Square kilometres to Acres Converter
Convert square kilometres (km²) to acres (ac) instantly. Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Result
- Acres
- 247.1054 ac
How to use the square kilometres to acres converter
- Enter the square kilometres (km²).
- The results update as you type, or press Calculate.
- Read the acres first, then the supporting figures below it.
Formula
Acres = square kilometres × 247.1053814672
Worked example
For example, with these inputs:
- Square kilometres (km²): 1
the calculator returns:
- Acres: 247.1054 ac
Square kilometres to Acres table
| Square kilometres | Acres |
|---|---|
| 1 km² | 247.1054 ac |
| 2 km² | 494.2108 ac |
| 5 km² | 1,235.53 ac |
| 10 km² | 2,471.05 ac |
| 20 km² | 4,942.11 ac |
| 25 km² | 6,177.63 ac |
| 50 km² | 12,355.27 ac |
| 100 km² | 24,710.54 ac |
| 250 km² | 61,776.35 ac |
| 500 km² | 123,552.69 ac |
| 1,000 km² | 247,105.38 ac |
About this conversion
Area conversions are everyday maths in Singapore property: HDB flats are listed in square metres while condo listings and PSF prices use square feet.
Writing the units next to every number while you work is the simplest way to avoid mistakes. If the units do not cancel to leave the one you want, the calculation is set up wrongly.
Singapore adopted the metric system in the 1970s, replacing imperial units and traditional Chinese measures in most official uses. Metric units are now standard in schools, trade and government, but older units survive in property, markets and imported goods.
Frequently asked questions
How many acres are in one square kilometre?
1 km² = 247.1054 ac.
How do I convert km² to ac?
Acres = square kilometres × 247.1053814672.