A square kilometer (symbol: sq km or km2) is equal to one million square meters. One square kilometer is approximately 0.39 square miles. Large areas of land are expressed in square kilometer -- for example area of a city or a forest.
The square millimeter (symbol: sq mm or mm2) is a unit of area in the metric system. Meter is the SI base unit of length. There are one thousand millimeters in a meter. There are ten millimeters in a centimeter.
One millimeter is equal to 1000 micrometers or 1000000 nanometers.
| square kilometer (km2) | square millimeter (mm2) |
|---|---|
| 1 square kilometer | 1000000000000 square millimeters |
| 2 square kilometers | 2000000000000 square millimeters |
| 3 square kilometers | 3000000000000 square millimeters |
| 4 square kilometers | 4000000000000 square millimeters |
| 5 square kilometers | 5000000000000 square millimeters |
| 6 square kilometers | 6000000000000 square millimeters |
| 7 square kilometers | 7000000000000 square millimeters |
| 8 square kilometers | 8000000000000 square millimeters |
| 9 square kilometers | 9000000000000 square millimeters |
| 10 square kilometers | 10000000000000 square millimeters |
| 11 square kilometers | 11000000000000 square millimeters |
| 12 square kilometers | 12000000000000 square millimeters |
| 13 square kilometers | 13000000000000 square millimeters |
| 14 square kilometers | 14000000000000 square millimeters |
| 15 square kilometers | 15000000000000 square millimeters |
| 16 square kilometers | 16000000000000 square millimeters |
| 17 square kilometers | 17000000000000 square millimeters |
| 18 square kilometers | 18000000000000 square millimeters |
| 19 square kilometers | 19000000000000 square millimeters |
| 20 square kilometers | 20000000000000 square millimeters |
| 21 square kilometers | 21000000000000 square millimeters |
| 22 square kilometers | 22000000000000 square millimeters |
| 23 square kilometers | 23000000000000 square millimeters |
| 24 square kilometers | 24000000000000 square millimeters |
| 25 square kilometers | 25000000000000 square millimeters |
| 26 square kilometers | 26000000000000 square millimeters |
| 27 square kilometers | 27000000000000 square millimeters |
| 28 square kilometers | 28000000000000 square millimeters |
| 29 square kilometers | 29000000000000 square millimeters |
| 30 square kilometers | 30000000000000 square millimeters |
| 31 square kilometers | 31000000000000 square millimeters |
| 32 square kilometers | 32000000000000 square millimeters |
| 33 square kilometers | 33000000000000 square millimeters |
| 34 square kilometers | 34000000000000 square millimeters |
| 35 square kilometers | 35000000000000 square millimeters |
| 36 square kilometers | 36000000000000 square millimeters |
| 37 square kilometers | 37000000000000 square millimeters |
| 38 square kilometers | 38000000000000 square millimeters |
| 39 square kilometers | 39000000000000 square millimeters |
| 40 square kilometers | 40000000000000 square millimeters |
| 41 square kilometers | 41000000000000 square millimeters |
| 42 square kilometers | 42000000000000 square millimeters |
| 43 square kilometers | 43000000000000 square millimeters |
| 44 square kilometers | 44000000000000 square millimeters |
| 45 square kilometers | 45000000000000 square millimeters |
| 46 square kilometers | 46000000000000 square millimeters |
| 47 square kilometers | 47000000000000 square millimeters |
| 48 square kilometers | 48000000000000 square millimeters |
| 49 square kilometers | 49000000000000 square millimeters |
| 50 square kilometers | 50000000000000 square millimeters |
| 51 square kilometers | 51000000000000 square millimeters |
| 52 square kilometers | 52000000000000 square millimeters |
| 53 square kilometers | 53000000000000 square millimeters |
| 54 square kilometers | 54000000000000 square millimeters |
| 55 square kilometers | 55000000000000 square millimeters |
| 56 square kilometers | 56000000000000 square millimeters |
| 57 square kilometers | 57000000000000 square millimeters |
| 58 square kilometers | 58000000000000 square millimeters |
| 59 square kilometers | 59000000000000 square millimeters |
| 60 square kilometers | 60000000000000 square millimeters |
| 61 square kilometers | 61000000000000 square millimeters |
| 62 square kilometers | 62000000000000 square millimeters |
| 63 square kilometers | 63000000000000 square millimeters |
| 64 square kilometers | 64000000000000 square millimeters |
| 65 square kilometers | 65000000000000 square millimeters |
| 66 square kilometers | 66000000000000 square millimeters |
| 67 square kilometers | 67000000000000 square millimeters |
| 68 square kilometers | 68000000000000 square millimeters |
| 69 square kilometers | 69000000000000 square millimeters |
| 70 square kilometers | 70000000000000 square millimeters |
