Convert m², km², hectare, are, ft², acre, square mile and the Brazilian alqueire — full equivalence table in your browser.
Converting an area is a single multiplication, but only if you have the right factor at hand — and the ones people need most are rarely round numbers. This converter takes any value in one unit and shows it in thirteen: mm², cm², m², are, hectare, km², in², ft², yd², acre, mi² and the alqueire paulista and mineiro. Internally every conversion passes through the square metre as a pivot: the input is multiplied by the factor of its own unit to get m², then divided by the factor of the target unit. The imperial factors are the exact legal definitions, not rounded approximations — one square foot is exactly 0.09290304 m² and one acre is exactly 4,046.8564224 m², both derived from the international yard of 0.9144 m fixed in 1959.
The alqueire needs a warning the other units do not, and the tool shows it on screen whenever an alqueire is selected. It is a traditional Brazilian land measure that was never given a single legal value: the alqueire paulista, used in São Paulo, Paraná and Mato Grosso do Sul, is 24,200 m² (2.42 ha, a plot of 100 by 242 braças), while the alqueire mineiro or geométrico, used in Minas Gerais, Goiás and Rio de Janeiro, is exactly double that at 48,400 m² (4.84 ha). Other regions carry their own variants — the alqueire do Norte and the baiano among them — so a listing that says "50 alqueires" can mean very different farms depending on where it was written. Official registries and INCRA work in hectares precisely to avoid this ambiguity.
Practical uses show up daily: reading a rural property listing in alqueires and working out the hectares, converting a lot size from square metres to square feet for a foreign client or a marketplace, sizing flooring, paint or turf from a plan drawn in cm², checking the hectares declared in a CAR registration, or making sense of an acre figure in an American document. The table gives you all of them in one pass, so you never have to run the conversion twice. The whole calculation is a handful of multiplications performed in JavaScript on your device — no upload, no account, nothing stored.
Everything is converted through the square metre: m² = value × factor of the source unit, and result = m² ÷ factor of the target unit. Factors: 1 a = 100 m² · 1 ha = 10,000 m² · 1 km² = 1,000,000 m² · 1 in² = 0.00064516 m² · 1 ft² = 0.09290304 m² · 1 yd² = 0.83612736 m² · 1 acre = 4,046.8564224 m² · 1 mi² = 2,589,988.110336 m² · 1 alqueire paulista = 24,200 m² · 1 alqueire mineiro = 48,400 m².
Exactly 10,000 m² — a square of 100 m by 100 m. One hectare also equals 100 ares, 0.01 km² and about 2.4711 acres.
It depends on the region, and this is the single most common mistake in Brazilian land deals. The alqueire paulista is 24,200 m² (2.42 ha) and the alqueire mineiro is 48,400 m² (4.84 ha) — twice as much. Both are in the table here; always confirm which one a deed, listing or contract refers to.
One acre is exactly 4,046.8564224 m², or about 0.4047 hectare. Conversely, one hectare is about 2.4711 acres.
Because it began as a measure of how much land a given quantity of seed would sow, which naturally differed with soil and crop, and it was never standardized by law. Modern land registries and INCRA use hectares for exactly this reason.
No. The conversion is pure JavaScript running on your device — nothing is uploaded, transmitted or stored on any server.
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