| square kilometer | 1 km2 | 2 km2 | 3 km2 | 4 km2 | 5 km2 | 6 km2 | 7 km2 | 8 km2 | 9 km2 | 10 km2 | 11 km2 | 12 km2 | 13 km2 | 14 km2 | 15 km2 | 16 km2 | 17 km2 | 18 km2 | 19 km2 | 20 km2 | 21 km2 | 22 km2 | 23 km2 | 24 km2 | 25 km2 | 26 km2 | 27 km2 | 28 km2 | 29 km2 | 30 km2 | 31 km2 | 32 km2 | 33 km2 | 34 km2 | 35 km2 | 36 km2 | 37 km2 | 38 km2 | 39 km2 | 40 km2 | 41 km2 | 42 km2 | 43 km2 | 44 km2 | 45 km2 | 46 km2 | 47 km2 | 48 km2 | 49 km2 | 50 km2 | 51 km2 | 52 km2 | 53 km2 | 54 km2 | 55 km2 | 56 km2 | 57 km2 | 58 km2 | 59 km2 | 60 km2 | 61 km2 | 62 km2 | 63 km2 | 64 km2 | 65 km2 | 66 km2 | 67 km2 | 68 km2 | 69 km2 | 70 km2 | 71 km2 | 72 km2 | 73 km2 | 74 km2 | 75 km2 | 76 km2 | 77 km2 | 78 km2 | 79 km2 | 80 km2 | 81 km2 | 82 km2 | 83 km2 | 84 km2 | 85 km2 | 86 km2 | 87 km2 | 88 km2 | 89 km2 | 90 km2 | 91 km2 | 92 km2 | 93 km2 | 94 km2 | 95 km2 | 96 km2 | 97 km2 | 98 km2 | 99 km2 | 100 km2 |
| square gigameter | 1.0 × 10-12 Gm2 | 2.0 × 10-12 Gm2 | 3.0 × 10-12 Gm2 | 4.0 × 10-12 Gm2 | 5.0 × 10-12 Gm2 | 6.0 × 10-12 Gm2 | 7.0 × 10-12 Gm2 | 8.0 × 10-12 Gm2 | 9.0 × 10-12 Gm2 | 1.0 × 10-11 Gm2 | 1.1 × 10-11 Gm2 | 1.2 × 10-11 Gm2 | 1.3 × 10-11 Gm2 | 1.4 × 10-11 Gm2 | 1.5 × 10-11 Gm2 | 1.6 × 10-11 Gm2 | 1.7 × 10-11 Gm2 | 1.8 × 10-11 Gm2 | 1.9 × 10-11 Gm2 | 2.0 × 10-11 Gm2 | 2.1 × 10-11 Gm2 | 2.2 × 10-11 Gm2 | 2.3 × 10-11 Gm2 | 2.4 × 10-11 Gm2 | 2.5 × 10-11 Gm2 | 2.6 × 10-11 Gm2 | 2.7 × 10-11 Gm2 | 2.8 × 10-11 Gm2 | 2.9 × 10-11 Gm2 | 3.0 × 10-11 Gm2 | 3.1 × 10-11 Gm2 | 3.2 × 10-11 Gm2 | 3.3 × 10-11 Gm2 | 3.4 × 10-11 Gm2 | 3.5 × 10-11 Gm2 | 3.6 × 10-11 Gm2 | 3.7 × 10-11 Gm2 | 3.8 × 10-11 Gm2 | 3.9 × 10-11 Gm2 | 4.0 × 10-11 Gm2 | 4.1 × 10-11 Gm2 | 4.2 × 10-11 Gm2 | 4.3 × 10-11 Gm2 | 4.4 × 10-11 Gm2 | 4.5 × 10-11 Gm2 | 4.6 × 10-11 Gm2 | 4.7 × 10-11 Gm2 | 4.8 × 10-11 Gm2 | 4.9 × 10-11 Gm2 | 5.0 × 10-11 Gm2 | 5.1 × 10-11 Gm2 | 5.2 × 10-11 Gm2 | 5.3 × 10-11 Gm2 | 5.4 × 10-11 Gm2 | 5.5 × 10-11 Gm2 | 5.6 × 10-11 Gm2 | 5.7 × 10-11 Gm2 | 5.8 × 10-11 Gm2 | 5.9 × 10-11 Gm2 | 6.0 × 10-11 Gm2 | 6.1 × 10-11 Gm2 | 6.2 × 10-11 Gm2 | 6.3 × 10-11 Gm2 | 6.4 × 10-11 Gm2 | 6.5 × 10-11 Gm2 | 6.6 × 10-11 