To help compare sizes of different geographic regions, areas between 10 hectares (100,000 m2) and 100 hectares (1,000,000 m2) are listed below.
- Areas smaller than 0.1 km2
- 0.1 km2 is equal to:
- 1 E+5 m² or 100,000 m2
- 10 hectares
- 25 acres
- 1.08 million square feet
- the area of a square with side of 316.2 m
- 12 hectares – Base area of The Pentagon, USA
- 13 hectares - Place des Quinconces, Bordeaux
- 16.1874257 hectares - 40 acres - 1/16 section (US Survey block)
- 18 hectares - Jethou
- 19 hectares - Irish National Botanic Gardens
- 19 hectares - Liancourt Rocks (total area, all islets)
- 25 hectares - Tuileries Garden
- 28 hectares - Ponte Tresa (smallest municipality of Switzerland)
- 34 hectares - Disneyland (public areas)
- 35 hectares - Palace of the Parliament, Bucharest (floorspace)
- 36 hectares - Ryugyong Hotel in Pyongyang, North Korea (floorspace of largest unoccupied building)
- 40 hectares - Macroplaza, Monterrey
- 44 hectares - Vatican City (country ranked 234th by area)
- 44 hectares - Tiananmen Square, Beijing
- 62 hectares - The Pentagon (gross floor area)
- 72 hectares - Forbidden City, Beijing
- 90 hectares - Garden of the Versailles Palace [1]
- 99 hectares - Aalsmeer Flower Auction in Aalsmeer, Holland (floorspace)
- Areas larger than 1 km2
| Orders of magnitude for area | ||||||||
|---|---|---|---|---|---|---|---|---|
| 1 E-30 m² = 1 fm² | 1 E-24 m² = 1 pm² | 1 E-18 m² = 1 nm² | 1 E-12 m² = 1 µm² | 1 E-6 m² = 1 mm² | 1 E0 m² = 1 m² | 1 E+6 m² = 1 km² | 1 E+12 m² = 1 Mm² | 1 E+18-24 m² : 1 Gm² |
| 10 fm² | 10 pm² | 10 nm² | 10 µm² | 10 mm² | 10 m² | 10 km² | 10 Mm² | > 1 E+24 m² : 1 Tm² |
| 100 fm² | 100 pm² | 100 nm² | 100 µm² | 100 mm² = 1 cm² | 100 m² = 1 a | 100 km² | 100 Mm² | |
| 1,000 fm² | 1,000 pm² | 1,000 nm² | 1,000 µm² | 10 cm² | 10 a | 1,000 km² | 1,000 Mm² | |
| 10,000 fm² | 10,000 pm² | 10,000 nm² | 10,000 µm² | 100 cm² | 10,000 m² = 1 ha | 10,000 km² | 10,000 Mm² | |
| 100,000 fm² | 100,000 pm² | 100,000 nm² | 100,000 µm² | 1,000 cm² | 10 ha | 100,000 km² | 100,000 Mm² | |
| SI derived unit square metre, from base unit metre | Conversion of units for area | |||||||
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