An acre is exactly 43,560 square feet, which is about 4,047 square meters or 0.405 hectares. As a mental picture, it is about three quarters of an American football field including the end zones. A free area converter switches between acres, square feet, square meters and hectares instantly in your browser.
Free area converter. Convert between square meters, square feet, square kilometers, acres, hectares, square miles, and more instantly as you type.
Open Area Converter → Free toolFree acres to hectares converter. Convert acres to hectares instantly (1 acre = 0.404686 hectares). Live result as you type, no sign-up, private.
Open Acres to Hectares Converter →The acre predates metric measurement and does not round neatly: 43,560 square feet, 4,840 square yards, or a rectangle of 660 by 66 feet, the historical furlong by chain. A square acre would be about 208.7 feet on each side. One square mile contains exactly 640 acres, which is why US land descriptions divide so cleanly into quarters and sixteenths of sections.
Most of the world measures land in hectares, and the conversion is 1 hectare = 2.4711 acres, or 1 acre = 0.4047 hectares. Real estate listings mix the units freely across borders, so a converter that handles acres, hectares, square meters and square feet in one place saves the chained arithmetic.
Exactly 640 acres.
A hectare. It equals about 2.47 acres, or 10,000 square meters.
21,780 square feet, roughly 147 feet square if the lot were a perfect square.