Acres to Square Kilometers: 1 ac equals 0.004047 km². To convert acres to square kilometers, multiply by 0.004047 (km² = ac × 0.00404686). For example, 10 ac = 0.040469 km².
How to Convert Acres to Square Kilometers
To convert from acres to square kilometers, multiply the value by 0.004047. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Acres to Square Kilometers:
km² = ac × 0.00404686 - Square Kilometers to Acres:
ac = km² ÷ 0.00404686
Acres to Square Kilometers Conversion Chart
| Acres (ac) | Square Kilometers (km²) |
|---|---|
| 0.1 | 0.000405 |
| 0.25 | 0.001012 |
| 0.5 | 0.002023 |
| 1 | 0.004047 |
| 2 | 0.008094 |
| 3 | 0.012141 |
| 5 | 0.020234 |
| 10 | 0.040469 |
| 20 | 0.080937 |
| 25 | 0.101171 |
| 50 | 0.202343 |
| 100 | 0.404686 |
| 250 | 1.011714 |
| 1000 | 4.046856 |
Understanding the Units
What is an Acre?
An acre equals exactly 4,046.8564224 square meters, or 43,560 square feet.
From Old English æcer ("field"), historically the area a yoke of oxen could plow in a day.