Convert Acres to Square Kilometers

Enter your acre value in the form below to get the value calculated in square kilometers.

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Results in Square Kilometers:
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1 ac = 0.004047 sq km

How to Convert Acres to Square Kilometers Using an Easy Conversion Formula

Calculators can be used to convert measurements from one unit to another

Convert acres to square kilometers with this simple formula:

square kilometers = acres × 0.004047

Converting an acre area measurement to a square kilometer measurement involves multiplying your area by the conversion ratio to find the result. An acre is equal to 0.004047 square kilometers, so to convert simply multiply by 0.004047.

For example:
5 ac = (5 × 0.004047) = 0.020234 sq km

Use an acreage calculator to find the area of a plot of land in acres by locating the boundaries on a map.

Acres and square kilometers are both units used to measure area. Learn more about area and find more area measurement conversion calculators. An acre is an imperial measurement and can be abbreviated as ac, for example 1 ac. A square kilometer is a metric measurement and can be abbreviated as sq km, for example 1 sq km. Learn more about the metric system, including the common unit prefixes and how to convert between metric units.

acres and square kilometers are units used to measure area
Convert Square Kilometers to Acres

Acre Measurements and Equivalent Square Kilometer Conversions

Common acre values converted to the equivalent square kilometer value
Acres Square Kilometers
1 ac 0.004047 sq km
2 ac 0.008094 sq km
3 ac 0.012141 sq km
4 ac 0.016187 sq km
5 ac 0.020234 sq km
6 ac 0.024281 sq km
7 ac 0.028328 sq km
8 ac 0.032375 sq km
9 ac 0.036422 sq km
10 ac 0.040469 sq km
11 ac 0.044515 sq km
12 ac 0.048562 sq km
13 ac 0.052609 sq km
14 ac 0.056656 sq km
15 ac 0.060703 sq km
16 ac 0.06475 sq km
17 ac 0.068797 sq km
18 ac 0.072843 sq km
19 ac 0.07689 sq km
20 ac 0.080937 sq km
21 ac 0.084984 sq km
22 ac 0.089031 sq km
23 ac 0.093078 sq km
24 ac 0.097125 sq km
25 ac 0.101171 sq km
26 ac 0.105218 sq km
27 ac 0.109265 sq km
28 ac 0.113312 sq km
29 ac 0.117359 sq km
30 ac 0.121406 sq km
31 ac 0.125453 sq km
32 ac 0.129499 sq km
33 ac 0.133546 sq km
34 ac 0.137593 sq km
35 ac 0.14164 sq km
36 ac 0.145687 sq km
37 ac 0.149734 sq km
38 ac 0.153781 sq km
39 ac 0.157827 sq km
40 ac 0.161874 sq km

More Area Conversions

Convert to Square Miles Area
1 ac is equal to 0.001563 square miles
Convert to Square Yards Area
1 ac is equal to 4,840 square yards
Convert to Square Feet Area
1 ac is equal to 43,560 square feet
Convert to Square Inches Area
1 ac is equal to 6,272,640 square inches
Convert to Hectares Area
1 ac is equal to 0.404686 hectares
Convert to Ares Area
1 ac is equal to 40.468564 ares
Convert to Square Meters Area
1 ac is equal to 4,046.86 square meters
Convert to Square Centimeters Area
1 ac is equal to 40,468,564.2 square centimeters
Convert to Square Millimeters Area
1 ac is equal to 4,046,856,422.4 square millimeters