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Enheder -
Enhedsomregner - Engelske arealenheder
1 square foot = 144 square inches
1 square yard = 9 square feet = 1296 square inches
1 square pole = 1 square rod = 1 square perche = 30,25 square yards
1 rood = 40 square rods
1 acre = 4840 square yards = 4 roods = 10 square chains
1 square mile = 640 acres
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