Area Converter

Area units split cleanly into two worlds that rarely need to talk to each other, until they do: everyday metric and imperial units like square meters and square feet on one side, and land-specific units like acres, hectares, roods, and townships on the other, each with its own history in property and surveying rather than general measurement. This converter covers 20 units spanning both, including the US land-survey units — sections and townships — that show up specifically in property descriptions and old deeds, and the barn, an intentionally tiny unit from nuclear physics used for measuring the cross-sectional area of atomic particles, included here mostly because it's a real, still-used unit that most converters skip entirely.

Type a value into either field and the other calculates instantly, with a swap button to reverse direction. Everything routes through square meters as the common base and has been checked against known values — an acre correctly converts to 4,046.856 m² here, and a hectare to roughly 2.471 acres, both exact rather than rounded.

Dedicated pages for the pairs people look up most — acres to hectares, square meters to square feet, square kilometers to square miles — are linked below, each preloaded with that conversion. As with every converter here, this is plain client-side arithmetic with no external service involved and nothing recorded.