Square feet to square kilometers
square kilometers = square feet × 9.290304e-8
Reverse: square kilometers to square feet
How to convert square feet to square kilometers
One square foot is 9.290304e-8 square kilometers, so multiply the number of square feet by 9.290304e-8. For example, 20 square feet is 20 × 9.290304e-8 = 0.00000186 square kilometers. To go back, divide by the same number, or multiply by 10,763,910.42.
Quick estimate
Multiplying by about 9e-8 gets within 3.1% of the exact answer, which is enough to check that a result makes sense.
Where it comes up
Area conversions come up when buying flooring, paint or turf, comparing house and flat sizes, and measuring land and gardens.
| square feet | square kilometers |
|---|---|
| 1 ft2 | 9.290304e-8 km2 |
| 2 ft2 | 1.858061e-7 km2 |
| 3 ft2 | 2.787091e-7 km2 |
| 4 ft2 | 3.716122e-7 km2 |
| 5 ft2 | 4.645152e-7 km2 |
| 6 ft2 | 5.574182e-7 km2 |
| 7 ft2 | 6.503213e-7 km2 |
| 8 ft2 | 7.432243e-7 km2 |
| 9 ft2 | 8.361274e-7 km2 |
| 10 ft2 | 9.290304e-7 km2 |
| 11 ft2 | 0.00000102 km2 |
| 12 ft2 | 0.00000111 km2 |
| 13 ft2 | 0.00000121 km2 |
| 14 ft2 | 0.0000013 km2 |
| 15 ft2 | 0.00000139 km2 |
| 16 ft2 | 0.00000149 km2 |
| 17 ft2 | 0.00000158 km2 |
| 18 ft2 | 0.00000167 km2 |
| 19 ft2 | 0.00000177 km2 |
| 20 ft2 | 0.00000186 km2 |
| 25 ft2 | 0.00000232 km2 |
| 30 ft2 | 0.00000279 km2 |
| 40 ft2 | 0.00000372 km2 |
| 50 ft2 | 0.00000465 km2 |
| 60 ft2 | 0.00000557 km2 |
| 70 ft2 | 0.0000065 km2 |
| 75 ft2 | 0.00000697 km2 |
| 80 ft2 | 0.00000743 km2 |
| 90 ft2 | 0.00000836 km2 |
| 100 ft2 | 0.00000929 km2 |
| 120 ft2 | 0.00001115 km2 |
| 150 ft2 | 0.00001394 km2 |
| 200 ft2 | 0.00001858 km2 |
| 250 ft2 | 0.00002323 km2 |
| 300 ft2 | 0.00002787 km2 |
| 400 ft2 | 0.00003716 km2 |
| 500 ft2 | 0.00004645 km2 |
| 750 ft2 | 0.00006968 km2 |
| 1,000 ft2 | 0.0000929 km2 |
| 1,500 ft2 | 0.00013935 km2 |
| 2,000 ft2 | 0.00018581 km2 |
| 5,000 ft2 | 0.00046452 km2 |
| 10,000 ft2 | 0.00092903 km2 |
Questions
How many square kilometers are in a square foot?
9.290304e-8 square kilometers.
How do I convert square feet to square kilometers in a spreadsheet?
Put the value in A1 and type =A1*9.290304e-8, then fill the formula down the column.
Are the values in the table exact?
They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.