid drams
1 gallon	=	16 cups
1 cup	=	8 fluid ounces
1 tablespoon	=	3 teaspoon
	=	0.5 fluid ounces
1 teaspoon	=	1.33 fluid drams

Weight measures

1 pound [lb]	=	16 ounces [oz]
	=	7,000 grains
1 carat	=	3.09 grains

Temperature measures

temperature of freezing water	=	0 degrees Celsius
	=	32 degrees Fahrenheit
temperature of  boiling water	=	100 degrees Celsius
	=	212 degrees Fahrenheit

Conversions

Isn't it much easier to remember relations between units of the metric system where multiples of power of ten simplify the process?

Here is an approximate guide for you to make U.S. Standard /~Metric conversions:

centimeter	x	2.54	=	inch
meter	x	0.3	=	foot
	x	0.9	=	yard
kilometer	x	1.6	=	mile
liter	x	0.9	=	quart
	x	3.79	=	gallon
cubic meter	x	0.004	=	gallon
gram	x	28.3	=	ounce
milligram	x	200	=	carat
kilogram	x	0.45	=	pound
degree Celsius	x	5/9	=	degree Fahrenheit
kilowatt	x	0.7	=	horsepower

As I deal with these conversions on daily basis, I wish all countries would begin to use the same convenient Metric system of units.