Square metric area unit.
Square Gigameters to Square Megameters Converter — Gm2 to Mm2
Convert Square Gigameter (Gm2) to Square Megameter (Mm2) using the exact conversion factor (1 square gigameter = 1,000,000 square megameter). See the formula, worked examples, and conversion table.
Square Gigameters to Square Megameters 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 1e+18 / 1e+12.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Gigameters to Square Megameters
Comparing Square Gigameter and Square Megameter 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 megameters = square gigameters × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 square gigameter equals 1e+18 base units, and 1 square megameter equals 1e+12 base units, so dividing one by the other gives the direct square gigameter-to-square megameter factor of 1000000.
Simple example
1 Gm2 × 1000000 = 1,000,000 Mm2
1 square gigameter = 1,000,000 square megameters.
Real-world example
10 Gm2 × 1000000 = 10,000,000 Mm2
10 square gigameters = 10,000,000 square megameters.
Conversion table
| Square Gigameter (Gm2) | Square Megameter (Mm2) |
|---|---|
| 1 Gm2 | 1,000,000 Mm2 |
| 5 Gm2 | 5,000,000 Mm2 |
| 10 Gm2 | 10,000,000 Mm2 |
| 25 Gm2 | 25,000,000 Mm2 |
| 50 Gm2 | 50,000,000 Mm2 |
| 100 Gm2 | 100,000,000 Mm2 |
Reverse conversion: Square Megameter to Square Gigameter
1 Mm2 × 0.000001 = 0.000001 Gm2
1 square megameter = 0.000001 square gigameters.
square gigameters = square megameters × 0.000001
For a page dedicated to this direction, see Square Megameter to Square Gigameter.
Understanding the Square Gigameter (Gm2)
Square metric area unit.
Understanding the Square Megameter (Mm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square megameters are in 1 square gigameter?
1 square gigameter equals 1,000,000 square megameters, using the exact defined conversion factor rather than an estimate.
How do I convert square gigameter to square megameter?
Multiply the square gigameter value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert square megameter back to square gigameter?
Use the reverse factor: 1 square megameter equals 0.000001 square gigameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square gigameter?
Square Gigameter (Gm2) is a unit of area.
What is a square megameter?
Square Megameter (Mm2) is a unit of area.
Is the square gigameter to square megameter conversion exact?
Yes. Both square gigameter and square megameter are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.