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A note on the metric system:

Before you use this table, convert to the base measurement first, in that convert centi-meters to meters, convert kilo-grams to grams. In this way, I don't have to list every imaginable combination of metric units.

The notation 1.23E - 4 stands for 1.23 x 10-4 = 0.000123.

 

from \ to = __ feet = __ inches = __ meters = __ miles = __ yards
foot   12 0.3048 (1/5280) (1/3)
inch (1/12)   0.0254 (1/63360) (1/36)
meter 3.280839... 39.37007...   6.213711...E - 4 1.093613...
mile 5280 63360 1609.344   1760
yard 3 36 0.9144 (1/1760)  

To use: Find the unit to convert from in the left column, and multiply it by the expression under the unit to convert to.
Examples: foot = 12 inches; 2 feet = 2x12 inches.

Useful Exact Length Relationships

mile = 1760 yards = 5280 feet
yard = 3 feet = 36 inches
foot = 12 inches
inch = 2.54 centimeters


Information supplied by http://www.math2.org