How do I convert square kilometers to acres?

Multiply the square kilometer value by 247.105. So x km² × 247.105 = the equivalent in ac.

What is 5 square kilometers in acres?

5 square kilometers equals 1235.53 acres.

What is 10 square kilometers in acres?

10 square kilometers equals 2471.05 acres.

What is 100 square kilometers in acres?

100 square kilometers equals 24710.5 acres.

How do I convert back from acres to square kilometers?

Multiply the acre value by 0.00404686. For example, 1 ac = 0.00404686 km².

Is the square kilometer bigger than the acre?

Yes. 1 square kilometer is larger than 1 acre — specifically 247.105 times larger.

Are these conversion factors exact?

Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (247.105) is exact within IEEE 754 double precision.

Square kilometers to Acres Converter

1 km² = 247.105 ac (square kilometer → acre)

1 km² = 247.105 ac

1 square kilometer equals 247.105 acres. To convert square kilometers to acres, multiply the square kilometer value by 247.105. For quick reference: 1 km² = 247.105 ac, 5 km² = 1235.53 ac, 10 km² = 2471.05 ac, 100 km² = 24710.5 ac.

From

247.105

FormulaAcres = Square kilometers × 247.105

Quick

When to use square kilometers → acres

Square kilometers to acres multiplies by 247.105. A 3 km² development zone is 741 acres. Useful in the same cross-border land contexts as its inverse — and as a scale anchor: one km² is roughly the area of 187 American football fields, or a square about 12.5 city blocks on a side. Round to whole acres; the precision of the source km² figure rarely justifies more.

How to convert square kilometers to acres

Take your value
Start with your value in square kilometers.
Multiply by 247.105
Multiply the square kilometer value by 247.105. This is the exact conversion factor from square kilometers to acres.
Read the result
The product is your value in acres. For example, 5 km² × 247.105 = 1235.53 ac.

Conversion formula

The exact factor from square kilometers to acres is 247.105.

Acres = Square kilometers × 247.105

Square kilometers to Acres conversion table

Fifty common reference values, hand-picked for skim utility. Use the calculator above for any value not listed.

Conversion table from square kilometers to acres
Square kilometers (km²)	Acres (ac)
0.1 km²	24.711 ac
0.25 km²	61.776 ac
0.5 km²	123.55 ac
1 km²	247.11 ac
2 km²	494.21 ac
3 km²	741.32 ac
4 km²	988.42 ac
5 km²	1235.5 ac
6 km²	1482.6 ac
7 km²	1729.7 ac
8 km²	1976.8 ac
9 km²	2223.9 ac
10 km²	2471.1 ac
12 km²	2965.3 ac
15 km²	3706.6 ac
20 km²	4942.1 ac
25 km²	6177.6 ac
30 km²	7413.2 ac
40 km²	9884.2 ac
50 km²	12355 ac
60 km²	14826 ac
70 km²	17297 ac
75 km²	18533 ac
80 km²	19768 ac
90 km²	22239 ac
100 km²	24711 ac
120 km²	29653 ac
150 km²	37066 ac
200 km²	49421 ac
250 km²	61776 ac
300 km²	74132 ac
400 km²	98842 ac
500 km²	123553 ac
600 km²	148263 ac
750 km²	185329 ac
800 km²	197684 ac
1000 km²	247105 ac
1200 km²	296526 ac
1500 km²	370658 ac
2000 km²	494211 ac
2500 km²	617763 ac
3000 km²	741316 ac
4000 km²	988422 ac
5000 km²	1235527 ac
7500 km²	1853290 ac
10000 km²	2471054 ac
20000 km²	4942108 ac
50000 km²	12355269 ac
100000 km²	24710538 ac
1000000 km²	247105381 ac

Real-world reference

Manhattan is about 59 km². Lake Geneva is about 580 km². In acres, that gives you: 1 km² = 247.105 ac, 10 km² = 2471.05 ac, 100 km² = 24710.5 ac.

Frequently asked questions

How many acres are in 1 square kilometer?: 1 square kilometer equals 247.105 acres.
How do I convert square kilometers to acres?: Multiply the square kilometer value by 247.105. So x km² × 247.105 = the equivalent in ac.
What is 5 square kilometers in acres?: 5 square kilometers equals 1235.53 acres.
What is 10 square kilometers in acres?: 10 square kilometers equals 2471.05 acres.
What is 100 square kilometers in acres?: 100 square kilometers equals 24710.5 acres.
How do I convert back from acres to square kilometers?: Multiply the acre value by 0.00404686. For example, 1 ac = 0.00404686 km².
Is the square kilometer bigger than the acre?: Yes. 1 square kilometer is larger than 1 acre — specifically 247.105 times larger.
Are these conversion factors exact?: Yes. Since the 1959 international yard and pound agreement, imperial/US units are defined exactly in terms of metric units, so the factor used here (247.105) is exact within IEEE 754 double precision.

About the square kilometer and the acre

The square kilometer

The square kilometer equals one million square meters — the standard unit for city, region, and country areas in metric countries. Manhattan is about 59 km²; Istanbul is about 5,461 km²; Turkey is about 783,562 km². One km² equals exactly 100 hectares or about 0.386 square miles.

The acre

The acre is the traditional imperial unit for land, still the standard for US and UK property, farmland, and parkland. One acre is exactly 4,046.8564224 m² — historically the area a yoke of oxen could plough in a day, standardised as 1 chain by 1 furlong (66 × 660 feet, or 43,560 square feet). An American football field including end zones is about 1.32 acres.

Acres to Square kilometers

ac → km²

Square meters to Square feet

m² → ft²

Square meters to Acres

m² → ac

Square meters to Hectares

m² → ha

Square meters to Square kilometers

m² → km²

Square meters to Square miles

m² → mi²