Square kilometers to square miles
square miles = square kilometers × 0.38610216
Reverse: square miles to square kilometers
How to convert square kilometers to square miles
One square kilometer is 0.38610216 square miles, so multiply the number of square kilometers by 0.38610216. For example, 20 square kilometers is 20 × 0.38610216 = 7.722043 square miles. To go back, divide by the same number, or multiply by 2.589988.
Quick estimate
Multiplying by about 0.4 gets within 3.6% 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 kilometers | square miles |
|---|---|
| 1 km2 | 0.38610216 mi2 |
| 2 km2 | 0.77220432 mi2 |
| 3 km2 | 1.158306 mi2 |
| 4 km2 | 1.544409 mi2 |
| 5 km2 | 1.930511 mi2 |
| 6 km2 | 2.316613 mi2 |
| 7 km2 | 2.702715 mi2 |
| 8 km2 | 3.088817 mi2 |
| 9 km2 | 3.474919 mi2 |
| 10 km2 | 3.861022 mi2 |
| 11 km2 | 4.247124 mi2 |
| 12 km2 | 4.633226 mi2 |
| 13 km2 | 5.019328 mi2 |
| 14 km2 | 5.40543 mi2 |
| 15 km2 | 5.791532 mi2 |
| 16 km2 | 6.177635 mi2 |
| 17 km2 | 6.563737 mi2 |
| 18 km2 | 6.949839 mi2 |
| 19 km2 | 7.335941 mi2 |
| 20 km2 | 7.722043 mi2 |
| 25 km2 | 9.652554 mi2 |
| 30 km2 | 11.583065 mi2 |
| 40 km2 | 15.444086 mi2 |
| 50 km2 | 19.305108 mi2 |
| 60 km2 | 23.16613 mi2 |
| 70 km2 | 27.027151 mi2 |
| 75 km2 | 28.957662 mi2 |
| 80 km2 | 30.888173 mi2 |
| 90 km2 | 34.749194 mi2 |
| 100 km2 | 38.610216 mi2 |
| 120 km2 | 46.332259 mi2 |
| 150 km2 | 57.915324 mi2 |
| 200 km2 | 77.220432 mi2 |
| 250 km2 | 96.52554 mi2 |
| 300 km2 | 115.830648 mi2 |
| 400 km2 | 154.440863 mi2 |
| 500 km2 | 193.051079 mi2 |
| 750 km2 | 289.576619 mi2 |
| 1,000 km2 | 386.102159 mi2 |
| 1,500 km2 | 579.153238 mi2 |
| 2,000 km2 | 772.204317 mi2 |
| 5,000 km2 | 1,930.51 mi2 |
| 10,000 km2 | 3,861.02 mi2 |
Questions
How many square miles are in a square kilometer?
0.38610216 square miles.
How do I convert square kilometers to square miles in a spreadsheet?
Put the value in A1 and type =A1*0.38610216, 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.