Square metric area unit.
Square Millimeters to Sections Converter — mm2 to section
Convert Square Millimeter (mm2) to Section (section) using the exact conversion factor (1 square millimeter = 3.861022e-13 section). See the formula, worked examples, and conversion table.
Square Millimeters to Sections 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.
A US public land survey section is one square mile or 640 acres.
Result = input x 1e-6 / 2.58998811e+6.
Area uses the square meter as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Square Millimeters to Sections
Comparing Square Millimeter and Section 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: Square metric area unit, and a US public land survey section is one square mile or 640 acres.
Formula
sections = square millimeters × 3.861022e-13
This factor comes from each unit's defined relationship to the category's base unit: 1 square millimeter equals 0.000001 base units, and 1 section equals 2589988.11034 base units, so dividing one by the other gives the direct square millimeter-to-section factor of 3.861022e-13.
Simple example
1 mm2 × 3.861022e-13 = 3.861022e-13 section
1 square millimeter = 3.861022e-13 sections.
Real-world example
10 mm2 × 3.861022e-13 = 3.861022e-12 section
10 square millimeters = 3.861022e-12 sections.
Conversion table
| Square Millimeter (mm2) | Section (section) |
|---|---|
| 1 mm2 | 3.861022e-13 section |
| 5 mm2 | 1.930511e-12 section |
| 10 mm2 | 3.861022e-12 section |
| 25 mm2 | 9.652554e-12 section |
| 50 mm2 | 1.930511e-11 section |
| 100 mm2 | 3.861022e-11 section |
Reverse conversion: Section to Square Millimeter
3.861022e-13 section × 2.589988e+12 = 1.000000107 mm2
3.861022e-13 sections = 1.000000107 square millimeters.
square millimeters = sections × 2.589988e+12
For a page dedicated to this direction, see Section to Square Millimeter.
Understanding the Square Millimeter (mm2)
Square metric area unit.
Understanding the Section (section)
A US public land survey section is one square mile or 640 acres.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many sections are in 1 square millimeter?
1 square millimeter equals 3.861022e-13 sections, using the exact defined conversion factor rather than an estimate.
How do I convert square millimeter to section?
Multiply the square millimeter value by 3.861022e-13. The converter above does this instantly to whatever precision you set.
How do I convert section back to square millimeter?
Use the reverse factor: 1 section equals 2.589988e+12 square millimeters. You can also use the swap control in the converter above to flip the direction instantly.
What is a square millimeter?
Square Millimeter (mm2) is a unit of area.
What is a section?
Section (section) is a unit of area.
Is the square millimeter to section conversion exact?
Yes. Both square millimeter and section are defined by fixed standards rather than physical artifacts, so the factor of 3.861022e-13 used above is exact to as many digits as you choose to display.