Acres to square kilometres
1 ac = 0.0040468564 km²
All units in this category
- 4,046,856,400mm²
- 40,468,564cm²
- 4,046.8564m²
- 0.40468564ha
- 0.0040468564km²
- 43,560ft²
- 1ac
- 0.0015625mi²
Formula
Multiply the value in acres by 0.0040468564 to get square kilometres.
km² = ac × 0.0040468564
How to convert acres to square kilometres
Type a value in the field above and the result is calculated instantly. Use the arrow button to swap direction, or pick other units from the lists.
Acres to square kilometres – common values
| Acres (ac) | Square kilometres (km²) |
|---|---|
| 1 | 0.00404686 |
| 2 | 0.00809371 |
| 5 | 0.0202343 |
| 10 | 0.0404686 |
| 20 | 0.0809371 |
| 50 | 0.202343 |
| 100 | 0.404686 |
| 500 | 2.02343 |
| 1,000 | 4.04686 |
| 10,000 | 40.4686 |
About the units
Acres. An acre is about 0.4 hectares and is used in English-speaking countries.