What is hectare?
A hectare is a metric unit of area equal to 10,000 square metres. It is the standard unit for measuring agricultural land, forest areas, and large parcels of real estate in metric countries.
Real-world uses
Hectares are the standard unit for agricultural land measurement, forestry management, and urban planning worldwide. Wine regions report vineyard sizes in hectares, and environmental reports quantify habitat loss in hectares. One hectare is roughly the size of two American football fields.
History
The hectare was introduced during the French Revolution as part of the metric system, originally called a "hecto-are" (100 ares). Though not an official SI unit, it is accepted for use with SI and remains the predominant land area unit in global agriculture.
Common mistakes
Confusing hectares with acres—1 hectare is about 2.47 acres, not 1-to-1. Also, some people confuse "hectare" with "hectometre," but a hectare is 10,000 m² (100 m × 100 m), a unit of area, not length.
What is square centimetre?
A square centimetre is a metric unit of area equal to one ten-thousandth of a square metre. It is used in textiles, printing, medical surface measurements, and small-scale technical applications.
Real-world uses
Square centimetres are used for cross-sectional areas of cables and pipes, skin wound sizes in medicine, and stamp collecting. PCB (printed circuit board) dimensions and bandage sizes are often specified in cm².
History
The square centimetre was the base area unit in the CGS system and was widely used in physics before SI standardization. It remains commonly used in everyday contexts where square metres are too large a unit for practical description.
Common mistakes
Confusing cm² with mm²—there are 100 mm² in 1 cm², not 10. This is a common error when converting between metric area units because area scales as the square of the linear conversion factor.
When is this conversion used?
Converting hectare to square centimetre is useful in the area domain when comparing values across different measurement standards or applying formulas that require a specific unit.
Worked examples
1 hectare = 100,000,000 square centimetre
1 square centimetre = 0.0001 square metre
How to convert hectare to square centimetre
To convert hectare to square centimetre, multiply the value by 100,000,000.
To convert square centimetre back to hectare, multiply by 1.000000e-08.
Measurement standards
The square metre is the SI derived unit of area. The hectare (10,000 m²) is accepted for use with the SI by the BIPM, particularly for land measurement, though it is not an SI unit itself.
Did you know?
Vatican City, the world's smallest independent state, covers just 0.44 km² (about 109 acres) — smaller than many golf courses. By contrast, Russia spans over 17.1 million km², nearly 39 million times larger.
Quick reference: hectare to square centimetre
| hectare | square centimetre |
|---|---|
| 0.1 | 10,000,000 |
| 0.5 | 50,000,000 |
| 1 | 100,000,000 |
| 2 | 200,000,000 |
| 5 | 500,000,000 |
| 10 | 1.000000e+09 |
| 25 | 2.500000e+09 |
| 50 | 5.000000e+09 |
| 100 | 1.000000e+10 |
| 250 | 2.500000e+10 |
| 500 | 5.000000e+10 |
| 1,000 | 1.000000e+11 |
Common values
| hectare | square centimetre | |
|---|---|---|
| A4 paper | 0.0000062 hectare | 620 square centimetre |
| Parking space | 0.00125 hectare | 125,000 square centimetre |
| Tennis court | 0.026087 hectare | 2,608,700 square centimetre |
| Football field (soccer) | 0.714 hectare | 71,400,000 square centimetre |
| Central Park, NYC | 341 hectare | 3.410000e+10 square centimetre |