Square metric area unit.
Square Megameters to Square Gigameters Converter — Mm2 to Gm2
Convert Square Megameter (Mm2) to Square Gigameter (Gm2) using the exact conversion factor (1 square megameter = 0.000001 square gigameter). See the formula, worked examples, and conversion table.
Square Megameters 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 1e+12 / 1e+18.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Megameters to Square Gigameters
Comparing Square Megameter 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 megameters × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 square megameter equals 1e+12 base units, and 1 square gigameter equals 1e+18 base units, so dividing one by the other gives the direct square megameter-to-square gigameter factor of 0.000001.
Simple example
1 Mm2 × 0.000001 = 0.000001 Gm2
1 square megameter = 0.000001 square gigameters.
Real-world example
10 Mm2 × 0.000001 = 0.00001 Gm2
10 square megameters = 0.00001 square gigameters.
Conversion table
| Square Megameter (Mm2) | Square Gigameter (Gm2) |
|---|---|
| 1 Mm2 | 0.000001 Gm2 |
| 5 Mm2 | 0.000005 Gm2 |
| 10 Mm2 | 0.00001 Gm2 |
| 25 Mm2 | 0.000025 Gm2 |
| 50 Mm2 | 0.00005 Gm2 |
| 100 Mm2 | 0.0001 Gm2 |
Reverse conversion: Square Gigameter to Square Megameter
0.000001 Gm2 × 1000000 = 1 Mm2
0.000001 square gigameters = 1 square megameter.
square megameters = square gigameters × 1000000
For a page dedicated to this direction, see Square Gigameter to Square Megameter.
Understanding the Square Megameter (Mm2)
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 megameter?
1 square megameter equals 0.000001 square gigameters, using the exact defined conversion factor rather than an estimate.
How do I convert square megameter to square gigameter?
Multiply the square megameter value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert square gigameter back to square megameter?
Use the reverse factor: 1 square gigameter equals 1,000,000 square megameters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square megameter?
Square Megameter (Mm2) is a unit of area.
What is a square gigameter?
Square Gigameter (Gm2) is a unit of area.
Is the square megameter to square gigameter conversion exact?
Yes. Both square megameter and square gigameter are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.