km² to mm²
39 unitsResult1.000000e+12
1.000000e+12mm²
1 km² × 1.000000e+12 = 1.000000e+12 mm²
Convert Square kilometer to Square millimeter (km² to mm²)
1 square kilometer = 1.000000e+12 square millimeters. Convert square kilometers to square millimeters instantly, with the exact factor, the formula and a reference table of common values.
Formula
square millimeters = square kilometers × 1.000000e+12
km² to mm² conversion table
| km² | mm² |
|---|---|
| 1 km² | 1.000000e+12 mm² |
| 2 km² | 2.000000e+12 mm² |
| 3 km² | 3.000000e+12 mm² |
| 5 km² | 5.000000e+12 mm² |
| 10 km² | 1.000000e+13 mm² |
| 20 km² | 2.000000e+13 mm² |
| 50 km² | 5.000000e+13 mm² |
| 100 km² | 1.000000e+14 mm² |
| 250 km² | 2.500000e+14 mm² |
| 500 km² | 5.000000e+14 mm² |
| 1000 km² | 1.000000e+15 mm² |
What is a square kilometer?
A square kilometer is a square one kilometer on each side: one million square meters. It is the unit used for cities, forests, lakes and countries.
For a feel of scale, Central Park in New York covers about 3.4 square kilometers, and a small town might spread over ten or twenty. One square kilometer is exactly 100 hectares.
In writing, the square kilometer is usually shortened to "km²". One square kilometer is 1000000 square meters, and that ratio is what every number on this page is built from.