| 71 square kilometers | 71000000000000 square millimeters |
| 72 square kilometers | 72000000000000 square millimeters |
| 73 square kilometers | 73000000000000 square millimeters |
| 74 square kilometers | 74000000000000 square millimeters |
| 75 square kilometers | 75000000000000 square millimeters |
| 76 square kilometers | 76000000000000 square millimeters |
| 77 square kilometers | 77000000000000 square millimeters |
| 78 square kilometers | 78000000000000 square millimeters |
| 79 square kilometers | 79000000000000 square millimeters |
| 80 square kilometers | 80000000000000 square millimeters |
| 81 square kilometers | 81000000000000 square millimeters |
| 82 square kilometers | 82000000000000 square millimeters |
| 83 square kilometers | 83000000000000 square millimeters |
| 84 square kilometers | 84000000000000 square millimeters |
| 85 square kilometers | 85000000000000 square millimeters |
| 86 square kilometers | 86000000000000 square millimeters |
| 87 square kilometers | 87000000000000 square millimeters |
| 88 square kilometers | 88000000000000 square millimeters |
| 89 square kilometers | 89000000000000 square millimeters |
| 90 square kilometers | 90000000000000 square millimeters |
| 91 square kilometers | 91000000000000 square millimeters |
| 92 square kilometers | 92000000000000 square millimeters |
| 93 square kilometers | 93000000000000 square millimeters |
| 94 square kilometers | 94000000000000 square millimeters |
| 95 square kilometers | 95000000000000 square millimeters |
| 96 square kilometers | 96000000000000 square millimeters |
| 97 square kilometers | 97000000000000 square millimeters |
| 98 square kilometers | 98000000000000 square millimeters |
| 99 square kilometers | 99000000000000 square millimeters |
| 100 square kilometers | 1.0E+14 square millimeters |
| 150 square kilometers | 1.5E+14 square millimeters |
| 200 square kilometers | 2.0E+14 square millimeters |
| 250 square kilometers | 2.5E+14 square millimeters |
| 300 square kilometers | 3.0E+14 square millimeters |
| 350 square kilometers | 3.5E+14 square millimeters |
| 400 square kilometers | 4.0E+14 square millimeters |
| 450 square kilometers | 4.5E+14 square millimeters |
| 500 square kilometers | 5.0E+14 square millimeters |
| 550 square kilometers | 5.5E+14 square millimeters |
| 600 square kilometers | 6.0E+14 square millimeters |
| 650 square kilometers | 6.5E+14 square millimeters |
| 700 square kilometers | 7.0E+14 square millimeters |
| 750 square kilometers | 7.5E+14 square millimeters |
| 800 square kilometers | 8.0E+14 square millimeters |
| 850 square kilometers | 8.5E+14 square millimeters |
| 900 square kilometers | 9.0E+14 square millimeters |
| 950 square kilometers | 9.5E+14 square millimeters |
| 1000 square kilometers | 1.0E+15 square millimeters |
| 1500 square kilometers | 1.5E+15 square millimeters |
| 2000 square kilometers | 2.0E+15 square millimeters |
| 2500 square kilometers | 2.5E+15 square millimeters |
| 3000 square kilometers | 3.0E+15 square millimeters |
| 3500 square kilometers | 3.5E+15 square millimeters |
| 4000 square kilometers | 4.0E+15 square millimeters |
| 4500 square kilometers | 4.5E+15 square millimeters |
| 5000 square kilometers | 5.0E+15 square millimeters |
| 5500 square kilometers | 5.5E+15 square millimeters |
| 6000 square kilometers | 6.0E+15 square millimeters |
| 6500 square kilometers | 6.5E+15 square millimeters |
| 7000 square kilometers | 7.0E+15 square millimeters |
| 7500 square kilometers | 7.5E+15 square millimeters |
| 8000 square kilometers | 8.0E+15 square millimeters |
| 8500 square kilometers | 8.5E+15 square millimeters |
| 9000 square kilometers | 9.0E+15 square millimeters |
| 9500 square kilometers | 9.5E+15 square millimeters |
| 10000 square kilometers | 1.0E+16 square millimeters |
| 15000 square kilometers | 1.5E+16 square millimeters |
| 20000 square kilometers | 2.0E+16 square millimeters |
| 25000 square kilometers | 2.5E+16 square millimeters |
| 30000 square kilometers | 3.0E+16 square millimeters |
| 35000 square kilometers | 3.5E+16 square millimeters |
| 40000 square kilometers | 4.0E+16 square millimeters |
| 45000 square kilometers | 4.5E+16 square millimeters |
| 50000 square kilometers | 5.0E+16 square millimeters |
| 55000 square kilometers | 5.5E+16 square millimeters |
| 60000 square kilometers | 6.0E+16 square millimeters |
| 65000 square kilometers | 6.5E+16 square millimeters |
| 70000 square kilometers | 7.0E+16 square millimeters |
| 75000 square kilometers | 7.5E+16 square millimeters |
| 80000 square kilometers | 8.0E+16 square millimeters |
| 85000 square kilometers | 8.5E+16 square millimeters |
| 90000 square kilometers | 9.0E+16 square millimeters |
| 95000 square kilometers | 9.5E+16 square millimeters |
| 100000 square kilometers | 1.0E+17 square millimeters |