Area Converter
Instantly convert between area units such as square meters (m²), square kilometers (km²), acres, hectares, and square miles (mi²) with our online free Area Converter.
Result
km²
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Conversion Formula
1 m² 1.000000 m² ÷ 1e6 → 0.000001 km²
About Area
Area is the size of a surface. It is commonly used in measuring land, rooms, plots, and generic two-dimensional space.
- Square meter (m²) – The standard unit of measurement of area in the SI (International System).
- Square kilometer (km²) – Oftentimes used in measuring land or territories; 1 km² is equivalent to 1,000,000 m².
- Hectare (ha) – Used in agriculture and land planning; 1 ha = 10,000 m².
- Acre (ac) – Imperial unit for land area; 1 ac ≈ 4046.86 m².
- Square mile (mi²) – Used in the United States for big land measurements.
- Square foot (ft²) – Often used in real estate listings.
- Barn (b) – Used in nuclear physics; 1 b = 1e-28 m².
- Square inch (in²) – Handy for small surface measurement.
- Square centimeter (cm²), decimeter (dm²), millimeter (mm²) – Metric submultiples.
- Micrometer² (μm²), Nanometer² (nm²) – For microscopic and nanoscale surfaces.
Area Units
Area units are used to measure the surface of two-dimensional space, and they vary widely based on the measuring system—whether it's metric or imperial. The most commonly used unit is the square meter (m²), and it is the preferred SI unit for area.
In the metric system, the square kilometer (km²) is some of the most frequently encountered units in measuring big land surface areas, and the square centimeter (cm²) or square millimeter (mm²) for small ones. There are other metric units like the square decimeter (dm²), the square dekameter (dam²), and the square hectometer (hm²) that are less commonly used but are part of the same system. Hectare (ha) and are (a) are used as common units for farm land.
In scientific fields, especially nuclear physics, the barn (b) is a unit of measurement kept for just describing the cross-sectional area of nuclei.
Square nanometer (nm²) and square micrometer (μm²) are used in extremely small measurements, which are usually for materials science and nanotechnology.
Area in the US customary and imperial systems is usually measured in square inch (in²), square foot (ft²), and square yard (yd²). The larger units, especially for grounds, are acre (ac) and square mile (mi²).
Every unit has a specific application depending on the field—science, engineering, real estate, or agriculture—thus the learning of area units is a necessity in different fields.