Square hectometre (International spelling as used by the International Bureau of Weights and Measures) or Square hectometer (American spelling) or hectare, symbol hm2, is the unit of area or surface area.
| Definition | Relation to SI units |
|---|---|
≡ 1 hm × 1 hm ≡ 102 m × 102 m |
| millibarn | board | section | attobarn | hide | zeptobarn | square chain (international) | barn |
|---|---|---|---|---|---|---|---|
| 1 | 1.2916692500052 × 10-29 | 3.8610215854245 × 10-38 | 1.0 × 1015 | 2.0 × 10-37 | 1.0 × 1018 | 2.4710538146717 × 10-34 | 0.001 |
| 7.74192 × 1028 | 1 | 2.9891720232629 × 10-9 | 7.74192 × 1043 | 1.548384 × 10-8 | 7.74192 × 1046 | 1.9130700948883 × 10-5 | 7.74192 × 1025 |
| 2.589988110336 × 1037 | 334 540 800 | 1 | 2.589988110336 × 1052 | 5.1799762 | 2.589988110336 × 1055 | 6 400 | 2.589988110336 × 1034 |
| 1.0 × 10-15 | 1.2916692500052 × 10-44 | 3.8610215854245 × 10-53 | 1 | 2.0 × 10-52 | 1 000 | 2.4710538146717 × 10-49 | 1.0 × 10-18 |
| 5.0 × 1036 | 64,583,462.500258 | 0.1930511 | 5.0 × 1051 | 1 | 5.0 × 1054 | 1,235.5269073 | 5.0 × 1033 |
| 1.0 × 10-18 | 1.2916692500052 × 10-47 | 3.8610215854245 × 10-56 | 0.001 | 2.0 × 10-55 | 1 | 2.4710538146717 × 10-52 | 1.0 × 10-21 |
| 4.0468564224 × 1033 | 52 272 | 0.0001563 | 4.0468564224 × 1048 | 0.0008094 | 4.0468564224 × 1051 | 1 | 4.0468564224 × 1030 |
| 1 000 | 1.2916692500052 × 10-26 | 3.8610215854245 × 10-35 | 1.0 × 1018 | 2.0 × 10-34 | 1.0 × 1021 | 2.4710538146717 × 10-31 | 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 …) |
| 1 square hectometers | = 10000 square meters |
| 2 square hectometers | = 20000 square meters |
| 3 square hectometers | = 30000 square meters |
| 4 square hectometers | = 40000 square meters |
| 5 square hectometers | = 50000 square meters |