Convert square kilometer (km²) to acre (acre).
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Acre to Square Kilometer Converter (acre to sq km)
Convert acre (acre) to square kilometer (km²).Unit Converter · Area
Quick answer
1 acre is approximately equal to 0.00404686 square kilometers (sq km). 1 square kilometer (sq km) is approximately equal to 247.1054 acres (acre).
To convert acre to sq km, multiply the value in acres by 0.0040468564. For example, 10 acre = 0.04046856 sq km, and 100 acre = 0.40468564 sq km.
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Quick reference — acre to square kilometer
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How to convert acres to square kilometers
How many square kilometers are in an acre? 1 acre is about 0.00404686 square kilometers. This free acre to km² converter and acre to square kilometer calculator gives the answer instantly for any value, and the same conversion is also written as acre to square kilometre and acre to sq km.
To convert acre (acre) to square kilometer (km²), multiply the value in acres by 0.0040468564.
km² = acre × 0.0040468564
- 1
Take the value in acres
For example, 25 acre.
- 2
Multiply by 0.0040468564
25 × 0.0040468564.
- 3
Read the answer in square kilometers
25 acre = 0.10117141 km².
Acre to Square Kilometer conversion table
Common values from 1 to 1,000 acres converted to square kilometers.
| Acre (acre) | Square Kilometer (km²) |
|---|---|
| 1 acre | 0.00404686 km² |
| 2 acre | 0.00809371 km² |
| 3 acre | 0.01214057 km² |
| 4 acre | 0.01618743 km² |
| 5 acre | 0.02023428 km² |
| 6 acre | 0.02428114 km² |
| 7 acre | 0.02832799 km² |
| 8 acre | 0.03237485 km² |
| 9 acre | 0.03642171 km² |
| 10 acre | 0.04046856 km² |
| 15 acre | 0.06070285 km² |
| 20 acre | 0.08093713 km² |
| 25 acre | 0.10117141 km² |
| Acre (acre) | Square Kilometer (km²) |
|---|---|
| 30 acre | 0.12140569 km² |
| 40 acre | 0.16187426 km² |
| 50 acre | 0.20234282 km² |
| 60 acre | 0.24281139 km² |
| 70 acre | 0.28327995 km² |
| 75 acre | 0.30351423 km² |
| 80 acre | 0.32374851 km² |
| 90 acre | 0.36421708 km² |
| 100 acre | 0.40468564 km² |
| 250 acre | 1.01171411 km² |
| 500 acre | 2.02342821 km² |
| 1,000 acre | 4.04685642 km² |
About acres and square kilometers
Acre (acre)
An acre is about 4,046.86 square meters, or 43,560 square feet. It is widely used for farmland and large plots in India, the US and UK.
Square Kilometer (km²)
A square kilometer (km²) is 1,000,000 square meters, or 100 hectares. It is used for the area of cities, districts and countries.
acre to km²: common questions
- How many square kilometers are in 1 acre?
- 1 acre is approximately equal to 0.00404686 square kilometers (sq km). In short: 1 acre ≈ 0.00404686 sq km.
- How do I convert acres to square kilometers?
- To convert acre to km², multiply the value in acres by 0.0040468564. For example, 5 acre = 0.02023428 km².
- How do I convert square kilometers to acres?
- Use the Square Kilometer to Acre converter, which applies the exact reverse factor.
- What is 10 acre in km², and what is 100 acre?
- 10 acre = 0.04046856 km², and 100 acre = 0.40468564 km². The table above lists more values from 1 to 1,000.
- Is this acre to km² converter accurate?
- Yes. It uses the exact conversion factor and shows results to as many as 8 decimal places, so you can rely on it for study, work and everyday measuring.
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