Area Converter

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

Area
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Related Conversions
1 km² to acre 5 km² to acre 10 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
Reverse Conversions
1 acre to km² 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
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 km² to mi² 2 mi² to km² 5,000 ft² to m² 2,500 m² to ft²

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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
Basketball court 420 m2
House floor area 150 m2
Acre 4047 m2
King-size bed footprint 3.7 m2
Tennis court doubles 261 m2

Formula

acre = km² × 247.1053814672

Example

Example: convert 20 square kilometers to acres.

20 km² = 4942.10762934 acre

Conversion table

square kilometers (km²) acres (acre)
1 km² 247.10538147 acre
2 km² 494.21076293 acre
5 km² 1235.52690734 acre
10 km² 2471.05381467 acre
20 km² 4942.10762934 acre
50 km² 12355.26907336 acre
100 km² 24710.53814672 acre

Explanation

These are both units.

How to convert square kilometers to acres

  1. Start with the value in square kilometers (km²).
  2. Multiply it by 247.1053814672.
  3. The result is the measurement in acres (acre).

Example: 20 km² → 4942.10762934 acre

Frequently Asked Questions

How much is 20 square kilometers in acres?

20 square kilometers is about 4942.11 acres.

How many acres is 1 square kilometer?

1 square kilometer equals 247.10538147 acres.

How many square kilometers is 1 acre?

1 acre equals 0.004046856422 square kilometers.

What is the difference between square kilometers and acres?

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

Where are square kilometers and acres 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 square kilometer equal 247.10538147 acres?

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