Square metric area unit.
Square Hectometers to Square Gigameters Converter — hm2 to Gm2
Convert Square Hectometer (hm2) to Square Gigameter (Gm2) using the exact conversion factor (1 square hectometer = 1e-14 square gigameter). See the formula, worked examples, and conversion table.
Square Hectometers to Square Gigameters converter
Converter
Area Converter
Convert land, construction, mapping, survey, and scientific area units.
Context values
Some unit families need one extra value for a physically accurate result.
Square metric area unit.
Result = input x 10000 / 1e+18.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Hectometers to Square Gigameters
Comparing Square Hectometer and Square Gigameter is common in agriculture and real estate, where US land is typically measured in acres and most of the rest of the world uses hectares. Both are square metric area unit units.
Formula
square gigameters = square hectometers × 1e-14
This factor comes from each unit's defined relationship to the category's base unit: 1 square hectometer equals 10000 base units, and 1 square gigameter equals 1e+18 base units, so dividing one by the other gives the direct square hectometer-to-square gigameter factor of 1e-14.
Simple example
1 hm2 × 1e-14 = 1e-14 Gm2
1 square hectometer = 1e-14 square gigameters.
Real-world example
10 hm2 × 1e-14 = 1e-13 Gm2
10 square hectometers = 1e-13 square gigameters.
Conversion table
| Square Hectometer (hm2) | Square Gigameter (Gm2) |
|---|---|
| 1 hm2 | 1e-14 Gm2 |
| 5 hm2 | 5e-14 Gm2 |
| 10 hm2 | 1e-13 Gm2 |
| 25 hm2 | 2.5e-13 Gm2 |
| 50 hm2 | 5e-13 Gm2 |
| 100 hm2 | 1e-12 Gm2 |
Reverse conversion: Square Gigameter to Square Hectometer
1e-14 Gm2 × 1e+14 = 1 hm2
1e-14 square gigameters = 1 square hectometer.
square hectometers = square gigameters × 1e+14
For a page dedicated to this direction, see Square Gigameter to Square Hectometer.
Understanding the Square Hectometer (hm2)
Square metric area unit.
Understanding the Square Gigameter (Gm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square gigameters are in 1 square hectometer?
1 square hectometer equals 1e-14 square gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert square hectometer to square gigameter?
Multiply the square hectometer value by 1e-14. The converter above does this instantly to whatever precision you set.
How do I convert square gigameter back to square hectometer?
Use the reverse factor: 1 square gigameter equals 1e+14 square hectometers. You can also use the swap control in the converter above to flip the direction instantly.
What is a square hectometer?
Square Hectometer (hm2) is a unit of area.
What is a square gigameter?
Square Gigameter (Gm2) is a unit of area.
Is the square hectometer to square gigameter conversion exact?
Yes. Both square hectometer and square gigameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-14 used above is exact to as many digits as you choose to display.