acres to square kilometers converter

1 acre equals 0.0040468564 square kilometers. Conversions use km² = acre × 0.004047

acre → 0.0040468564 km²

km² = acre × 0.004047

Converter

Worked examples

1 acre = 0.0040468564 km²
2 acre = 0.0080937128 km²
5 acre = 0.02023428 km²
10 acre = 0.04046856 km²
100 acre = 0.40468564 km²

acres to square kilometers conversion table

acre	km²	Arithmetic
1 acre	0.0040468564 km²	× 0.004047
2 acre	0.0080937128 km²	× 0.004047
3 acre	0.01214057 km²	× 0.004047
4 acre	0.01618743 km²	× 0.004047
5 acre	0.02023428 km²	× 0.004047
6 acre	0.02428114 km²	× 0.004047
8 acre	0.03237485 km²	× 0.004047
10 acre	0.04046856 km²	× 0.004047
12 acre	0.04856228 km²	× 0.004047
15 acre	0.06070285 km²	× 0.004047
20 acre	0.08093713 km²	× 0.004047
25 acre	0.10117141 km²	× 0.004047
30 acre	0.12140569 km²	× 0.004047
40 acre	0.16187426 km²	× 0.004047
50 acre	0.20234282 km²	× 0.004047
60 acre	0.24281139 km²	× 0.004047
70 acre	0.28327995 km²	× 0.004047
80 acre	0.32374851 km²	× 0.004047
90 acre	0.36421708 km²	× 0.004047
100 acre	0.40468564 km²	× 0.004047

How to convert acre to km²

Take your value in acres.
Multiply by 0.004047
That is your answer in square kilometers — no rounding needed until you choose a display precision.

Related conversions

km² to acre m² to km² km² to m² km² to sq ft km² to sq yd km² to ha sq ft to km² sq yd to km² acre to m² all area units

Questions

How many square kilometers in 1 acre?

Exactly 0.0040468564 km². The factor follows from the definitions of both units, not from a measurement, so it is exact.

How do I convert acre to km²?

Multiply the acres figure by 0.004047 — or use the converter above, which updates as you type.

Is acre to km² the same as km² to acre?

No — they are inverses. One acre is 0.0040468564 km², while one km² is 247.105 acre.

What is 1 acre in km²?

1 acre = 0.0040468564 km² (see the value page for the full arithmetic).