How do I convert Square kilometer (km²) to Acre?

1 km2 equals 247.105381 acre using SI-based conversion and precise factors.

What is the formula to convert Square kilometer (km²) to Acre?

This is a linear unit conversion using a constant factor between units.

Is Square kilometer (km²) to Acre conversion exact?

Yes, it uses exact definitions or standardized constants (e.g., 1 in = 25.4 mm).

How can I share a direct km2 to acre result?

Use the shareable URL: http://measurecalc.com/convert/square-kilometer-to-acre/1

Convert Square kilometer (km²) (km2) to Acre (acre)

Category: Area

Value From To Precision

247.105381 acre

1 km2 = 247.105381 acre

High-precision rounding: 6 decimals

How to convert square kilometer (km²) to acre

We convert by pivoting through the SI base unit for Area and applying exact factors where applicable.

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Examples

Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).

Common mistakes

Squaring a length conversion factor incorrectly or forgetting to square it.

About Area

Area equals length squared. It appears in real estate, land management, material takeoffs, and GIS. Square meters are SI standard; acres and hectares are common for land reporting in different regions.

About Square kilometer (km²)

Square kilometer (km²) is a commonly used unit within the Area category.

About Acre

Acre

Exactly 4,046.8564224 m². Traditional land area in US/UK real estate and agriculture.

History: Medieval origins as the area ploughable in a day; later standardized to a fixed metric value.

Related conversions from km2

km2 → ha Hectare (ha)
km2 → ft2 Square foot (ft²)
km2 → m2 Square meter (m²)
km2 → yd2 Square yard (yd²)

Related conversions to acre

ha → acre Hectare (ha)
ft2 → acre Square foot (ft²)
m2 → acre Square meter (m²)
yd2 → acre Square yard (yd²)