How big is an acre? Wildfire sizes explained

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Wildfires are typically described with the number of acres burned, but how big is an acre? We explain (KGO-TV)

Wildfires are typically described in terms of the number of acres burned. Mathematically, an acre is equal to 43,560 square feet.

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That's approximately the size of a football field, minus the end zones.
For comparison, the City of San Francisco, at 46.87 square miles, is nearly 30,000 acres.

Yosemite National Park covers 761,266 acres.

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