Math2.org Math Tables: Unit Conversion Tables for Areas

(Math)

Preliminary note:
Before you use this table, convert to the base measurement first, in that convert centimeters to meters, convert kilograms to grams. In this way, I don't have to list every imaginable combination of metric units.

from \ to = __ acres = __ feet2 = __ inches2 = __ meters2 = __ miles2 = __ yards2
acre   43560 6272640 4046.856... 1/640 4840
foot2 1/43560   144 0.09290304 1/27878400 1/9
inch2 1/6272640 1/144   6.4516E-4 2.490976E-10 1/1296
meter2 2.471054...E-4 10.76391... 1550.0031   3.861021...E-7 1.195990...
mile2 640 27878400 4014489600 2.589988...E + 6   3097600
yard2 1/4840 9 1296 0.83612736 3.228305...E-7  

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

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:
foot2 = 144 inches2
2 feet2 = 2x144 inches2

Useful Exact Area & Length Relationships

acre = (1/640) miles2 = 43560 foot2
mile = 1760 yards = 5280 feet
yard = 3 feet = 36 inches
foot = 12 inches
inch = 2.54 centimeters

Hints

Note that when converting area units:

1 foot = 12 inches
(1 foot)2 = (12 inches)2 (square both sides)
1 foot2 = 144 inches2
The linear & area relationships are not the same!