Gm2 | 6.7 × 10-11 Gm2 | 6.8 × 10-11 Gm2 | 6.9 × 10-11 Gm2 | 7.0 × 10-11 Gm2 | 7.1 × 10-11 Gm2 | 7.2 × 10-11 Gm2 | 7.3 × 10-11 Gm2 | 7.4 × 10-11 Gm2 | 7.5 × 10-11 Gm2 | 7.6 × 10-11 Gm2 | 7.7 × 10-11 Gm2 | 7.8 × 10-11 Gm2 | 7.9 × 10-11 Gm2 | 8.0 × 10-11 Gm2 | 8.1 × 10-11 Gm2 | 8.2 × 10-11 Gm2 | 8.3 × 10-11 Gm2 | 8.4 × 10-11 Gm2 | 8.5 × 10-11 Gm2 | 8.6 × 10-11 Gm2 | 8.7 × 10-11 Gm2 | 8.8 × 10-11 Gm2 | 8.9 × 10-11 Gm2 | 9.0 × 10-11 Gm2 | 9.1 × 10-11 Gm2 | 9.2 × 10-11 Gm2 | 9.3 × 10-11 Gm2 | 9.4 × 10-11 Gm2 | 9.5 × 10-11 Gm2 | 9.6 × 10-11 Gm2 | 9.7 × 10-11 Gm2 | 9.8 × 10-11 Gm2 | 9.9 × 10-11 Gm2 | 1.0 × 10-10 Gm2 |
Square kilometre (International spelling as used by the International Bureau of Weights and Measures) or square kilometer (American spelling), symbol km2, is a multiple of the square metre, the SI unit of area or surface area.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| square kilometer | km2 | ≡ 1 km × 1 km | = 106 m2 | Metric system SI |
| square kilometers | square gigameters | square kilometers | square gigameters |
|---|---|---|---|
| 1 | = 1.0E-12 | 6 | = 6.0E-12 |
| 2 | = 2.0E-12 | 7 | = 7.0E-12 |
| 3 | = 3.0E-12 | 8 | = 8.0E-12 |
| 4 | = 4.0E-12 | 9 | = 9.0E-12 |
| 5 | = 5.0E-12 | 10 | = 1.0E-11 |
Square gigametre or Square gigameter is a metric unit of area, symbol Gm2, is a multiple of the of SI prefixes (giga) used with the metre.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| square gigameter | Gm2 | ≡ 1 Gm × 1 Gm ≡ 109 m × 109 m | = 1018 m2 | Metric system SI |
| square gigameters | square kilometers | square gigameters | square kilometers |
|---|---|---|---|
| 1 | = 1000000000000 | 6 | = 6000000000000 |
| 2 | = 2000000000000 | 7 | = 7000000000000 |
| 3 | = 3000000000000 | 8 | = 8000000000000 |
| 4 | = 4000000000000 | 9 | = 9000000000000 |
| 5 | = 5000000000000 | 10 | = 10000000000000 |
| square kilometers | square gigameters |
|---|---|
| 1 | = 1.0 × 10-12 |
| 1 000 000 000 000 | = 1 |
| Symbol | Definition |
|---|---|
| ≡ | exactly equal |
| ≈ | approximately equal to |
| = | equal to |
| digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |