Table Of Contents
Acres to square kilometers Conversion
1 acres (acre) is equal to 0.004046856422 square kilometers (km²).
1 acre = 0.004046856422 km²
or
1 km² = 247.1053815 acre
Formula
To convert a area from acres (acre) to square kilometers (km²), divide the area in acres by 247.1053815
a(km²) = a(acre) / 247.1053815
Examples:
Convert 20 acres to square kilometers:
a(km²) = 20acre / 247.1053815 = 0.08093712845 km²
Conversion table
| Acres (acre) | Square kilometers (km²) |
|---|---|
| 1 acre | 0.004046856 km² |
| 2 acre | 0.008093713 km² |
| 3 acre | 0.012140569 km² |
| 5 acre | 0.020234282 km² |
| 10 acre | 0.040468564 km² |
| 20 acre | 0.080937128 km² |
| 25 acre | 0.101171411 km² |
| 50 acre | 0.202342821 km² |
| 100 acre | 0.404685642 km² |
| 250 acre | 1.011714106 km² |
| 500 acre | 2.023428211 km² |
| 1000 acre | 4.046856422 km² |
| Square kilometers (km²) | Acres (acre) |
|---|---|
| 1 km² | 247.105381467 acre |
| 2 km² | 494.210762934 acre |
| 3 km² | 741.316144401 acre |
| 5 km² | 1235.526907336 acre |
| 10 km² | 2471.053814672 acre |
| 20 km² | 4942.107629343 acre |
| 25 km² | 6177.634536679 acre |
| 50 km² | 12355.269073358 acre |
| 100 km² | 24710.538146717 acre |
| 250 km² | 61776.345366791 acre |
| 500 km² | 123552.690733583 acre |
| 1000 km² | 247105.381467165 acre |
Frequently asked questions
How do I convert acres to square kilometers?
Divide the value in acres by 247.1053815 to get the result in square kilometers. For example, 5 acre ÷ 247.1053815 = 0.020234282 km².
How many square kilometers are in 1 acres?
1 acres (acre) is equal to 0.004046856 square kilometers (km²).
How do I convert square kilometers back to acres?
Use the inverse operation: multiply the value in square kilometers by 247.1053815 to get the result in acres.
How accurate is the acres to square kilometers conversion?
The converter multiplies by the conversion factor 247.1053815 and rounds the result to 9 decimal places by default. You can increase or reduce the precision with the digits option on this page.
Sources
Conversion factors are based on internationally recognised standards:
- BIPM — The International System of Units (SI Brochure, 9th edition)
- NIST Handbook 44, Appendix C — General Tables of Units of Measurement (current edition)
- U.S. Survey Foot: Revised Unit Conversion Factors
- NIST Guide to the SI (SP 811), Appendix B.9: Factors for units listed by kind of quantity or field of science