Area Converter

Convert among m², cm², mm², km², in², ft², yd², acres, hectares, and mi².

Area
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Related Conversions
5 acre to km² 10 acre to km² 20 acre to km² 50 acre to km² 100 acre to km² 200 acre to km² 500 acre to km² 1,000 acre to km² 2,500 acre to km² 5,000 acre to km² 10,000 acre to km²
Reverse Conversions
1 km² to acre 5 km² to acre 10 km² to acre 20 km² to acre 50 km² to acre 100 km² to acre 200 km² to acre 500 km² to acre 1,000 km² to acre 2,500 km² to acre 5,000 km² to acre 10,000 km² to acre
More Area Conversions
1 acre to ha 1 ha to acre 1 km² to mi² 1 mi² to km² 1 acre to ft² 1 ha to m² 1 acre to m² 10,000 m² to ha 2 mi² to km² 5,000 ft² to m² 1,000 m² to ft² 100 acre to m²

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Square Meters to Square Feet Square Feet to Square Meters Square Kilometers to Square Miles Square Miles to Square Kilometers Hectares to Acres Acres to Hectares

Common Benchmarks

Olympic pool surface 1250 m2
Baseball infield 3500 m2
King-size bed footprint 3.7 m2
Tennis court doubles 261 m2
Soccer field 7140 m2
Classroom 56 m2

Formula

km² = acre × 0.0040468564

Example

Example: convert 1 acre to square kilometers.

1 acre = 0.00404686 km²

Conversion table

acres (acre) square kilometers (km²)
1 acre 0.00404686 km²
2 acre 0.00809371 km²
5 acre 0.02023428 km²
10 acre 0.04046856 km²
20 acre 0.08093713 km²
50 acre 0.20234282 km²
100 acre 0.40468564 km²

Explanation

These are both units.

How to convert acres to square kilometers

  1. Start with the value in acres (acre).
  2. Multiply it by 0.0040468564.
  3. The result is the measurement in square kilometers (km²).

Example: 1 acre → 0.00404686 km²

Frequently Asked Questions

How many square kilometers is 1 acre?

1 acre is about 0.00404686 square kilometers.

How many acres is 1 square kilometer?

1 square kilometer equals 247.10538147 acres.

What is the difference between acres and square kilometers?

Both are units of area. The main difference is usually scale and common usage context.

Where are acres and square kilometers used?

They are used to measure area in everyday and technical contexts. The most common unit depends on the field and measurement needs.

Why does 1 acre equal 0.004046856422 square kilometers?

Because the units are defined with a fixed relationship. To convert acres to square kilometers, multiply by that factor.

How do you convert acres to square kilometers?

Multiply the value in acres by 0.004046856422 to get square kilometers.