Acres to Square Kilometers

Convert Acres to Square Kilometers. 1 ac equals 0.004047 km². Type a value on either side; the formula and tables below show how it works.

ac
km²
1 Acres equals
0.004047km²

Formula: km² = ac × 0.004047. Example: 5 ac = 0.020234 km².

1 Acres in every unit

Square Meters4,046.86 m²
Square Feet43,560 ft²
Square Yards4,840 yd²
Square Inches6,272,640 in²
Square Kilometers0.004047 km²
Square Miles0.001563 mi²
Hectares0.404686 ha

Acres to Square Kilometers table

AcresSquare Kilometers
0.1 ac0.000404686 km²
0.25 ac0.001012 km²
0.5 ac0.002023 km²
1 ac0.004047 km²
2 ac0.008094 km²
3 ac0.012141 km²
4 ac0.016187 km²
5 ac0.020234 km²
10 ac0.040469 km²
15 ac0.060703 km²
20 ac0.080937 km²
25 ac0.101171 km²
50 ac0.202343 km²
75 ac0.303514 km²
100 ac0.404686 km²
250 ac1.0117 km²
500 ac2.0234 km²
1,000 ac4.0469 km²
Square KilometersAcres
0.1 km²24.7105 ac
0.25 km²61.7763 ac
0.5 km²123.5527 ac
1 km²247.1054 ac
2 km²494.2108 ac
3 km²741.3161 ac
4 km²988.4215 ac
5 km²1,235.53 ac
10 km²2,471.05 ac
15 km²3,706.58 ac
20 km²4,942.11 ac
25 km²6,177.63 ac
50 km²12,355.27 ac
75 km²18,532.9 ac
100 km²24,710.54 ac
250 km²61,776.35 ac
500 km²123,552.69 ac
1,000 km²247,105.38 ac

How to convert acres to square kilometers

km² = ac × 0.004047

Multiply the value in acres by 0.004047. To go the other way, divide by the same number, or multiply by 247.1054. For example, 5 ac × 0.004047 = 0.020234 km².

About the units

Acres (ac). 43,560 square feet. Farmland and property lots in the US and UK.

Square Kilometers (km²). Cities, countries and lakes.

Other area conversions

Square Meters to Square Kilometers · Square Feet to Square Kilometers · Square Yards to Square Kilometers · Square Inches to Square Kilometers · Square Kilometers to Square Meters · Square Kilometers to Square Feet · Square Kilometers to Square Yards · Square Kilometers to Square Inches · Square Kilometers to Square Miles · Square Kilometers to Acres · Square Kilometers to Hectares · Square Miles to Square Kilometers · Acres to Square Meters · Acres to Square Feet · Acres to Square Yards · Acres to Square Inches · Acres to Square Kilometers · Acres to Square Miles · Acres to Hectares · Hectares to Square Kilometers

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