Now that you know about conversion from square yards to acres, let's see how to convert the other way around. How many square yards in an acre? Exactly 4,840 yd2.
Here you'll find some information on how areas were calculated in medieval times. An acre is a land area unit, and it corresponds to about 40% of a hectare. How can we be more precise? One acre is 43,560 square feet or 4,047 m2.
The word "acre" comes from Old English æcer. Its primal meaning was an open field. In medieval Britain, people counted the size of farms and landed properties in acres. On the other hand, in the US, square miles gained more popularity.
If you need a more modern comparison to an acre in size, think of a football field. To convert square feet to acres you need to multiply the number of acres by 43,560, while the size of a football field estimated with surface area calculator is 48,000 ft2.