Calculate the area of a plot of land in square meters, and convert it instantly to square feet, acres, and hectares.
📂 Site, Structure & Exterior CalculatorsFill in the fields on the left with your project's measurements, then press the button to see your result instantly. No sign-up required, and no data is sent anywhere — everything is calculated right in your browser.
This tool calculates the area of a plot of land in several common shapes — rectangle, square, triangle, circle, or trapezoid — using the basic geometric formula appropriate for each shape, then automatically converts the result into four different units of measurement commonly used for land: square meters, square feet, acres, and hectares. This instant multi-unit conversion is genuinely useful in practice because property documents and land plans use different units depending on the country and specific context — some countries record square meters in official title documents while others use acres or hectares, particularly for larger agricultural or rural land parcels, and being able to see all four units at once avoids the need for a separate manual conversion step that introduces its own risk of error. Selecting the appropriate shape from the list shows only that shape's relevant input fields, making the tool straightforward to use for any of the supported land shapes without cluttering the interface with irrelevant fields for shapes not currently being calculated.
Land area measurement carries an unusually large number of coexisting units compared to most other measurements, and the reason traces back through centuries of regional agricultural and legal history rather than any single standardization effort — each unit emerged from a different practical context that made sense at the time and place it originated.
The acre, still standard in the United States, United Kingdom, and several other countries for land measurement, traces back to medieval England, where it originally represented roughly the area a team of oxen could plow in a single day — a practical, if imprecise by modern standards, agricultural reference that later got formalized into an exact measurement (43,560 square feet) once precise surveying became common.
The hectare, part of the metric system and used throughout most of Europe, Latin America, and much of Asia and Africa for both agricultural and general land measurement, is defined simply as 10,000 square meters — a clean, decimal-friendly figure that fits naturally within the broader metric system's logic, in contrast to the acre's more historically-derived and less mathematically tidy definition.
Square meters, the base metric area unit, tend to dominate official property documentation in many countries specifically for smaller residential and commercial parcels, where the resulting numbers stay in a reasonably intuitive range — a typical house plot expressed in hectares would be an awkwardly small decimal fraction, whereas the same plot in square meters gives a number that's immediately meaningful without further mental conversion.
This is exactly why being able to see a land area instantly converted across all four common units matters practically: someone reviewing an international property listing, comparing agricultural land parcels described in different countries' standard units, or simply cross-checking a legal document that uses one unit against a mental sense built around a different unit, benefits from an instant, error-free conversion rather than needing to look up conversion factors and calculate manually, a process where a misplaced decimal point can create a costly misunderstanding about a property's actual size.
Try breaking the irregular shape into simpler shapes (like a rectangle plus a triangle), calculate each separately, and add the results together.
A hectare (10,000 m²) is a metric unit, while an acre (about 4,046.86 m²) is an imperial/US customary unit — a hectare is roughly 2.47 acres.
This tool provides a mathematical estimate for planning purposes. For legal boundaries, deeds, or official surveys, always use a licensed land surveyor's measurements.