Before converting 400 feet by 400 feet to acres lets understand basic conversion of both land measurement units.
We know 1 acre is equal to 43,560 square feet. So 1 square feet is equal to 1/43,560 acres.
We have 400 by 400 square feet that means it is equal to 1,60,000 square feet.
400 by 400 square feet = 400 x 400 square feet = 1,60,000 square feet
To convert square feet into acre we will use following formula.
Acre = Square feet / 43,560
Lets put values
400 by 400 square feet = 1,60,000/43,560 acres
400 by 400 square feet = 3.67309458219 acres
So 400 by 400 square feet is equal to 3.67 acres approximately.
Area Converter for X feet by Y feet to acres