Square metric area unit.
Square Hectometers to Square Megameters Converter — hm2 to Mm2
Convert Square Hectometer (hm2) to Square Megameter (Mm2) using the exact conversion factor (1 square hectometer = 1e-8 square megameter). See the formula, worked examples, and conversion table.
Square Hectometers 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 10000 / 1e+12.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Hectometers to Square Megameters
Comparing Square Hectometer 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 hectometers × 1e-8
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 megameter equals 1e+12 base units, so dividing one by the other gives the direct square hectometer-to-square megameter factor of 1e-8.
Simple example
1 hm2 × 1e-8 = 1e-8 Mm2
1 square hectometer = 1e-8 square megameters.
Real-world example
10 hm2 × 1e-8 = 1e-7 Mm2
10 square hectometers = 1e-7 square megameters.
Conversion table
| Square Hectometer (hm2) | Square Megameter (Mm2) |
|---|---|
| 1 hm2 | 1e-8 Mm2 |
| 5 hm2 | 5e-8 Mm2 |
| 10 hm2 | 1e-7 Mm2 |
| 25 hm2 | 2.5e-7 Mm2 |
| 50 hm2 | 5e-7 Mm2 |
| 100 hm2 | 0.000001 Mm2 |
Reverse conversion: Square Megameter to Square Hectometer
1e-8 Mm2 × 100000000 = 1 hm2
1e-8 square megameters = 1 square hectometer.
square hectometers = square megameters × 100000000
For a page dedicated to this direction, see Square Megameter to Square Hectometer.
Understanding the Square Hectometer (hm2)
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 hectometer?
1 square hectometer equals 1e-8 square megameters, using the exact defined conversion factor rather than an estimate.
How do I convert square hectometer to square megameter?
Multiply the square hectometer value by 1e-8. The converter above does this instantly to whatever precision you set.
How do I convert square megameter back to square hectometer?
Use the reverse factor: 1 square megameter equals 100,000,000 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 megameter?
Square Megameter (Mm2) is a unit of area.
Is the square hectometer to square megameter conversion exact?
Yes. Both square hectometer and square megameter are defined by fixed standards rather than physical artifacts, so the factor of 1e-8 used above is exact to as many digits as you choose to display.