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Acres to square kilometers

1 acre in square kilometers
1 acre = 0.0040469 km²
km² = acre × 0.004046856422

To convert acres to square kilometers, multiply by 0.004046856422. The table below gives the values people look up most often, and the converter works for any number.

Acres to square kilometers table

Common acre values converted to square kilometers.
Acres Square kilometers
1 acre 0.0040469
2 acre 0.0080937
3 acre 0.012141
4 acre 0.016187
5 acre 0.020234
10 acre 0.040469
15 acre 0.060703
20 acre 0.080937
25 acre 0.10117
30 acre 0.12141
40 acre 0.16187
50 acre 0.20234
75 acre 0.30351
100 acre 0.40469
250 acre 1.011714
500 acre 2.023428
1,000 acre 4.046856

How the conversion works

The relationship is km² = acre × 0.004046856422. Both units measure area, so the conversion is a fixed factor that never changes.

Common questions

How many square kilometers are in one acre?
One acre equals 0.0040469 square kilometers. km² = acre × 0.004046856422.
How do you convert acres to square kilometers?
Use km² = acre × 0.004046856422. So 10 acre is 0.040469 km².
How many acres are in one square kilometer?
One square kilometer equals 247.1054 acres, which is the reverse of the conversion above.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked