An are is 100 square meters.
Ares to Square Millimeters Converter — a to mm2
Convert Are (a) to Square Millimeter (mm2) using the exact conversion factor (1 are = 100,000,000 square millimeter). See the formula, worked examples, and conversion table.
Ares to Square Millimeters 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 100 / 1e-6.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Ares to Square Millimeters
Comparing Are and Square Millimeter 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. Specifically: An are is 100 square meters, and square metric area unit.
Formula
square millimeters = ares × 100000000
This factor comes from each unit's defined relationship to the category's base unit: 1 are equals 100 base units, and 1 square millimeter equals 0.000001 base units, so dividing one by the other gives the direct are-to-square millimeter factor of 100000000.
Simple example
1 a × 100000000 = 100,000,000 mm2
1 are = 100,000,000 square millimeters.
Real-world example
10 a × 100000000 = 1,000,000,000 mm2
10 ares = 1,000,000,000 square millimeters.
Conversion table
| Are (a) | Square Millimeter (mm2) |
|---|---|
| 1 a | 100,000,000 mm2 |
| 5 a | 500,000,000 mm2 |
| 10 a | 1,000,000,000 mm2 |
| 25 a | 2,500,000,000 mm2 |
| 50 a | 5,000,000,000 mm2 |
| 100 a | 10,000,000,000 mm2 |
Reverse conversion: Square Millimeter to Are
1 mm2 × 1e-8 = 1e-8 a
1 square millimeter = 1e-8 ares.
ares = square millimeters × 1e-8
For a page dedicated to this direction, see Square Millimeter to Are.
Understanding the Are (a)
An are is 100 square meters.
Understanding the Square Millimeter (mm2)
Square metric area unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many square millimeters are in 1 are?
1 are equals 100,000,000 square millimeters, using the exact defined conversion factor rather than an estimate.
How do I convert are to square millimeter?
Multiply the are value by 100000000. The converter above does this instantly to whatever precision you set.
How do I convert square millimeter back to are?
Use the reverse factor: 1 square millimeter equals 1e-8 ares. You can also use the swap control in the converter above to flip the direction instantly.
What is a are?
Are (a) is a unit of area.
What is a square millimeter?
Square Millimeter (mm2) is a unit of area.
Is the are to square millimeter conversion exact?
Yes. Both are and square millimeter are defined by fixed standards rather than physical artifacts, so the factor of 100000000 used above is exact to as many digits as you choose to display.