256 pennies in one square foot.
16pennies in a row = 12 inches
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144 square inches in 1 square foot.
1.
1 square foot = 0.000022957 acre (rounded) 1 acre = 43,560 square feet
1 square meter = 10.7639 square feet.
1 foot = 12" a square foot is 12" x 12" therefore: 1 sq/ft = 144 sq/in